NASA

ESA/Webb, NASA & CSA, J. H. Kastner (Rochester Institute of Technology)

Using its Near-InfraRed Camera (NIRCam), NASA’s James Webb Space Telescope captured never-before-seen details of the Red Spider Nebula, a planetary nebula, in this image released on Oct. 26, 2025. NIRCam is Webb’s primary near-infrared imager, providing high-resolution imaging and spectroscopy for a wide variety of investigations.

Webb’s new view of the Red Spider Nebula reveals for the first time the full extent of the nebula’s outstretched lobes, which form the ‘legs’ of the spider. These lobes, shown in blue, are traced by light emitted from H2 molecules, which contain two hydrogen atoms bonded together. Stretching over the entirety of NIRCam’s field of view, these lobes are shown to be closed, bubble-like structures that each extend about 3 light-years. Outflowing gas from the center of the nebula has inflated these massive bubbles over thousands of years.

Image credit: ESA/Webb, NASA & CSA, J. H. Kastner (Rochester Institute of Technology)

NASA’s Lucy spacecraft captured images of the Moon’s surface on Oct 16, 2022, after flying by the Earth for its first of three gravity assists.

Crater rims are vital landmarks for planetary science and navigation. Yet detecting them in real imagery is tough, with shadows, lighting shifts, and broken edges obscuring their shape.

This project invites you to develop methods that can reliably fit ellipses to crater rims, helping advance future space exploration.

In the pursuit of next generation, terrain-based optical navigation, NASA is developing a system that will use a visible-light camera on a spacecraft to capture orbital images of lunar terrain and process the imagery to:

• detect the crater rims in the images,
• identify the craters from a catalog, and
• estimate the camera/vehicle position based on the identified craters.

The focus of this project is the crater detection process.

Natural imagery varies significantly in lighting and will impact the completeness of crater rims in the images.

Award: $55,000 in total prizes

Open Date: November 25, 2025

Close Date: January 19, 2026

For more information, visit: https://www.topcoder.com/nasa-crater-detection

NASA’s Lucy spacecraft captured images of the Moon’s surface on Oct 16, 2022, after flying by the Earth for its first of three gravity assists.

Crater rims are vital landmarks for planetary science and navigation. Yet detecting them in real imagery is tough, with shadows, lighting shifts, and broken edges obscuring their shape.

This project invites you to develop methods that can reliably fit ellipses to crater rims, helping advance future space exploration.

In the pursuit of next generation, terrain-based optical navigation, NASA is developing a system that will use a visible-light camera on a spacecraft to capture orbital images of lunar terrain and process the imagery to:

• detect the crater rims in the images,
• identify the craters from a catalog, and
• estimate the camera/vehicle position based on the identified craters.

The focus of this project is the crater detection process.

Natural imagery varies significantly in lighting and will impact the completeness of crater rims in the images.

Award: $55,000 in total prizes

Open Date: November 25, 2025

Close Date: January 19, 2026

For more information, visit: https://www.topcoder.com/nasa-crater-detection

CHAPEA mission 2 crew members (from left) Ross Elder, Ellen Ellis, Matthew Montgomery, and James Spicer pose in front of the door to the simulated Martian landscape for their first photo inside the CHAPEA habitat after their mission began in October 2025. Credits: NASA/CHAPEA Crew

A crew of four research volunteers stepped inside NASA’s CHAPEA (Crew Health and Performance Exploration Analog) habitat on Oct. 19, marking the start of the agency’s second 378-day simulated Mars mission.

Ross Elder, Ellen Ellis, Matthew Montgomery, and James Spicer are living and working inside the roughly 1,700-square-foot 3D-printed habitat at the agency’s Johnson Space Center in Houston until Oct. 31, 2026.

“The information and lessons learned through CHAPEA will inform real-life mission planning, vehicle and surface habitat designs, and other resources NASA needs to support crew health and performance as we venture beyond low-Earth orbit,” said Sara Whiting, Human Research Program project scientist. “Through these lessons, NASA’s Human Research Program is reducing human health and performance risks of spaceflight to enable safe and successful crewed missions to the Moon, Mars, and beyond.”

The crew will face the challenges of a real Mars mission, and only leave to perform simulated “Marswalk” activities directly outside the habitat, wearing spacesuits, to traverse a simulated Mars environment filled with red sand. During these Marswalks, they will remain isolated within the building that houses CHAPEA at NASA Johnson.

“These crewmembers will help provide foundational data for mission planning and vehicle design and inform trades between resources, methods, and technologies that best support health and performance within the constraints of living on Mars,” said Grace Douglas, CHAPEA principal investigator. “The information gained from these simulated missions is critical to NASA’s goal of sending astronauts to explore Mars.”

During the year ahead, the crew will complete a variety of activities designed to replicate life and work on a long-duration mission on Mars, including high-tempo simulated Marswalks, robotic operations, habitat maintenance, physical exercise, and crop cultivation. The mission also aims to investigate how the crew adapts and responds to various environmental stressors that may arise during a real Martian mission, including limited access to resources, prolonged isolation, 22-minute communication delays, and equipment failures. Researchers will study how the team manages these conditions, which will inform future protocols and plans ahead of future crewed missions to Mars.

The first CHAPEA mission, which took place in the same habitat, concluded on July 6, 2024.

The CHAPEA mission 2 main crew and two alternate crew members are pictured in front of the Space Exploration Vehicle, the prototype pressurized rover that transported crew members to the habitat at the start of the mission. Credits: NASA/James Blair Ross Elder, CHAPEA mission 2 commander, waves to agency leaders and staff who are supporting the mission before he steps into the habitat. Credits: NASA/James Blair Suzanne Bell, CHAPEA Mission 2 Co-Principal Investigator, offers remarks to crew members Matthew Montgomery, James Spicer, Ross Elder, and Ellen Ellis directly before they enter the habitat for the 378-day mission. Credits: NASA/James Blair

____

NASA’s Human Research Program

NASA’s Human Research Program pursues methods and technologies to support safe, productive human space travel. Through science conducted in laboratories, ground-based analogs, commercial missions, the International Space Station and Artemis missions, the program scrutinizes how spaceflight affects human bodies and behaviors. Such research drives the program’s quest to innovate ways that keep astronauts healthy and mission ready as human space exploration expands to the Moon, Mars, and beyond.

Explore More 5 min read NASA’s 2025 Astronaut Candidates: Shaping Artemis Exploration  Article 2 days ago 4 min read The Overview Effect: Astronaut Perspectives from 25 Years in Low Earth Orbit Article 3 days ago 8 min read 25 Years of Scientific Discovery Aboard the International Space Station Article 5 days ago Keep Exploring Discover More Topics From NASA

Living in Space

Artemis

Human Research Program

Space Station Research and Technology

CHAPEA mission 2 crew members (from left) Ross Elder, Ellen Ellis, Matthew Montgomery, and James Spicer pose in front of the door to the simulated Martian landscape for their first photo inside the CHAPEA habitat after their mission began in October 2025. Credits: NASA/CHAPEA Crew

A crew of four research volunteers stepped inside NASA’s CHAPEA (Crew Health and Performance Exploration Analog) habitat on Oct. 19, marking the start of the agency’s second 378-day simulated Mars mission.

Ross Elder, Ellen Ellis, Matthew Montgomery, and James Spicer are living and working inside the roughly 1,700-square-foot 3D-printed habitat at the agency’s Johnson Space Center in Houston until Oct. 31, 2026.

“The information and lessons learned through CHAPEA will inform real-life mission planning, vehicle and surface habitat designs, and other resources NASA needs to support crew health and performance as we venture beyond low-Earth orbit,” said Sara Whiting, Human Research Program project scientist. “Through these lessons, NASA’s Human Research Program is reducing human health and performance risks of spaceflight to enable safe and successful crewed missions to the Moon, Mars, and beyond.”

The crew will face the challenges of a real Mars mission, and only leave to perform simulated “Marswalk” activities directly outside the habitat, wearing spacesuits, to traverse a simulated Mars environment filled with red sand. During these Marswalks, they will remain isolated within the building that houses CHAPEA at NASA Johnson.

“These crewmembers will help provide foundational data for mission planning and vehicle design and inform trades between resources, methods, and technologies that best support health and performance within the constraints of living on Mars,” said Grace Douglas, CHAPEA principal investigator. “The information gained from these simulated missions is critical to NASA’s goal of sending astronauts to explore Mars.”

