The forces of rotation caused red hot masses of stones to be torn away from the Earth and to be thrown into the ether, and this is the origin of the stars.

— Anaxagoras 428 BC

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The best space pictures of 2025, from supernovae to moon landings

New Scientist Space - Space Headlines - Tue, 12/23/2025 - 9:00am
The year’s most memorable moments from astronomy and space exploration include a double-detonating supernova, a private moon landing and a stunning lunar eclipse
Categories: Astronomy

NASA’s Hubble Reveals Largest Found Chaotic Birthplace of Planets

NASA - Breaking News - Tue, 12/23/2025 - 9:00am
Explore Hubble

4 Min Read NASA’s Hubble Reveals Largest Found Chaotic Birthplace of Planets

Astronomers using NASA’s Hubble Space Telescope have imaged the largest protoplanetary disk ever observed circling a young star. For the first time in visible light, Hubble has revealed the disk is unexpectedly chaotic and turbulent, with wisps of material stretching much farther above and below the disk than astronomers have seen in any similar system. Strangely, more extended filaments are only visible on one side of the disk. The findings, which published Tuesday in The Astrophysical Journal, mark a new milestone for Hubble and shed light on how planets may form in extreme environments, as NASA’s missions lead humanity’s exploration of the universe and our place in it.

Located roughly 1,000 light-years from Earth, IRAS 23077+6707, nicknamed “Dracula’s Chivito,” spans nearly 400 billion miles — 40 times the diameter of our solar system to the outer edge of the Kuiper Belt of cometary bodies. The disk obscures the young star within it, which scientists believe may be either a hot, massive star, or a pair of stars. And the enormous disk is not only the largest known planet-forming disk; it’s also shaping up to be one of the most unusual.

“The level of detail we’re seeing is rare in protoplanetary disk imaging, and these new Hubble images show that planet nurseries can be much more active and chaotic than we expected,” said lead author Kristina Monsch of the Center for Astrophysics | Harvard & Smithsonian (CfA). “We’re seeing this disk nearly edge-on and its wispy upper layers and asymmetric features are especially striking. Both Hubble and NASA’s James Webb Space Telescope have glimpsed similar structures in other disks, but IRAS 23077+6707 provides us with an exceptional perspective — allowing us to trace its substructures in visible light at an unprecedented level of detail. This makes the system a unique, new laboratory for studying planet formation and the environments where it happens.”

The nickname “Dracula’s Chivito” playfully reflects the heritage of its researchers—one from Transylvania and another from Uruguay, where the national dish is a sandwich called a chivito. The edge-on disk resembles a hamburger, with a dark central lane flanked by glowing top and bottom layers of dust and gas.

This Hubble Space Telescope image shows the largest planet-forming disk ever observed around a young star. It spans nearly 400 billion miles — 40 times the diameter of our solar system. Image: NASA, ESA, STScI, Kristina Monsch (CfA); Image Processing: Joseph DePasquale (STScI) Puzzling asymmetry

The impressive height of these features wasn’t the only thing that captured the attention of scientists. The new images revealed that vertically imposing filament-like features appear on just one side of the disk, while the other side appears to have a sharp edge and no visible filaments. This peculiar, lopsided structure suggests that dynamic processes, like the recent infall of dust and gas, or interactions with its surroundings, are shaping the disk.

“We were stunned to see how asymmetric this disk is,” said co-investigator Joshua Bennett Lovell, also an astronomer at the CfA. “Hubble has given us a front row seat to the chaotic processes that are shaping disks as they build new planets — processes that we don’t yet fully understand but can now study in a whole new way.”

All planetary systems form from disks of gas and dust encircling young stars. Over time, the gas accretes onto the star, and planets emerge from the remaining material. IRAS 23077+6707 may represent a scaled-up version of our early solar system, with a disk mass estimated at 10 to 30 times that of Jupiter — ample material for forming multiple gas giants. This, plus the new findings, makes it an exceptional case for studying the birth of planetary systems.