During the year ahead, the crew will complete a variety of activities designed to replicate life and work on a long-duration mission on Mars, including high-tempo simulated Marswalks, robotic operations, habitat maintenance, physical exercise, and crop cultivation. The mission also aims to investigate how the crew adapts and responds to various environmental stressors that may arise during a real Martian mission, including limited access to resources, prolonged isolation, 22-minute communication delays, and equipment failures. Researchers will study how the team manages these conditions, which will inform future protocols and plans ahead of future crewed missions to Mars.

The first CHAPEA mission, which took place in the same habitat, concluded on July 6, 2024.

The CHAPEA mission 2 main crew and two alternate crew members are pictured in front of the Space Exploration Vehicle, the prototype pressurized rover that transported crew members to the habitat at the start of the mission. Credits: NASA/James Blair Ross Elder, CHAPEA mission 2 commander, waves to agency leaders and staff who are supporting the mission before he steps into the habitat. Credits: NASA/James Blair Suzanne Bell, CHAPEA Mission 2 Co-Principal Investigator, offers remarks to crew members Matthew Montgomery, James Spicer, Ross Elder, and Ellen Ellis directly before they enter the habitat for the 378-day mission. Credits: NASA/James Blair

____

NASA’s Human Research Program

NASA’s Human Research Program pursues methods and technologies to support safe, productive human space travel. Through science conducted in laboratories, ground-based analogs, commercial missions, the International Space Station and Artemis missions, the program scrutinizes how spaceflight affects human bodies and behaviors. Such research drives the program’s quest to innovate ways that keep astronauts healthy and mission ready as human space exploration expands to the Moon, Mars, and beyond.

Explore More 5 min read NASA’s 2025 Astronaut Candidates: Shaping Artemis Exploration  Article 2 days ago 4 min read The Overview Effect: Astronaut Perspectives from 25 Years in Low Earth Orbit Article 3 days ago 8 min read 25 Years of Scientific Discovery Aboard the International Space Station Article 6 days ago Keep Exploring Discover More Topics From NASA

Living in Space

Artemis

Human Research Program

Space Station Research and Technology

5 min read

Preparations for Next Moonwalk Simulations Underway (and Underwater) The European Space Agency’s Mars Express orbiter captured this view of Mars’ south polar ice cap Feb. 25, 2015. Three years later, the spacecraft detected a signal from the area to the right of the ice cap that scientists interpreted as an underground lake.ESA/DLR/FU Berlin, CC BY-SA 3.0 IGO

Results from an enhanced radar technique have demonstrated improvement to sub-surface observations of Mars. 

NASA’s Mars Reconnaissance Orbiter (MRO) has revisited and raised new questions about a mysterious feature buried beneath thousands of feet of ice at the Red Planet’s south pole. In a recent study, researchers conclude from data obtained using an innovative radar technique that an area on Mars suspected of being an underground lake is more likely to be a layer of rock and dust.  

The 2018 discovery of the suspected lake set off a flurry of scientific activity, as water is closely linked with life in the solar system. While the latest findings indicate this feature is not a lake below the Martian surface, it does suggest that the same radar technique could be used to check for subsurface resources elsewhere on Mars, supporting future explorers. 

The paper, published in Geophysical Research Letters on Nov. 17, was led by two of MRO’s Shallow Radar (SHARAD) instrument scientists, Gareth Morgan and Than Putzig, who are based at the Planetary Science Institute in Tucson, Arizona, and Lakewood, Colorado, respectively. 

The observations were made by MRO with a special maneuver that rolls the spacecraft 120 degrees. Doing so enhances the power of SHARAD, enabling the radar’s signal to penetrate deeper underground and provide a clearer image of the subsurface. These “very large rolls” have proved so effective that scientists are eager to use them at previously observed sites where buried ice might exist. 

This map shows the approximate area where in 2018 ESA’s Mars Express detected a signal the mission’s scientists interpreted as an underground lake. The red lines show the path of NASA’s Mars Reconnaissance Orbiter, which flew both directly overhead as well as over an adjacent region. Credit: Planetary Science Institute

Morgan, Putzig, and fellow SHARAD team members had made multiple unsuccessful attempts to observe the area suspected of hosting a buried lake. Then the scientists partnered with the spacecraft’s operations team at NASA’s Jet Propulsion Laboratory in Southern California, which leads the mission, to develop the very large roll capability. 

Because the radar’s antenna is at the back of MRO, the orbiter’s body obstructs its view and weakens the instrument’s sensitivity. After considerable work, engineers at JPL and Lockheed Martin Space in Littleton, Colorado, which built the spacecraft and supports its operations, developed commands for a 120-degree roll — a technique that requires careful planning to keep the spacecraft safe — to direct more of SHARAD’s signal at the surface.

Bright signal  

On May 26, SHARAD performed a very large roll to finally pick up the signal in the target area, which spans about 12.5 miles (20 kilometers) and is buried under a slab of water ice almost 1 mile (1,500 meters) thick.  

When a radar signal bounces off underground layers, the strength of its reflection depends on what the subsurface is made of. Most materials let the signal slip through or absorb it, making the return faint. Liquid water is special in that it produces a very reflective surface, sending back a very strong signal (imagine pointing a flashlight at a mirror). 

That’s the kind of signal that was spotted from this area in 2018 by a team working with the Mars Advanced Radar for Subsurface and Ionospheric Sounding (MARSIS) instrument aboard the ESA (European Space Agency) Mars Express orbiter. To explain how such a body of water could remain liquid under all that ice, scientists have hypothesized it could be a briny lake, since high salt content can lower water’s freezing temperature. 

An antenna sticks out like whiskers from NASA’s Mars Reconnaissance Orbiter in this artist’s concept depicting the spacecraft, which has been orbiting the Red Planet since 2006. This antenna is part of SHARAD, a radar that peers below the Martian surface.NASA/JPL-Caltech

“We’ve been observing this area with SHARAD for almost 20 years without seeing anything from those depths,” said Putzig. But once MRO achieved a very large roll over the precise area, the team was able to look much deeper. And rather than the bright signal MARSIS received, SHARAD detected a faint one. A different very-large-roll observation of an adjacent area didn’t detect a signal at all, suggesting something unique is causing a quirky radar signal at the exact spot MARSIS saw a signal. 

“The lake hypothesis generated lots of creative work, which is exactly what exciting scientific discoveries are supposed to do,” said Morgan. “And while this new data won’t settle the debate, it makes it very hard to support the idea of a liquid water lake.”

Alternative explanations

Mars’ south pole has an ice cap sitting atop heavily cratered terrain, and most radar images of the area below the ice show lots of peaks and valleys. Morgan and Putzig said it’s possible that the bright signal MARSIS detected here may just be a rare smooth area — an ancient lava flow, for example. 

Both scientists are excited to use the very large roll technique to reexamine other scientifically interesting regions of Mars. One such place is Medusae Fossae, a sprawling geologic formation on Mars’ equator that produces little radar return. While some scientists have suggested it’s composed of layers of volcanic ash, others have suggested the layers may include heaps of ice deep within. 

“If it’s ice, that means there’s lots of water resources near the Martian equator, where you’d want to send humans,” said Putzig. “Because the equator is exposed to more sunlight, it’s warmer and ideal for astronauts to live and work.” 

More about MRO

NASA’s Jet Propulsion Laboratory in Southern California manages MRO for the agency’s Science Mission Directorate in Washington as part of NASA’s Mars Exploration Program portfolio. Lockheed Martin Space in Denver built MRO and supports its operations. SHARAD was provided to the MRO mission by the Italian Space Agency (ASI).

News Media Contacts

Andrew Good 
Jet Propulsion Laboratory, Pasadena, Calif. 
818-393-2433 
andrew.c.good@jpl.nasa.gov 

Karen Fox / Molly Wasser 
NASA Headquarters, Washington
202-358-1600
karen.c.fox@nasa.gov / molly.l.wasser@nasa.gov

2025-130

Share

Details Last Updated Nov 25, 2025 Related Terms

• Mars Reconnaissance Orbiter (MRO)
• Mars
• Planetary Environments & Atmospheres

Explore More 6 min read NASA’s Mars Spacecraft Capture Images of Comet 3I/ATLAS Article 7 days ago 3 min read View Interstellar Comet 3I/ATLAS Through NASA’s Multiple Lenses 

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Mars Reconnaissance Orbiter

NASA’s Mars Reconnaissance Orbiter (MRO) is the second longest-lived spacecraft to orbit Mars, after 2001 Mars Odyssey.