“In theory, IRAS 23077+6707 could host a vast planetary system,” said Monsch. “While planet formation may differ in such massive environments, the underlying processes are likely similar. Right now, we have more questions than answers, but these new images are a starting point for understanding how planets form over time and in different environments.”

Credit: NASA’s Goddard Space Flight Center; Lead Producer: Paul Morris

The Hubble Space Telescope has been operating for over three decades and continues to make ground-breaking discoveries that shape our fundamental understanding of the universe. Hubble is a project of international cooperation between NASA and ESA (European Space Agency). NASA’s Goddard Space Flight Center in Greenbelt, Maryland, manages the telescope and mission operations. Lockheed Martin Space, based in Denver, also supports mission operations at Goddard. The Space Telescope Science Institute in Baltimore, which is operated by the Association of Universities for Research in Astronomy, conducts Hubble science operations for NASA.

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Related Images & Videos

Dracula’s Chivito (IRAS 23077+6707)

This Hubble Space Telescope image shows the largest planet-forming disk ever observed around a young star. It spans nearly 400 billion miles — 40 times the diameter of our solar system.



Dracula’s Chivito (IRAS 23077+6707) Compass Image

Image of Dracula’s Chivito captured by Hubble’s WFC3 instrument, with compass arrows, scale bar, and color key for reference.



Hubble Spots Giant Vampire Sandwich? Video

Dracula’s Chivito isn’t just the largest protoplanetary disk ever imaged, it’s also a window into how planets are born and how systems like our solar system may have formed.




Share

Details

Last Updated

Dec 23, 2025

Editor Andrea Gianopoulos Location NASA Goddard Space Flight Center Contact

Media

Claire Andreoli
NASA’s Goddard Space Flight Center
Greenbelt, Maryland
claire.andreoli@nasa.gov

Christine Pulliam
Space Telescope Science Institute
Baltimore, Maryland

Amy Oliver
Center for Astrophysics | Harvard & Smithsonian
Cambridge, Massachusetts

Related Terms

Related Links and Documents

Keep Exploring Discover More Topics From Hubble

Hubble Space Telescope

Since its 1990 launch, the Hubble Space Telescope has changed our fundamental understanding of the universe.


Hubble Science Highlights


Hubble Images


Hubble News

Categories: NASA

NASA’s Hubble Reveals Largest Found Chaotic Birthplace of Planets

NASA News - Tue, 12/23/2025 - 9:00am
Explore Hubble

4 Min Read NASA’s Hubble Reveals Largest Found Chaotic Birthplace of Planets

Astronomers using NASA’s Hubble Space Telescope have imaged the largest protoplanetary disk ever observed circling a young star. For the first time in visible light, Hubble has revealed the disk is unexpectedly chaotic and turbulent, with wisps of material stretching much farther above and below the disk than astronomers have seen in any similar system. Strangely, more extended filaments are only visible on one side of the disk. The findings, which published Tuesday in The Astrophysical Journal, mark a new milestone for Hubble and shed light on how planets may form in extreme environments, as NASA’s missions lead humanity’s exploration of the universe and our place in it.

Located roughly 1,000 light-years from Earth, IRAS 23077+6707, nicknamed “Dracula’s Chivito,” spans nearly 400 billion miles — 40 times the diameter of our solar system to the outer edge of the Kuiper Belt of cometary bodies. The disk obscures the young star within it, which scientists believe may be either a hot, massive star, or a pair of stars. And the enormous disk is not only the largest known planet-forming disk; it’s also shaping up to be one of the most unusual.

“The level of detail we’re seeing is rare in protoplanetary disk imaging, and these new Hubble images show that planet nurseries can be much more active and chaotic than we expected,” said lead author Kristina Monsch of the Center for Astrophysics | Harvard & Smithsonian (CfA). “We’re seeing this disk nearly edge-on and its wispy upper layers and asymmetric features are especially striking. Both Hubble and NASA’s James Webb Space Telescope have glimpsed similar structures in other disks, but IRAS 23077+6707 provides us with an exceptional perspective — allowing us to trace its substructures in visible light at an unprecedented level of detail. This makes the system a unique, new laboratory for studying planet formation and the environments where it happens.”