MRO Science

Overview Among other ongoing  achievements, data collected by Mars Reconnaissance Orbiter continues to help Mars scientists and engineers characterize potential…

Mars Express

NASA Participation  In partnership with their European colleagues, U.S. scientists are participating in the scientific instrument teams of the Mars…

5 min read

Preparations for Next Moonwalk Simulations Underway (and Underwater) The European Space Agency’s Mars Express orbiter captured this view of Mars’ south polar ice cap Feb. 25, 2015. Three years later, the spacecraft detected a signal from the area to the right of the ice cap that scientists interpreted as an underground lake.ESA/DLR/FU Berlin, CC BY-SA 3.0 IGO

Results from an enhanced radar technique have demonstrated improvement to sub-surface observations of Mars. 

NASA’s Mars Reconnaissance Orbiter (MRO) has revisited and raised new questions about a mysterious feature buried beneath thousands of feet of ice at the Red Planet’s south pole. In a recent study, researchers conclude from data obtained using an innovative radar technique that an area on Mars suspected of being an underground lake is more likely to be a layer of rock and dust.  

The 2018 discovery of the suspected lake set off a flurry of scientific activity, as water is closely linked with life in the solar system. While the latest findings indicate this feature is not a lake below the Martian surface, it does suggest that the same radar technique could be used to check for subsurface resources elsewhere on Mars, supporting future explorers. 

The paper, published in Geophysical Research Letters on Nov. 17, was led by two of MRO’s Shallow Radar (SHARAD) instrument scientists, Gareth Morgan and Than Putzig, who are based at the Planetary Science Institute in Tucson, Arizona, and Lakewood, Colorado, respectively. 

The observations were made by MRO with a special maneuver that rolls the spacecraft 120 degrees. Doing so enhances the power of SHARAD, enabling the radar’s signal to penetrate deeper underground and provide a clearer image of the subsurface. These “very large rolls” have proved so effective that scientists are eager to use them at previously observed sites where buried ice might exist. 

This map shows the approximate area where in 2018 ESA’s Mars Express detected a signal the mission’s scientists interpreted as an underground lake. The red lines show the path of NASA’s Mars Reconnaissance Orbiter, which flew both directly overhead as well as over an adjacent region. Credit: Planetary Science Institute

Morgan, Putzig, and fellow SHARAD team members had made multiple unsuccessful attempts to observe the area suspected of hosting a buried lake. Then the scientists partnered with the spacecraft’s operations team at NASA’s Jet Propulsion Laboratory in Southern California, which leads the mission, to develop the very large roll capability. 

Because the radar’s antenna is at the back of MRO, the orbiter’s body obstructs its view and weakens the instrument’s sensitivity. After considerable work, engineers at JPL and Lockheed Martin Space in Littleton, Colorado, which built the spacecraft and supports its operations, developed commands for a 120-degree roll — a technique that requires careful planning to keep the spacecraft safe — to direct more of SHARAD’s signal at the surface.

Bright signal  

On May 26, SHARAD performed a very large roll to finally pick up the signal in the target area, which spans about 12.5 miles (20 kilometers) and is buried under a slab of water ice almost 1 mile (1,500 meters) thick.  

When a radar signal bounces off underground layers, the strength of its reflection depends on what the subsurface is made of. Most materials let the signal slip through or absorb it, making the return faint. Liquid water is special in that it produces a very reflective surface, sending back a very strong signal (imagine pointing a flashlight at a mirror). 

That’s the kind of signal that was spotted from this area in 2018 by a team working with the Mars Advanced Radar for Subsurface and Ionospheric Sounding (MARSIS) instrument aboard the ESA (European Space Agency) Mars Express orbiter. To explain how such a body of water could remain liquid under all that ice, scientists have hypothesized it could be a briny lake, since high salt content can lower water’s freezing temperature. 

An antenna sticks out like whiskers from NASA’s Mars Reconnaissance Orbiter in this artist’s concept depicting the spacecraft, which has been orbiting the Red Planet since 2006. This antenna is part of SHARAD, a radar that peers below the Martian surface.NASA/JPL-Caltech

“We’ve been observing this area with SHARAD for almost 20 years without seeing anything from those depths,” said Putzig. But once MRO achieved a very large roll over the precise area, the team was able to look much deeper. And rather than the bright signal MARSIS received, SHARAD detected a faint one. A different very-large-roll observation of an adjacent area didn’t detect a signal at all, suggesting something unique is causing a quirky radar signal at the exact spot MARSIS saw a signal. 

“The lake hypothesis generated lots of creative work, which is exactly what exciting scientific discoveries are supposed to do,” said Morgan. “And while this new data won’t settle the debate, it makes it very hard to support the idea of a liquid water lake.”

Alternative explanations

Mars’ south pole has an ice cap sitting atop heavily cratered terrain, and most radar images of the area below the ice show lots of peaks and valleys. Morgan and Putzig said it’s possible that the bright signal MARSIS detected here may just be a rare smooth area — an ancient lava flow, for example. 

Both scientists are excited to use the very large roll technique to reexamine other scientifically interesting regions of Mars. One such place is Medusae Fossae, a sprawling geologic formation on Mars’ equator that produces little radar return. While some scientists have suggested it’s composed of layers of volcanic ash, others have suggested the layers may include heaps of ice deep within. 

“If it’s ice, that means there’s lots of water resources near the Martian equator, where you’d want to send humans,” said Putzig. “Because the equator is exposed to more sunlight, it’s warmer and ideal for astronauts to live and work.” 

More about MRO

NASA’s Jet Propulsion Laboratory in Southern California manages MRO for the agency’s Science Mission Directorate in Washington as part of NASA’s Mars Exploration Program portfolio. Lockheed Martin Space in Denver built MRO and supports its operations. SHARAD was provided to the MRO mission by the Italian Space Agency (ASI).

News Media Contacts

Andrew Good 
Jet Propulsion Laboratory, Pasadena, Calif. 
818-393-2433 
andrew.c.good@jpl.nasa.gov 

Karen Fox / Molly Wasser 
NASA Headquarters, Washington
202-358-1600
karen.c.fox@nasa.gov / molly.l.wasser@nasa.gov

2025-130

Share

Details Last Updated Nov 25, 2025 Related Terms

• Mars Reconnaissance Orbiter (MRO)
• Mars
• Planetary Environments & Atmospheres

Explore More 6 min read NASA’s Mars Spacecraft Capture Images of Comet 3I/ATLAS Article 1 week ago 3 min read View Interstellar Comet 3I/ATLAS Through NASA’s Multiple Lenses 

This article was updated to include the full range of dates from the SOHO image.…

Article 1 week ago 4 min read What Would It Take to Say We Found Life? We Asked a NASA Expert: Episode 63 Article 3 months ago Keep Exploring Discover Related Topics Mars Exploration

Mars is the only planet we know of inhabited entirely by robots. Learn more about the Mars Missions.

Mars Reconnaissance Orbiter

NASA’s Mars Reconnaissance Orbiter (MRO) is the second longest-lived spacecraft to orbit Mars, after 2001 Mars Odyssey.

MRO Science

Overview Among other ongoing  achievements, data collected by Mars Reconnaissance Orbiter continues to help Mars scientists and engineers characterize potential…

Mars Express

NASA Participation  In partnership with their European colleagues, U.S. scientists are participating in the scientific instrument teams of the Mars…

What does the Milky Way look like in radio waves?

5 Min Read NASA’s 2025 Astronaut Candidates: Shaping Artemis Exploration  NASA’s Johnson Space Center Director Vanessa Wyche introduces the agency’s 24th astronaut class on Sept. 22, 2025. Credits: NASA/James Blair

When NASA’s 2025 astronaut candidates arrived at the agency’s Johnson Space Center in Houston this fall, they stepped into history, sharing a common mission to master the skills and teamwork that define NASA’s next era of exploration. 

Selected from a pool of more than 8,000 applicants, the new class represents a range of backgrounds — military test pilots, engineers, a physician, and a scientist — but all were inspired by moments in their lives that set them on a path to space.  

They will spend nearly two years in training before becoming eligible for missions to low Earth orbit, the Moon, and eventually, Mars. When they graduate, they will join NASA’s active astronaut corps, advancing science aboard the International Space Station and supporting Artemis missions that will carry human exploration farther than ever before. 