The nickname “Dracula’s Chivito” playfully reflects the heritage of its researchers—one from Transylvania and another from Uruguay, where the national dish is a sandwich called a chivito. The edge-on disk resembles a hamburger, with a dark central lane flanked by glowing top and bottom layers of dust and gas.

This Hubble Space Telescope image shows the largest planet-forming disk ever observed around a young star. It spans nearly 400 billion miles — 40 times the diameter of our solar system. Image: NASA, ESA, STScI, Kristina Monsch (CfA); Image Processing: Joseph DePasquale (STScI) Puzzling asymmetry

The impressive height of these features wasn’t the only thing that captured the attention of scientists. The new images revealed that vertically imposing filament-like features appear on just one side of the disk, while the other side appears to have a sharp edge and no visible filaments. This peculiar, lopsided structure suggests that dynamic processes, like the recent infall of dust and gas, or interactions with its surroundings, are shaping the disk.

“We were stunned to see how asymmetric this disk is,” said co-investigator Joshua Bennett Lovell, also an astronomer at the CfA. “Hubble has given us a front row seat to the chaotic processes that are shaping disks as they build new planets — processes that we don’t yet fully understand but can now study in a whole new way.”

All planetary systems form from disks of gas and dust encircling young stars. Over time, the gas accretes onto the star, and planets emerge from the remaining material. IRAS 23077+6707 may represent a scaled-up version of our early solar system, with a disk mass estimated at 10 to 30 times that of Jupiter — ample material for forming multiple gas giants. This, plus the new findings, makes it an exceptional case for studying the birth of planetary systems.

“In theory, IRAS 23077+6707 could host a vast planetary system,” said Monsch. “While planet formation may differ in such massive environments, the underlying processes are likely similar. Right now, we have more questions than answers, but these new images are a starting point for understanding how planets form over time and in different environments.”

Credit: NASA’s Goddard Space Flight Center; Lead Producer: Paul Morris

The Hubble Space Telescope has been operating for over three decades and continues to make ground-breaking discoveries that shape our fundamental understanding of the universe. Hubble is a project of international cooperation between NASA and ESA (European Space Agency). NASA’s Goddard Space Flight Center in Greenbelt, Maryland, manages the telescope and mission operations. Lockheed Martin Space, based in Denver, also supports mission operations at Goddard. The Space Telescope Science Institute in Baltimore, which is operated by the Association of Universities for Research in Astronomy, conducts Hubble science operations for NASA.

Facebook logo @NASAHubble

@NASAHubble

Instagram logo @NASAHubble

Related Images & Videos

Dracula’s Chivito (IRAS 23077+6707)

This Hubble Space Telescope image shows the largest planet-forming disk ever observed around a young star. It spans nearly 400 billion miles — 40 times the diameter of our solar system.



Dracula’s Chivito (IRAS 23077+6707) Compass Image

Image of Dracula’s Chivito captured by Hubble’s WFC3 instrument, with compass arrows, scale bar, and color key for reference.



Hubble Spots Giant Vampire Sandwich? Video

Dracula’s Chivito isn’t just the largest protoplanetary disk ever imaged, it’s also a window into how planets are born and how systems like our solar system may have formed.




Share

Details

Last Updated

Dec 23, 2025

Editor Andrea Gianopoulos Location NASA Goddard Space Flight Center Contact

Media

Claire Andreoli
NASA’s Goddard Space Flight Center
Greenbelt, Maryland
claire.andreoli@nasa.gov

Christine Pulliam
Space Telescope Science Institute
Baltimore, Maryland

Amy Oliver
Center for Astrophysics | Harvard & Smithsonian
Cambridge, Massachusetts

Related Terms

Related Links and Documents

Keep Exploring Discover More Topics From Hubble

Hubble Space Telescope

Since its 1990 launch, the Hubble Space Telescope has changed our fundamental understanding of the universe.


Hubble Science Highlights


Hubble Images


Hubble News

Categories: NASA

I Am Artemis: Grace Lauderdale

NASA - Breaking News - Tue, 12/23/2025 - 9:00am
3 Min Read I Am Artemis: Grace Lauderdale Grace Lauderdale, exploration project manager for the Training Systems Office at NASA's Johnson Space Center in Houston, sits inside the Orion Mission Simulator used for training the Artemis II crew and flight control team. Credits: NASA/Rad Sinyak

Listen to this audio excerpt from Grace Lauderdale, exploration project manager for the Training Systems Office at NASA Johnson:

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Your browser does not support the audio element.

In preparation for their mission around the Moon inside NASA’s Orion spacecraft, the Artemis II crew will spend countless hours training inside the Orion Mission Simulator. The simulator replicates what the crew will experience inside the spacecraft and allows the astronauts and flight controllers to rehearse every phase of the mission.

As the exploration project manager for the Training Systems Office at Johnson, Grace Lauderdale leads the team that develops and operates the Orion Mission Simulator at NASA’s Johnson Space Center in Houston, playing a key role in making sure astronauts and flight control teams are ready for the first crewed mission of the Artemis campaign.

"This simulator trains the flight control team and the crew all the way from launch to splashdown. Every button, every display, every view out the window is as lifelike as possible.”

Grace Lauderdale

Exploration Project Manager for the Training Systems Office at NASA Johnson

The simulator is more than a mock-up. It connects directly to Johnson’s Mission Control Center, sending real-time data, audio, and video — just like the spacecraft will during flight. That means the flight control team trains in parallel, seeing and hearing exactly what they would throughout the mission.

“One of our major goals is to make the data they see on their displays look like the real vehicle,” Lauderdale said. “We also simulate the near space and deep space networks, including all the communication delays. It’s all about realism.”

That realism is powered by a complex software system developed in collaboration with partners like Lockheed Martin. Lauderdale’s team works behind the scenes to ensure the simulator runs smoothly — writing code, troubleshooting issues, and even creating custom malfunctions to challenge the crew during training.

Grace Lauderdale, exploration project manager for the Training Systems Office at NASA’s Johnson Space Center in Houston, sits inside the Orion Mission Simulator used for training the Artemis II crew and flight control team.Credits: NASA/Rad Sinyak

To prepare astronauts for the unexpected, instructors work with Lauderdale’s team to simulate problems that could occur during the mission, some of which require creative solutions.

“There are times when the instructors will ask for malfunctions or capabilities that the sim doesn’t automatically do,” she said. “Part of our role is to come up with ways to make that happen.”

Her team plans, develops, and executes training scenarios in the Orion Mission Simulator across multiple Artemis missions, often simultaneously. “Currently, we’re planning for future crewed missions, developing Artemis III, and executing Artemis II,” she said.

The work is demanding, but deeply personal, according to Lauderdale.

“I’ve known I wanted to work at NASA since the seventh grade. Every class I took, the degree I earned — it was all to get here.”

Grace Lauderdale

Exploration Project Manager for the Training Systems Office at NASA Johnson

That passion shows in her leadership. Her team often works nights, weekends, and holidays to ensure the simulator is ready. During a recent 30-hour simulation, they spent days preparing, fixing memory issues, and ensuring the system wouldn’t crash. It didn’t.

“I’m very proud of my team,” she said. “They’ve put in countless hours of work to make sure this simulator reacts exactly as it would in the real mission.”

For Lauderdale, helping send astronauts around the Moon isn’t just a job—it’s a dream realized.

“Being part of getting us back to the Moon is very personal to me,” she said. “And I’m proud to be part of the team that will help get our astronauts there.”