During the class announcement at Johnson on Sept. 22, 2025, Center Director Vanessa Wyche celebrated the moment as a milestone for exploration. 

“Today is an exciting day for our nation and for all of humanity as we introduce NASA’s 2025 astronaut candidates — the next generation who will help us explore the Moon, Mars, and beyond,” Wyche said. “Each one of these candidates brings unique experiences and perspectives that reflect the diversity of America and the spirit of exploration that defines NASA.” 

Behind their new blue flight suits are years of preparation and stories as multifaceted as the missions they will one day support. 

Different Roads to the Same Horizon 

NASA’s new astronaut candidates greet the crowd for the first time at Johnson Space Center in Houston.NASA/James Blair

Some of the candidates built their careers in the air, where precision, communication, and teamwork were part of every mission. Former U.S. Navy pilot and test pilot Rebecca Lawler says that is exactly what drew her to NASA. 

“All of these people are coming from different disciplines and levels of expertise, and you’re all working together to get science to fly,” she said. “That’s what excites me most — bringing those experiences together as a team.” 

Imelda Muller, an anesthesiologist and former U.S. Navy undersea medical officer, said her experience supporting experimental diving teams taught her how people from different backgrounds can come together under one mission, something she sees echoed at NASA. 

Muller remembers looking up at the night sky as a kid, able to see almost every star on a clear night. Her grandfather worked on the Apollo program and used to share stories with her, and she says the mix of stargazing and imagining those missions inspired her dream of becoming an astronaut. 

Anna Menon, a biomedical engineer and former flight controller, has seen the human side of spaceflight from the ground and from space. She supported astronaut health aboard the space station from the Mission Control Center in Houston and served as a mission specialist and medical officer aboard SpaceX’s Polaris Dawn mission.

As more people venture into space, we have this incredible opportunity to learn how the human body changes in microgravity. That knowledge will help keep crews healthy as we go farther than ever before.

Anna Menon

NASA Astronaut Candidate

A Houston native, she discovered her passion for exploration in the fourth grade during a field trip to Johnson. “That experience lit a fire in me to want to be part of the space industry,” she said. 

The Language of Human Spaceflight 

NASA astronaut candidate Erin Overcash speaks during the class announcement ceremony at Johnson Space Center.NASA/James Blair

For the test pilots — including Adam Fuhrmann, Cameron Jones, Ben Bailey, and Erin Overcash — flight testing taught adaptability, composure, and the discipline to make quick decisions when it matters most. As Fuhrmann put it, it is about knowing when to lead and when to listen. 

In flight test, nothing happens alone. We work with incredible engineers and professionals to plan and execute complex missions. That teamwork translates perfectly to human spaceflight.

Adam Fuhrmann

NASA Astronaut Candidate

Every astronaut candidate will spend nearly two years learning spacecraft systems, practicing spacewalks in the Neutral Buoyancy Laboratory, flying T-38 jets, and studying geology, robotics, and survival training. 

As U.S. Army Chief Warrant Officer and helicopter test pilot Ben Bailey said, it is not one skill that matters most — it is the combination. 

“Each one is exciting on its own — flying, language training, spacewalks — but getting to do them all together, as a crew, that’s the best part,” Bailey said. 

During the event, current astronauts welcomed the new class and shared advice drawn from their own journeys in human spaceflight. “Thankfully, you will have some of the most talented, passionate instructors and an incredibly dedicated team here at NASA,” said NASA astronaut Chris Williams. “Some of the most special moments will come as you find how much you get to learn from each other.” 

From the International Space Station, NASA astronaut Zena Cardman encouraged the candidates to “learn everything you can, get to know each other, and enjoy the ride.” 

NASA astronaut Jonny Kim followed with a reminder every explorer carries forward: “The people sitting beside you now will become lifelong friends.” 

Explorers of the Golden Age 

The 2025 astronaut candidates with NASA leadership during their class announcement. NASA/James Blair

From geologist Lauren Edgar, who worked on the Curiosity Mars Rover and the Artemis III science team, to engineers like Yuri Kubo, who completed seven NASA internships, and Katherine Spies, who designed and tested flight systems that make exploration possible, each brings a layer of expertise to the agency’s future on the Moon and beyond. 

I’ve always loved figuring out how things work and finding ways to make them better. That’s what drew me to engineering, and it’s what keeps me excited about exploration.

Yuri Kubo

NASA Astronaut Candidate

A New Era Begins 

NASA’s astronaut candidate class pose for a selfie during their first week at Johnson Space Center. NASA

At the announcement ceremony, NASA Flight Operations Director Norm Knight said, “Every lesson learned aboard station has paved the way for where we’re headed next – to the Moon, this time to stay, and on to Mars. We have a group of individuals who are not only exceptional, but who will be inspirational for the United States of America and for our planet.”  

Together, the astronaut candidates reflect the spirit of Artemis — curiosity, courage, and continuous learning as humanity prepares for its next giant leap. 

About the AuthorSumer Loggins

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Details Last Updated Nov 25, 2025 Related Terms

• Johnson Space Center
• Candidate Astronauts
• General

Explore More 5 min read NASA Johnson Celebrates 25 Years of Humanity in Space  Article 7 days ago 3 min read Aaisha Ali: From Marine Biology to the Artemis Control Room  Article 5 months ago 4 min read Mark Cavanaugh: Integrating Safety into the Orion Spacecraft  Article 4 months ago Keep Exploring Discover More Topics From NASA

Missions

Humans in Space

Climate Change

Solar System

5 Min Read NASA’s 2025 Astronaut Candidates: Shaping Artemis Exploration  NASA’s Johnson Space Center Director Vanessa Wyche introduces the agency’s 24th astronaut class on Sept. 22, 2025. Credits: NASA/James Blair

When NASA’s 2025 astronaut candidates arrived at the agency’s Johnson Space Center in Houston this fall, they stepped into history, sharing a common mission to master the skills and teamwork that define NASA’s next era of exploration. 

Selected from a pool of more than 8,000 applicants, the new class represents a range of backgrounds — military test pilots, engineers, a physician, and a scientist — but all were inspired by moments in their lives that set them on a path to space.  

They will spend nearly two years in training before becoming eligible for missions to low Earth orbit, the Moon, and eventually, Mars. When they graduate, they will join NASA’s active astronaut corps, advancing science aboard the International Space Station and supporting Artemis missions that will carry human exploration farther than ever before. 

During the class announcement at Johnson on Sept. 22, 2025, Center Director Vanessa Wyche celebrated the moment as a milestone for exploration. 

“Today is an exciting day for our nation and for all of humanity as we introduce NASA’s 2025 astronaut candidates — the next generation who will help us explore the Moon, Mars, and beyond,” Wyche said. “Each one of these candidates brings unique experiences and perspectives that reflect the diversity of America and the spirit of exploration that defines NASA.” 

Behind their new blue flight suits are years of preparation and stories as multifaceted as the missions they will one day support. 

Different Roads to the Same Horizon 

NASA’s new astronaut candidates greet the crowd for the first time at Johnson Space Center in Houston.NASA/James Blair

Some of the candidates built their careers in the air, where precision, communication, and teamwork were part of every mission. Former U.S. Navy pilot and test pilot Rebecca Lawler says that is exactly what drew her to NASA. 

“All of these people are coming from different disciplines and levels of expertise, and you’re all working together to get science to fly,” she said. “That’s what excites me most — bringing those experiences together as a team.” 

Imelda Muller, an anesthesiologist and former U.S. Navy undersea medical officer, said her experience supporting experimental diving teams taught her how people from different backgrounds can come together under one mission, something she sees echoed at NASA. 

Muller remembers looking up at the night sky as a kid, able to see almost every star on a clear night. Her grandfather worked on the Apollo program and used to share stories with her, and she says the mix of stargazing and imagining those missions inspired her dream of becoming an astronaut. 

Anna Menon, a biomedical engineer and former flight controller, has seen the human side of spaceflight from the ground and from space. She supported astronaut health aboard the space station from the Mission Control Center in Houston and served as a mission specialist and medical officer aboard SpaceX’s Polaris Dawn mission.

As more people venture into space, we have this incredible opportunity to learn how the human body changes in microgravity. That knowledge will help keep crews healthy as we go farther than ever before.