Reid Wiseman and Victor Glover train for the Artemis II mission inside the Orion Mission Simulator at NASA’s Johnson Space Center in Houston. NASA/Bill Stafford About the AuthorErika Peters

Share Details Last Updated Dec 22, 2025 Related Terms Explore More 3 min read Get In, We’re Going Moonbound: Meet NASA’s Artemis Closeout Crew Article 6 days ago 4 min read Artemis II Flight Crew, Teams Conduct Demonstration Ahead of Launch Article 6 days ago 6 min read NASA Kennedy Top 20 Stories of 2025 Article 7 days ago Keep Exploring Discover More Topics From NASA

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Humans in Space

Climate Change

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Categories: NASA

I Am Artemis: Grace Lauderdale

NASA News - Tue, 12/23/2025 - 9:00am
3 Min Read I Am Artemis: Grace Lauderdale Grace Lauderdale, exploration project manager for the Training Systems Office at NASA's Johnson Space Center in Houston, sits inside the Orion Mission Simulator used for training the Artemis II crew and flight control team. Credits: NASA/Rad Sinyak

Listen to this audio excerpt from Grace Lauderdale, exploration project manager for the Training Systems Office at NASA Johnson:

0:00 / 0:00

Your browser does not support the audio element.

In preparation for their mission around the Moon inside NASA’s Orion spacecraft, the Artemis II crew will spend countless hours training inside the Orion Mission Simulator. The simulator replicates what the crew will experience inside the spacecraft and allows the astronauts and flight controllers to rehearse every phase of the mission.

As the exploration project manager for the Training Systems Office at Johnson, Grace Lauderdale leads the team that develops and operates the Orion Mission Simulator at NASA’s Johnson Space Center in Houston, playing a key role in making sure astronauts and flight control teams are ready for the first crewed mission of the Artemis campaign.

"This simulator trains the flight control team and the crew all the way from launch to splashdown. Every button, every display, every view out the window is as lifelike as possible.”

Grace Lauderdale

Exploration Project Manager for the Training Systems Office at NASA Johnson

The simulator is more than a mock-up. It connects directly to Johnson’s Mission Control Center, sending real-time data, audio, and video — just like the spacecraft will during flight. That means the flight control team trains in parallel, seeing and hearing exactly what they would throughout the mission.

“One of our major goals is to make the data they see on their displays look like the real vehicle,” Lauderdale said. “We also simulate the near space and deep space networks, including all the communication delays. It’s all about realism.”

That realism is powered by a complex software system developed in collaboration with partners like Lockheed Martin. Lauderdale’s team works behind the scenes to ensure the simulator runs smoothly — writing code, troubleshooting issues, and even creating custom malfunctions to challenge the crew during training.

Grace Lauderdale, exploration project manager for the Training Systems Office at NASA’s Johnson Space Center in Houston, sits inside the Orion Mission Simulator used for training the Artemis II crew and flight control team.Credits: NASA/Rad Sinyak

To prepare astronauts for the unexpected, instructors work with Lauderdale’s team to simulate problems that could occur during the mission, some of which require creative solutions.

“There are times when the instructors will ask for malfunctions or capabilities that the sim doesn’t automatically do,” she said. “Part of our role is to come up with ways to make that happen.”

Her team plans, develops, and executes training scenarios in the Orion Mission Simulator across multiple Artemis missions, often simultaneously. “Currently, we’re planning for future crewed missions, developing Artemis III, and executing Artemis II,” she said.

The work is demanding, but deeply personal, according to Lauderdale.

“I’ve known I wanted to work at NASA since the seventh grade. Every class I took, the degree I earned — it was all to get here.”

Grace Lauderdale

Exploration Project Manager for the Training Systems Office at NASA Johnson

That passion shows in her leadership. Her team often works nights, weekends, and holidays to ensure the simulator is ready. During a recent 30-hour simulation, they spent days preparing, fixing memory issues, and ensuring the system wouldn’t crash. It didn’t.

“I’m very proud of my team,” she said. “They’ve put in countless hours of work to make sure this simulator reacts exactly as it would in the real mission.”