Anna Menon

NASA Astronaut Candidate

A Houston native, she discovered her passion for exploration in the fourth grade during a field trip to Johnson. “That experience lit a fire in me to want to be part of the space industry,” she said. 

The Language of Human Spaceflight 

NASA astronaut candidate Erin Overcash speaks during the class announcement ceremony at Johnson Space Center.NASA/James Blair

For the test pilots — including Adam Fuhrmann, Cameron Jones, Ben Bailey, and Erin Overcash — flight testing taught adaptability, composure, and the discipline to make quick decisions when it matters most. As Fuhrmann put it, it is about knowing when to lead and when to listen. 

In flight test, nothing happens alone. We work with incredible engineers and professionals to plan and execute complex missions. That teamwork translates perfectly to human spaceflight.

Adam Fuhrmann

NASA Astronaut Candidate

Every astronaut candidate will spend nearly two years learning spacecraft systems, practicing spacewalks in the Neutral Buoyancy Laboratory, flying T-38 jets, and studying geology, robotics, and survival training. 

As U.S. Army Chief Warrant Officer and helicopter test pilot Ben Bailey said, it is not one skill that matters most — it is the combination. 

“Each one is exciting on its own — flying, language training, spacewalks — but getting to do them all together, as a crew, that’s the best part,” Bailey said. 

During the event, current astronauts welcomed the new class and shared advice drawn from their own journeys in human spaceflight. “Thankfully, you will have some of the most talented, passionate instructors and an incredibly dedicated team here at NASA,” said NASA astronaut Chris Williams. “Some of the most special moments will come as you find how much you get to learn from each other.” 

From the International Space Station, NASA astronaut Zena Cardman encouraged the candidates to “learn everything you can, get to know each other, and enjoy the ride.” 

NASA astronaut Jonny Kim followed with a reminder every explorer carries forward: “The people sitting beside you now will become lifelong friends.” 

Explorers of the Golden Age 

The 2025 astronaut candidates with NASA leadership during their class announcement. NASA/James Blair

From geologist Lauren Edgar, who worked on the Curiosity Mars Rover and the Artemis III science team, to engineers like Yuri Kubo, who completed seven NASA internships, and Katherine Spies, who designed and tested flight systems that make exploration possible, each brings a layer of expertise to the agency’s future on the Moon and beyond. 

I’ve always loved figuring out how things work and finding ways to make them better. That’s what drew me to engineering, and it’s what keeps me excited about exploration.

Yuri Kubo

NASA Astronaut Candidate

A New Era Begins 

NASA’s astronaut candidate class pose for a selfie during their first week at Johnson Space Center. NASA

At the announcement ceremony, NASA Flight Operations Director Norm Knight said, “Every lesson learned aboard station has paved the way for where we’re headed next – to the Moon, this time to stay, and on to Mars. We have a group of individuals who are not only exceptional, but who will be inspirational for the United States of America and for our planet.”  

Together, the astronaut candidates reflect the spirit of Artemis — curiosity, courage, and continuous learning as humanity prepares for its next giant leap. 

About the AuthorSumer Loggins

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Details Last Updated Nov 25, 2025 Related Terms

• Johnson Space Center
• Candidate Astronauts
• General

Explore More 5 min read NASA Johnson Celebrates 25 Years of Humanity in Space  Article 1 week ago 3 min read Aaisha Ali: From Marine Biology to the Artemis Control Room  Article 5 months ago 4 min read Mark Cavanaugh: Integrating Safety into the Orion Spacecraft  Article 4 months ago Keep Exploring Discover More Topics From NASA

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Climate Change

Solar System

Explore This Section

1. Science
2. Science Activation
3. New NASA HEAT and My NASA Data…

• Overview
• Learning Resources
• Science Activation Teams
• SME Map
• Opportunities
• More

 

3 min read

New NASA HEAT and My NASA Data Resources Bring Space Weather Science into Classrooms Space weather is an important part of the Sun’s interaction with the space around it. Scientists called heliophysicists study these phenomena to help us better understand how and why it happens, and the effects it can have on the rest of our solar system.

As the Sun enters a period of heightened activity, students now have a new way to explore its powerful effects on Earth and space. NASA’s Heliophysics Education Activation Team (NASA HEAT), in collaboration with My NASA Data, has released a new set of classroom resources that invite students and educators to engage with real NASA mission data to study space weather phenomena in real time.

Hands-On Learning with Real NASA Data

Developed as part of NASA HEAT’s mission to increase awareness and understanding of heliophysics, these new materials help learners connect directly with the science of the Sun and its influence on the solar system. The resources include:

• Lesson plans and mini-lessons for quick classroom engagement
• Interactive web-based tools that let students visualize and analyze real mission data
• StoryMaps, longer-form digital experiences that guide multi-day investigations into space weather events

These activities draw from data collected by NASA’s Parker Solar Probe, the Solar Dynamics Observatory (SDO), and the European Space Agency’s Solar Orbiter, among others, giving students a chance to explore how scientists monitor and study the Sun’s behavior.

Understanding Space Weather

Space weather is driven by the Sun’s activity – its bursts of energy, radiation, and plasma that stream through space. When these events interact with Earth’s magnetic field, they can produce stunning auroras but also cause radio disruptions, satellite interference, and power grid issues.

By engaging with these new resources, students can learn how NASA monitors and predicts these solar phenomena and why studying space weather is essential for keeping astronauts, spacecraft, and technology safe.

Learning During Solar Maximum

This launch comes at a perfect time. In late 2024, the Sun entered solar maximum, the most active part of its 11-year cycle, providing students a front-row seat to increased solar flares, sunspots, and coronal mass ejections. The new NASA HEAT and My NASA Data resources encourage educators to use this unique moment to deepen classroom discussions on magnetism, energy, and the Sun–Earth connection through observation and data-driven exploration.

Inspiring Future Scientists

Both NASA HEAT and My NASA Data, part of GLOBE Mission Earth (Global Learning and Observations to Benefit the Environment), are part of the NASA Science Activation (SciAct) program, which connects learners of all ages with authentic NASA science content, experts, and experiences. By bringing real-world data and current scientific phenomena into the classroom, these new tools empower students to think like scientists and see themselves as contributors to ongoing discovery.

Explore the New Resources

• NASA HEAT – Framework for Heliophysics Education
• My NASA Data – Space Weather

Share

Details Last Updated Nov 24, 2025 EditorNASA Science Editorial Team Related Terms

• Science Activation
• For Kids and Students
• Grades 5 – 8 for Educators
• Heliophysics

Explore More 3 min read 10 Years of Students Helping NASA Grow Space Food with Growing Beyond Earth Article 3 days ago 6 min read NASA Fuels Discovery from Earth to Sky: One Crayon at a Time Article 4 days ago 3 min read View Interstellar Comet 3I/ATLAS Through NASA’s Multiple Lenses  Article 5 days ago Keep Exploring Discover More Topics From NASA James Webb Space Telescope

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1. Science
2. Science Activation
3. New NASA HEAT and My NASA Data…

• Overview
• Learning Resources
• Science Activation Teams
• SME Map
• Opportunities
• More

 

3 min read

New NASA HEAT and My NASA Data Resources Bring Space Weather Science into Classrooms Space weather is an important part of the Sun’s interaction with the space around it. Scientists called heliophysicists study these phenomena to help us better understand how and why it happens, and the effects it can have on the rest of our solar system.

As the Sun enters a period of heightened activity, students now have a new way to explore its powerful effects on Earth and space. NASA’s Heliophysics Education Activation Team (NASA HEAT), in collaboration with My NASA Data, has released a new set of classroom resources that invite students and educators to engage with real NASA mission data to study space weather phenomena in real time.

Hands-On Learning with Real NASA Data

Developed as part of NASA HEAT’s mission to increase awareness and understanding of heliophysics, these new materials help learners connect directly with the science of the Sun and its influence on the solar system. The resources include:

• Lesson plans and mini-lessons for quick classroom engagement
• Interactive web-based tools that let students visualize and analyze real mission data
• StoryMaps, longer-form digital experiences that guide multi-day investigations into space weather events

These activities draw from data collected by NASA’s Parker Solar Probe, the Solar Dynamics Observatory (SDO), and the European Space Agency’s Solar Orbiter, among others, giving students a chance to explore how scientists monitor and study the Sun’s behavior.

Understanding Space Weather

Space weather is driven by the Sun’s activity – its bursts of energy, radiation, and plasma that stream through space. When these events interact with Earth’s magnetic field, they can produce stunning auroras but also cause radio disruptions, satellite interference, and power grid issues.

By engaging with these new resources, students can learn how NASA monitors and predicts these solar phenomena and why studying space weather is essential for keeping astronauts, spacecraft, and technology safe.

Learning During Solar Maximum

This launch comes at a perfect time. In late 2024, the Sun entered solar maximum, the most active part of its 11-year cycle, providing students a front-row seat to increased solar flares, sunspots, and coronal mass ejections. The new NASA HEAT and My NASA Data resources encourage educators to use this unique moment to deepen classroom discussions on magnetism, energy, and the Sun–Earth connection through observation and data-driven exploration.

Inspiring Future Scientists

Both NASA HEAT and My NASA Data, part of GLOBE Mission Earth (Global Learning and Observations to Benefit the Environment), are part of the NASA Science Activation (SciAct) program, which connects learners of all ages with authentic NASA science content, experts, and experiences. By bringing real-world data and current scientific phenomena into the classroom, these new tools empower students to think like scientists and see themselves as contributors to ongoing discovery.

Explore the New Resources

• NASA HEAT – Framework for Heliophysics Education
• My NASA Data – Space Weather

Share

Details Last Updated Nov 24, 2025 EditorNASA Science Editorial Team Related Terms

• Science Activation
• For Kids and Students
• Grades 5 – 8 for Educators
• Heliophysics

Explore More 3 min read 10 Years of Students Helping NASA Grow Space Food with Growing Beyond Earth Article 3 days ago 6 min read NASA Fuels Discovery from Earth to Sky: One Crayon at a Time Article 4 days ago 3 min read View Interstellar Comet 3I/ATLAS Through NASA’s Multiple Lenses  Article 5 days ago Keep Exploring Discover More Topics From NASA James Webb Space Telescope

Webb is the premier observatory of the next decade, serving thousands of astronomers worldwide. It studies every phase in the…

Perseverance Rover

This rover and its aerial sidekick were assigned to study the geology of Mars and seek signs of ancient microbial…

Parker Solar Probe

On a mission to “touch the Sun,” NASA’s Parker Solar Probe became the first spacecraft to fly through the corona…

Juno

NASA’s Juno spacecraft entered orbit around Jupiter in 2016, the first explorer to peer below the planet’s dense clouds to…

5 min read

NASA, NOAA Rank 2025 Ozone Hole as 5th Smallest Since 1992 Earth (ESD)

• Earth
• Explore
• Science at Work
• Multimedia
• Data
• For Researchers
• About Us

While continental in scale, the ozone hole over the Antarctic was small in 2025 compared to previous years and remains on track to recover later this century, NASA and the National Oceanic and Atmospheric Administration (NOAA) reported. The hole this year was the fifth smallest since 1992, the year a landmark international agreement to phase out ozone-depleting chemicals began to take effect.

At the height of this year’s depletion season from Sept. 7 through Oct. 13, the average extent of the ozone hole was about 7.23 million square miles (18.71 million square kilometers) — that’s twice the area of the contiguous United States. The 2025 ozone hole is already breaking up, nearly three weeks earlier than usual during the past decade.

This map shows the size and shape of the ozone hole over the South Pole on the day of its 2025 maximum extent. Moderate ozone losses (orange) are visible amid areas of more potent ozone losses (red). Scientists describe the ozone “hole” as the area in which ozone concentrations drop below the historical threshold of 220 Dobson units.NASA Earth Observatory image by Lauren Dauphin, using data courtesy of NASA Ozone Watch and GEOS-5 data from the Global Modeling and Assimilation Office at NASA GSFC

The hole reached its greatest one-day extent for the year on Sept. 9 at 8.83 million square miles (22.86 million square kilometers). It was about 30% smaller than the largest hole ever observed, which occurred in 2006, and had an average area of 10.27 million square miles (26.60 million square kilometers).

“As predicted, we’re seeing ozone holes trending smaller in area than they were in the early 2000s,” said Paul Newman, a senior scientist with the University of Maryland, Baltimore County, and leader of the ozone research team at NASA’s Goddard Space Flight Center in Greenbelt, Maryland. “They’re forming later in the season and breaking up earlier. But we still have a long way to go before it recovers to 1980s levels.”

NASA and NOAA scientists say this year’s monitoring showed that controls on ozone-depleting chemical compounds established by the Montreal Protocol and subsequent amendments are driving the gradual recovery of the ozone layer in the stratosphere, which remains on track to recover fully later this century.

The ozone-rich layer acts as a planetary sunscreen that helps shield life from harmful ultraviolet (UV) radiation from the Sun. It is located in the stratosphere, which is found between 7 and 31 miles above the Earth’s surface. Reduced ozone allows more UV rays to reach the surface, resulting in crop damage as well as increased cases of skin cancer and cataracts, among other adverse health impacts.

The ozone depletion process starts when human-made compounds containing chlorine and bromine rise high into the stratosphere miles above Earth’s surface. Freed from their molecular bonds by the more intense UV radiation, the chlorine and bromine-containing molecules then participate in reactions that destroy ozone molecules. Chlorofluorocarbons and other ozone-depleting compounds were once widely used in aerosol sprays, foams, air conditioners, and refrigerators. The chlorine and bromine from these compounds can linger in the atmosphere for decades to centuries.

“Since peaking around the year 2000, levels of ozone-depleting substances in the Antarctic stratosphere have declined by about a third, relative to pre-ozone-hole levels,” said Stephen Montzka, a senior scientist with NOAA’s Global Monitoring Laboratory. 

As part of the 1987 Montreal Protocol, countries agreed to replace ozone-depleting substances with less harmful alternatives.

“This year’s hole would have been more than one million square miles larger if there was still as much chlorine in the stratosphere as there was 25 years ago,” Newman said.

Still, the now-banned chemicals persist in old products like building insulation and in landfills. As emissions from those legacy uses taper off over time, projections show the ozone hole over the Antarctic recovering around the late 2060s.

NASA and NOAA previously ranked ozone hole severity using a time frame dating back to 1979, when scientists began tracking Antarctic ozone levels with satellites. Using that longer record, this year’s hole area ranked 14th smallest over 46 years of observations.

Factors like temperature, weather, and the strength of the wind encircling Antarctica known as the polar vortex also influence ozone levels from year to year. A weaker-than-normal polar vortex this August helped keep temperatures above average and likely contributed to a smaller ozone hole, said Laura Ciasto, a meteorologist with NOAA’s Climate Prediction Center.

Researchers monitor the ozone layer around the world using instruments on NASA’s Aura satellite, the NOAA-20 and NOAA-21 satellites, and the Suomi National Polar-orbiting Partnership satellite, jointly operated by NASA and NOAA.

NOAA scientists also use instruments carried on weather balloons and upward-looking surface-based instruments to measure stratospheric ozone directly above the South Pole Atmospheric Baseline Observatory. Balloon data showed that the ozone concentration reached its lowest value of 147 Dobson Units this year on Oct. 6. The lowest value ever recorded over the South Pole was 92 Dobson Units in October 2006.

NOAA scientists launch a weather balloon carrying an ozonesonde near the South Pole in September 2025.Simeon Bash/IceCube – courtesy of NOAA

The Dobson Unit is a measurement that indicates the total number of ozone molecules present throughout the atmosphere above a certain location. A measurement of 100 Dobson Units corresponds to a layer of pure ozone 1 millimeter thick — about as thick as a dime — at standard temperature and pressure conditions.

View the latest status of the ozone layer over the Antarctic with NASA’s ozone watch.

By Sally Younger

NASA’s Earth Science News Team

News Media Contacts:

Elizabeth Vlock
NASA Headquarters, Washington
202-358-1600
elizabeth.a.vlock@nasa.gov

Peter Jacobs
NASA’s Goddard Space Flight Center, Greenbelt, Md.
301-286-3308
peter.jacobs@nasa.gov

Theo Stein
NOAA Communications
303-819-7409
theo.stein@noaa.gov

Share

Details Last Updated Nov 25, 2025 Related Terms

• Earth
• Earth’s Atmosphere
• Goddard Space Flight Center
• Ozone Layer

Explore More 2 min read Hubble Seeks Clusters in ‘Lost Galaxy’ Article 4 days ago 4 min read NASA’s TESS Spacecraft Triples Size of Pleiades Star Cluster

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5 min read

NASA, NOAA Rank 2025 Ozone Hole as 5th Smallest Since 1992 Earth (ESD)

• Earth
• Explore
• Science at Work
• Multimedia
• Data
• For Researchers
• About Us

While continental in scale, the ozone hole over the Antarctic was small in 2025 compared to previous years and remains on track to recover later this century, NASA and the National Oceanic and Atmospheric Administration (NOAA) reported. The hole this year was the fifth smallest since 1992, the year a landmark international agreement to phase out ozone-depleting chemicals began to take effect.