For Lauderdale, helping send astronauts around the Moon isn’t just a job—it’s a dream realized.

“Being part of getting us back to the Moon is very personal to me,” she said. “And I’m proud to be part of the team that will help get our astronauts there.”

Reid Wiseman and Victor Glover train for the Artemis II mission inside the Orion Mission Simulator at NASA’s Johnson Space Center in Houston. NASA/Bill Stafford About the AuthorErika Peters

Share Details Last Updated Dec 22, 2025 Related Terms Explore More 3 min read Get In, We’re Going Moonbound: Meet NASA’s Artemis Closeout Crew Article 6 days ago 4 min read Artemis II Flight Crew, Teams Conduct Demonstration Ahead of Launch Article 6 days ago 6 min read NASA Kennedy Top 20 Stories of 2025 Article 7 days ago Keep Exploring Discover More Topics From NASA

Missions

Humans in Space

Climate Change

Solar System

Categories: NASA

Webb Spots the 'Smoke' from Crashing Exocomets Around a Nearby Star

Universe Today - Tue, 12/23/2025 - 7:23am

The James Webb Space Telescope (JWST) was involved in yet another first discovery recently available in pre-print form on arXiv from Cicero Lu at the Gemini Observatory and his co-authors. This time, humanity’s most advanced space telescope found UV-fluorescent carbon monoxide in a protoplanetary debris disc for the first time ever. It also discovered some features of that disc that have considerable implications for planetary formation theory.

Categories: Astronomy

How lab-grown lichen could help us to build habitations on Mars

New Scientist Space - Cosmology - Tue, 12/23/2025 - 7:00am
Scientists cultivating partnerships of fungi and algae believe their invention has far-out implications for how we create the buildings of the future
Categories: Astronomy

How lab-grown lichen could help us to build habitations on Mars

New Scientist Space - Space Headlines - Tue, 12/23/2025 - 7:00am
Scientists cultivating partnerships of fungi and algae believe their invention has far-out implications for how we create the buildings of the future
Categories: Astronomy

Spectacular Cosmic Collision Captured in New Hubble Image

Scientific American.com - Tue, 12/23/2025 - 7:00am

NASA’s Hubble Space Telescope captured asteroids crashing into one another in a nearby planetary system around a star some 25 light-years away

Categories: Astronomy

10 Transformational Health Discoveries of 2025

Scientific American.com - Tue, 12/23/2025 - 6:30am

From advancements in male birth control to the science of supplements, Scientific American highlights some of the most fascinating health and medicine stories of 2025

Categories: Astronomy

Gene therapy for Huntington’s disease showed great promise in 2025

New Scientist Space - Cosmology - Tue, 12/23/2025 - 6:00am
An experimental gene therapy seems to slow the progression of Huntington’s disease by about 75 per cent, and researchers are working to make its complicated delivery much more practical
Categories: Astronomy

Gene therapy for Huntington’s disease showed great promise in 2025

New Scientist Space - Space Headlines - Tue, 12/23/2025 - 6:00am
An experimental gene therapy seems to slow the progression of Huntington’s disease by about 75 per cent, and researchers are working to make its complicated delivery much more practical
Categories: Astronomy

<p><a href="https://apod.nasa.gov/apod

APOD - Tue, 12/23/2025 - 4:00am

Stars are forming in the Soul of the Queen of


Categories: Astronomy, NASA

Europa's thick ice may hinder the search for life in its oceans

New Scientist Space - Cosmology - Tue, 12/23/2025 - 3:00am
The liquid ocean on Jupiter’s moon Europa appears to be completely sealed off from the planet’s surface, which may reduce the chances of finding life there
Categories: Astronomy

Europa's thick ice may hinder the search for life in its oceans

New Scientist Space - Space Headlines - Tue, 12/23/2025 - 3:00am
The liquid ocean on Jupiter’s moon Europa appears to be completely sealed off from the planet’s surface, which may reduce the chances of finding life there
Categories: Astronomy

IVF success may depend on how long men abstain from ejaculation

New Scientist Space - Space Headlines - Tue, 12/23/2025 - 2:00am
Ejaculating within 48 hours of providing a sperm sample for IVF seems to lead to greater success rates than abstaining from ejaculation for longer
Categories: Astronomy

IVF success may depend on how long men abstain from ejaculation

New Scientist Space - Cosmology - Tue, 12/23/2025 - 2:00am
Ejaculating within 48 hours of providing a sperm sample for IVF seems to lead to greater success rates than abstaining from ejaculation for longer
Categories: Astronomy

Curiosity Blog, Sols 4750-4762: See You on the Other Side of the Sun

NASA News - Mon, 12/22/2025 - 8:37pm
Curiosity Navigation

3 min read

Curiosity Blog, Sols 4750-4762: See You on the Other Side of the Sun NASA’s Mars rover Curiosity acquired this image, with the boxwork terrain in the foreground and Gale crater rim in the far background, using its Right Navigation Camera. Curiosity captured the image on Dec. 21, 2025 — Sol 4755, or Martian day 4,755 of the Mars Science Laboratory mission — at 15:57:21 UTC. NASA/JPL-Caltech

Written by Lucy Thompson, Planetary Scientist and APXS team member, University of New Brunswick, Canada

Earth planning date: Monday, Dec. 22, 2025

As we all prepare for the holiday season here on Earth, we have been planning a few last activities before Curiosity and the team of scientists and engineers take a well-deserved, extended break. This holiday season coincides with conjunction — every two years, because of their different orbits, Earth and Mars are obstructed from one another by the Sun; this one will last from Dec. 27 to Jan. 20. We do not like to send commands through the Sun in case they get scrambled, so we have been finishing up a few last scientific observations before preparing Curiosity for its quiet conjunction break.

As part of a pre-planned transect between our two recent drill holes, “Valle de la Luna” (hollow) and “Nevado Sajama” (ridge), we successfully completed chemical analyses and imaging of a ridge wall. These observations were acquired to document changes in texture, structure, and composition between the two drill holes and to elucidate why we see such contrasting physical features of resistant ridges and eroded hollows in this region. Mastcam and ChemCam also imaged a little further afield. ChemCam continued observations of the “Mishe Mokwa” butte and captured textures in the north facing wall of the next, adjacent hollow. Mastcam imaged the central fracture along the “Altiplano” ridge above the wall we were parked at, as well as polygonal features in our previous workspace.

The rover engineers then successfully orchestrated Curiosity’s drive back up onto the nearby ridge to ensure a safe parking spot over conjunction. We documented the drive with a MARDI sidewalk video, tracking how the terrain beneath the rover changes as we drive. Although we could not use APXS and MAHLI on the robotic arm from Friday on, owing to constraints that need to be in place prior to conjunction, we were able to use the rover’s Mastcam to image areas of interest in the near field, which will help us with our planned activities when we return from conjunction. These will hopefully include getting chemistry (with APXS and ChemCam) and imaging (with MAHLI) of some freshly broken rock surfaces that we drove over.

The environmental scientists were also very busy. Navcam observations included: Navcam suprahorizon and zenith movies to monitor clouds; Navcam line-of-sight observations; and Navcam dust-devil movies and surveys as we enter the dust storm season on Mars. Mastcam tau observations were acquired to monitor the optical depth of the atmosphere, and APXS analyses of the atmosphere were also planned to monitor seasonal variations in argon.

Today we are uplinking the last plan before Mars disappears behind the Sun and we all take a break (the actual conjunction plan to take us through sols 4763-4787 was uplinked a couple of weeks ago). Because of constraints put in place to make sure Curiosity stays safe and healthy, we were limited to very few activities in today’s plan. These include more APXS atmospheric argon measurements and Hazcam and Navcam imaging including monitoring for dust-devil activity.

As usual, our plans also included background DAN, RAD, and REMS observations, which continue through conjunction.