At the height of this year’s depletion season from Sept. 7 through Oct. 13, the average extent of the ozone hole was about 7.23 million square miles (18.71 million square kilometers) — that’s twice the area of the contiguous United States. The 2025 ozone hole is already breaking up, nearly three weeks earlier than usual during the past decade.

This map shows the size and shape of the ozone hole over the South Pole on the day of its 2025 maximum extent. Moderate ozone losses (orange) are visible amid areas of more potent ozone losses (red). Scientists describe the ozone “hole” as the area in which ozone concentrations drop below the historical threshold of 220 Dobson units.NASA Earth Observatory image by Lauren Dauphin, using data courtesy of NASA Ozone Watch and GEOS-5 data from the Global Modeling and Assimilation Office at NASA GSFC

The hole reached its greatest one-day extent for the year on Sept. 9 at 8.83 million square miles (22.86 million square kilometers). It was about 30% smaller than the largest hole ever observed, which occurred in 2006, and had an average area of 10.27 million square miles (26.60 million square kilometers).

“As predicted, we’re seeing ozone holes trending smaller in area than they were in the early 2000s,” said Paul Newman, a senior scientist with the University of Maryland, Baltimore County, and leader of the ozone research team at NASA’s Goddard Space Flight Center in Greenbelt, Maryland. “They’re forming later in the season and breaking up earlier. But we still have a long way to go before it recovers to 1980s levels.”

NASA and NOAA scientists say this year’s monitoring showed that controls on ozone-depleting chemical compounds established by the Montreal Protocol and subsequent amendments are driving the gradual recovery of the ozone layer in the stratosphere, which remains on track to recover fully later this century.

The ozone-rich layer acts as a planetary sunscreen that helps shield life from harmful ultraviolet (UV) radiation from the Sun. It is located in the stratosphere, which is found between 7 and 31 miles above the Earth’s surface. Reduced ozone allows more UV rays to reach the surface, resulting in crop damage as well as increased cases of skin cancer and cataracts, among other adverse health impacts.

The ozone depletion process starts when human-made compounds containing chlorine and bromine rise high into the stratosphere miles above Earth’s surface. Freed from their molecular bonds by the more intense UV radiation, the chlorine and bromine-containing molecules then participate in reactions that destroy ozone molecules. Chlorofluorocarbons and other ozone-depleting compounds were once widely used in aerosol sprays, foams, air conditioners, and refrigerators. The chlorine and bromine from these compounds can linger in the atmosphere for decades to centuries.

“Since peaking around the year 2000, levels of ozone-depleting substances in the Antarctic stratosphere have declined by about a third, relative to pre-ozone-hole levels,” said Stephen Montzka, a senior scientist with NOAA’s Global Monitoring Laboratory. 

As part of the 1987 Montreal Protocol, countries agreed to replace ozone-depleting substances with less harmful alternatives.

“This year’s hole would have been more than one million square miles larger if there was still as much chlorine in the stratosphere as there was 25 years ago,” Newman said.

Still, the now-banned chemicals persist in old products like building insulation and in landfills. As emissions from those legacy uses taper off over time, projections show the ozone hole over the Antarctic recovering around the late 2060s.

NASA and NOAA previously ranked ozone hole severity using a time frame dating back to 1979, when scientists began tracking Antarctic ozone levels with satellites. Using that longer record, this year’s hole area ranked 14th smallest over 46 years of observations.

Factors like temperature, weather, and the strength of the wind encircling Antarctica known as the polar vortex also influence ozone levels from year to year. A weaker-than-normal polar vortex this August helped keep temperatures above average and likely contributed to a smaller ozone hole, said Laura Ciasto, a meteorologist with NOAA’s Climate Prediction Center.

Researchers monitor the ozone layer around the world using instruments on NASA’s Aura satellite, the NOAA-20 and NOAA-21 satellites, and the Suomi National Polar-orbiting Partnership satellite, jointly operated by NASA and NOAA.

NOAA scientists also use instruments carried on weather balloons and upward-looking surface-based instruments to measure stratospheric ozone directly above the South Pole Atmospheric Baseline Observatory. Balloon data showed that the ozone concentration reached its lowest value of 147 Dobson Units this year on Oct. 6. The lowest value ever recorded over the South Pole was 92 Dobson Units in October 2006.

NOAA scientists launch a weather balloon carrying an ozonesonde near the South Pole in September 2025.Simeon Bash/IceCube – courtesy of NOAA

The Dobson Unit is a measurement that indicates the total number of ozone molecules present throughout the atmosphere above a certain location. A measurement of 100 Dobson Units corresponds to a layer of pure ozone 1 millimeter thick — about as thick as a dime — at standard temperature and pressure conditions.

View the latest status of the ozone layer over the Antarctic with NASA’s ozone watch.

By Sally Younger

NASA’s Earth Science News Team

News Media Contacts:

Elizabeth Vlock
NASA Headquarters, Washington
202-358-1600
elizabeth.a.vlock@nasa.gov

Peter Jacobs
NASA’s Goddard Space Flight Center, Greenbelt, Md.
301-286-3308
peter.jacobs@nasa.gov

Theo Stein
NOAA Communications
303-819-7409
theo.stein@noaa.gov

Share

Details Last Updated Nov 25, 2025 Related Terms

• Earth
• Earth’s Atmosphere
• Goddard Space Flight Center
• Ozone Layer

Explore More 2 min read Hubble Seeks Clusters in ‘Lost Galaxy’ Article 4 days ago 4 min read NASA’s TESS Spacecraft Triples Size of Pleiades Star Cluster

Astronomers have revolutionized our understanding of a collection of stars in the northern sky called…

Article 5 days ago 5 min read Webb First to Show 4 Dust Shells ‘Spiraling’ Apep, Limits Long Orbit Article 6 days ago Keep Exploring Discover More Topics From NASA Earth

Your home. Our Mission. And the one planet that NASA studies more than any other.

Explore Earth Science

Earth Science at Work

NASA Earth Science helps Americans respond to challenges and societal needs — such as wildland fires, hurricanes, and water supplies…

Climate Change

NASA is a global leader in studying Earth’s changing climate.

2 min read

NASA Citizen Science Toolkit for Librarians Librarians: NASA Citizen Science has something for you!

Our new Toolkit for Librarians can help you share NASA citizen science opportunities with your patrons and community members. Rural and urban libraries, informal educators, youth group leaders, and retirement community coordinators can all benefit from this resource. Together, we can open the door for more people to join the fun, learning, and thrill of doing NASA science.  

The toolkit prepares a program leader to lead a NASA Science event for people ages 8 and up. The toolkit includes: 

• A guide to help you prepare for the event, from choosing and equipping the space, to becoming familiar with the citizen science project that will be the focus of the event
• An editable 8.5” by 11” poster to advertise your event
• A model agenda to follow during your event
• A handout for you and your participants to help you explore NASA-sponsored citizen science project opportunities 

The toolkit creators, Sarah Kirn (Participatory Science Strategist, NASA, from the Gulf of Maine Research Institute) and Kara Reiman (librarian), together with NASA’s Citizen Science Officer Marc Kuchner, also recorded a video walk-through of this Toolkit. 

“I appreciate this so much!” said one participant. “I have started Citizen Science Kits for circulation over this past year and am excited to share new opportunities with our patrons!”

“Living in a very rural and primarily native community, the kids here are limited with their nearby opportunities, so sharing this with them is a huge win…” said another.

Which NASA citizen project is best for you? You’ll find all these projects at science.nasa.gov/citizen-science, and you’ll find more resources like this in our Toolkit for Librarians! Sarah Kirn, GMRI + Marc Kuchner, NASA Learn More and Get Involved

NASA Citizen Science Toolkit for Librarians

Please share this toolkit – or use it yourself – to invite more people to do NASA science with us – who knows what they will discover?!