It has been a pleasure to be a part of this amazing team for another year. We are all looking forward to coming back in January, when Mars reappears from behind the Sun, to another exciting year of roving in Gale crater.

NASA’s Mars rover Curiosity at the base of Mount Sharp NASA/JPL-Caltech/MSSS

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Last Updated

Dec 22, 2025

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Categories: NASA

Curiosity Blog, Sols 4750-4762: See You on the Other Side of the Sun

NASA - Breaking News - Mon, 12/22/2025 - 8:37pm
Curiosity Navigation

3 min read

Curiosity Blog, Sols 4750-4762: See You on the Other Side of the Sun NASA’s Mars rover Curiosity acquired this image, with the boxwork terrain in the foreground and Gale crater rim in the far background, using its Right Navigation Camera. Curiosity captured the image on Dec. 21, 2025 — Sol 4755, or Martian day 4,755 of the Mars Science Laboratory mission — at 15:57:21 UTC. NASA/JPL-Caltech

Written by Lucy Thompson, Planetary Scientist and APXS team member, University of New Brunswick, Canada

Earth planning date: Monday, Dec. 22, 2025

As we all prepare for the holiday season here on Earth, we have been planning a few last activities before Curiosity and the team of scientists and engineers take a well-deserved, extended break. This holiday season coincides with conjunction — every two years, because of their different orbits, Earth and Mars are obstructed from one another by the Sun; this one will last from Dec. 27 to Jan. 20. We do not like to send commands through the Sun in case they get scrambled, so we have been finishing up a few last scientific observations before preparing Curiosity for its quiet conjunction break.

As part of a pre-planned transect between our two recent drill holes, “Valle de la Luna” (hollow) and “Nevado Sajama” (ridge), we successfully completed chemical analyses and imaging of a ridge wall. These observations were acquired to document changes in texture, structure, and composition between the two drill holes and to elucidate why we see such contrasting physical features of resistant ridges and eroded hollows in this region. Mastcam and ChemCam also imaged a little further afield. ChemCam continued observations of the “Mishe Mokwa” butte and captured textures in the north facing wall of the next, adjacent hollow. Mastcam imaged the central fracture along the “Altiplano” ridge above the wall we were parked at, as well as polygonal features in our previous workspace.

The rover engineers then successfully orchestrated Curiosity’s drive back up onto the nearby ridge to ensure a safe parking spot over conjunction. We documented the drive with a MARDI sidewalk video, tracking how the terrain beneath the rover changes as we drive. Although we could not use APXS and MAHLI on the robotic arm from Friday on, owing to constraints that need to be in place prior to conjunction, we were able to use the rover’s Mastcam to image areas of interest in the near field, which will help us with our planned activities when we return from conjunction. These will hopefully include getting chemistry (with APXS and ChemCam) and imaging (with MAHLI) of some freshly broken rock surfaces that we drove over.

The environmental scientists were also very busy. Navcam observations included: Navcam suprahorizon and zenith movies to monitor clouds; Navcam line-of-sight observations; and Navcam dust-devil movies and surveys as we enter the dust storm season on Mars. Mastcam tau observations were acquired to monitor the optical depth of the atmosphere, and APXS analyses of the atmosphere were also planned to monitor seasonal variations in argon.

Today we are uplinking the last plan before Mars disappears behind the Sun and we all take a break (the actual conjunction plan to take us through sols 4763-4787 was uplinked a couple of weeks ago). Because of constraints put in place to make sure Curiosity stays safe and healthy, we were limited to very few activities in today’s plan. These include more APXS atmospheric argon measurements and Hazcam and Navcam imaging including monitoring for dust-devil activity.

As usual, our plans also included background DAN, RAD, and REMS observations, which continue through conjunction.

It has been a pleasure to be a part of this amazing team for another year. We are all looking forward to coming back in January, when Mars reappears from behind the Sun, to another exciting year of roving in Gale crater.

NASA’s Mars rover Curiosity at the base of Mount Sharp NASA/JPL-Caltech/MSSS

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Dec 22, 2025

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