Facebook logo @nasascience_

@nasascience_

Instagram logo @nasascience_

Linkedin logo @nasascience_

Share

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Last Updated

Nov 24, 2025

Related Terms

• Citizen Science

Explore More

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NASA Citizen Science Toolkit for Librarians Librarians: NASA Citizen Science has something for you!

Our new Toolkit for Librarians can help you share NASA citizen science opportunities with your patrons and community members. Rural and urban libraries, informal educators, youth group leaders, and retirement community coordinators can all benefit from this resource. Together, we can open the door for more people to join the fun, learning, and thrill of doing NASA science.  

The toolkit prepares a program leader to lead a NASA Science event for people ages 8 and up. The toolkit includes: 

• A guide to help you prepare for the event, from choosing and equipping the space, to becoming familiar with the citizen science project that will be the focus of the event
• An editable 8.5” by 11” poster to advertise your event
• A model agenda to follow during your event
• A handout for you and your participants to help you explore NASA-sponsored citizen science project opportunities 

The toolkit creators, Sarah Kirn (Participatory Science Strategist, NASA, from the Gulf of Maine Research Institute) and Kara Reiman (librarian), together with NASA’s Citizen Science Officer Marc Kuchner, also recorded a video walk-through of this Toolkit. 

“I appreciate this so much!” said one participant. “I have started Citizen Science Kits for circulation over this past year and am excited to share new opportunities with our patrons!”

“Living in a very rural and primarily native community, the kids here are limited with their nearby opportunities, so sharing this with them is a huge win…” said another.

Which NASA citizen project is best for you? You’ll find all these projects at science.nasa.gov/citizen-science, and you’ll find more resources like this in our Toolkit for Librarians! Sarah Kirn, GMRI + Marc Kuchner, NASA Learn More and Get Involved

NASA Citizen Science Toolkit for Librarians

Please share this toolkit – or use it yourself – to invite more people to do NASA science with us – who knows what they will discover?!

Facebook logo @nasascience_

@nasascience_

Instagram logo @nasascience_

Linkedin logo @nasascience_

Share

• 
  
  
• 
  
  
• 
  
  
• 
  
  

Details

Last Updated

Nov 24, 2025

Related Terms

• Citizen Science

Explore More

2 min read Catch a Comet Using Early Data from the Vera Rubin Observatory

Join the Rubin Comet Catchers project, and help scientists discover comets and other active objects…

Article


3 days ago

3 min read New Citizen Science Proposals Funded in 2025

NASA has selected 10 new citizen science proposals for funding in 2025. These selections provide…

Article


4 days ago

1 min read Help Map the Moon’s Molten Flows!

Article


2 months ago

JAXA/Kimiya Yui

JAXA (Japan Aerospace Exploration Agency) astronaut Kimiya Yui captured this photo of southern Europe and the northwestern Mediterranean coast from the International Space Station as it orbited 261 miles above Earth on Aug. 30, 2025. At left, the Po Valley urban corridor in Italy shines with the metropolitan areas of Milan and Turin and their surrounding suburbs.

Crew members aboard the orbital lab have produced hundreds of thousands of images of the land, oceans, and atmosphere of Earth, and even of the Moon through Crew Earth Observations. Their photographs of Earth record how the planet changes over time due to human activity and natural events. This allows scientists to monitor disasters and direct response on the ground and study a number of phenomena, from the movement of glaciers to urban wildlife.

Image credit: JAXA/Kimiya Yui

JAXA/Kimiya Yui

JAXA (Japan Aerospace Exploration Agency) astronaut Kimiya Yui captured this photo of southern Europe and the northwestern Mediterranean coast from the International Space Station as it orbited 261 miles above Earth on Aug. 30, 2025. At left, the Po Valley urban corridor in Italy shines with the metropolitan areas of Milan and Turin and their surrounding suburbs.

Crew members aboard the orbital lab have produced hundreds of thousands of images of the land, oceans, and atmosphere of Earth, and even of the Moon through Crew Earth Observations. Their photographs of Earth record how the planet changes over time due to human activity and natural events. This allows scientists to monitor disasters and direct response on the ground and study a number of phenomena, from the movement of glaciers to urban wildlife.

Image credit: JAXA/Kimiya Yui

The atmospheric glow blankets southern Europe and the northwestern Mediterranean coast, outlined by city lights. At left, the Po Valley urban corridor in Italy shines with the metropolitan areas of Milan and Turin and their surrounding suburbs.

To see Earth from space is to be forever changed by the view. Since Alan Shepard became the first American to lay eyes on our home planet from above, countless NASA astronauts have described feeling awed by the astonishing sight and a profound shift in perspective that followed.

NASA astronaut Matthew Dominick points his camera through a cupola window as the International Space Station orbits 262 miles above the Atlantic Ocean off the coast of Africa.NASA

This unique experience is known as the overview effect – a term coined in 1987 by space philosopher and author Frank White in a book of the same name. The phenomenon creates powerful changes in the way astronauts think about Earth and life and can be particularly strong for those who lived and worked aboard the International Space Station during its 25 years of continuous human presence. The orbiting laboratory’s cupola module, equipped with seven windows looking down on Earth, provides the perfect place for observation and reflection.

NASA astronaut Jessica Watkins is pictured looking out from the International Space Station’s “window to the world” – the cupola. Astronauts use the seven-windowed observation module to monitor the arrival of spacecrafts at the orbiting laboratory and view the Earth below. NASA

As Artemis II Mission Specialist Christina Koch explained:

“The overview effect is when you’re looking through the cupola and you see the Earth as it exists with the whole universe in the background. You see the thin blue line of the atmosphere, and then when you’re on the dark side of the Earth, you actually see this very thin green line that shows you where the atmosphere is. What you realize is every single person that you know is sustained and inside of that green line and everything else outside of it is completely inhospitable. You don’t see borders, you don’t see religious lines, you don’t see political boundaries. All you see is Earth and you see that we are way more alike than we are different.”

Koch’s Artemis II crewmate, NASA astronaut Victor Glover, said the overview effect’s potency is closely tied to the “sea level effect” – humanity’s shared experience on Earth. “You come back to sea level, and then you have a choice,” he explained. “Are you going to try to live your life a little differently? Are you going to really choose to be a member of this community of Earth?”

NASA astronaut Don Pettit, Expedition 30 flight engineer, is pictured in a window of the cupola of the International Space Station, backdropped by Earth’s horizon and the blackness of space. NASA

Many astronauts emphasize the importance of unity after experiencing the overview effect. “You see that it’s a single planet with a shared atmosphere. It’s our shared place in this universe,” said former NASA astronaut Bob Behnken. “I think that perspective, as we go through things like the pandemic or we see the challenges across our nation or across the world, we recognize that we all face them together.”

Seeing the Earth from space can also change their concept of home. Former NASA astronaut Nicole Stott recalls wanting to see her home state of Florida during her first mission to the International Space Station. “Finally, we were flying over Florida. I wanted to go to the window and see it, and then realized somewhere down the line that I wasn’t looking at Florida that same way anymore,” she said. “I still wanted to see Florida, but Florida had just become this special part of home, which is Earth. We’re all earthlings.”

The sun shines above Earth’s horizon as the space station orbits 264 miles above the Canadian province of Quebec. NASA

For some astronauts, their perspective shift inspired them to make changes on the ground. “I think if you’re not a conservationist before you go to space, you’re at least partly a conservationist when you come back. Because when you see how thin that atmosphere is, that protective layer that we have here, you think, wow, we really have to take care of this because it does look so fragile from space,” said retired NASA astronaut Mike Foreman.

Others hope to share the overview effect with more people. “That perspective helps you grow. It has really inspired me to try to get more people this experience and to get a permanent foothold in the stars for our species,” said former NASA astronaut Jack Fischer. “I want to do everything I possibly can to help the human species, humanity as a whole, go further and grow and evolve like I know they’re capable of.”

An Earth observation taken through cupola windows by the Expedition 39 crew. Portions of the International Space Station are in view. NASA

Future crews to the orbiting laboratory can look forward to a similar experience. “In that instant, when you’re overwhelmed with that vista, when your eyes see nothing but the beauty of the Earth – every single crew member that I brought in [the cupola] for that exposure, cried,” said retired NASA astronaut T.J. Creamer. “It is heart stopping. It is soul pounding. It is breathtaking.”

For more astronaut perspectives from the International Space Station, watch “Down to Earth” on NASA+.

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