Feed aggregator
Europa Clipper Captures Uranus With Star Tracker Camera
NASA/JPL-Caltech Photojournal Navigation Downloads Europa Clipper Captures Uranus With Star Tracker Camera
PNG (128.99 KB)
Description
NASA’s Europa Clipper captured this image of a starfield — and the planet Uranus — on Nov. 5, 2025, while experimenting with one of its two stellar reference units. These star-tracking cameras are used for maintaining spacecraft orientation. Within the camera’s field of view — representing 0.1% of the full sky around the spacecraft — Uranus is visible as a larger dot near the left side of the image.
Figure A is an annotated version of the image with Uranus and several background stars labeled. NASA/JPL-Caltech Figure B is an animated GIF made of a pair of images taken 10 hours apart. In this version, Uranus can be seen moving very slightly, relative to the background stars. NASA/JPL-Caltech
At the time the images were taken, Europa Clipper was about 2 billion miles (3.2 billion kilometers) from Uranus. The spacecraft is currently en route to the Jupiter system to study the icy moon Europa.
Europa Clipper launched in October 2024 and will arrive at the Jupiter system in 2030 to conduct about 50 flybys of Europa. The mission’s main science goal is to determine whether there are places below Europa’s surface that could support life. The mission’s three main science objectives are to determine the thickness of the moon’s icy shell and its surface interactions with the ocean below, to investigate its composition, and to characterize its geology. The mission’s detailed exploration of Europa will help scientists better understand the astrobiological potential for habitable worlds beyond our planet.
For more information about Europa and Europa Clipper, go to: https://science.nasa.gov/mission/europa-clipper/
Keep Exploring Discover More Topics From Photojournal
Photojournal
Search Photojournal
Photojournal’s Latest Content
Feedback
NASA’s Quesst Mission Marks X-59’s Historic First Flight
NASA’s X-59 quiet supersonic research aircraft took off for its historic first flight on Oct. 28, 2025, at 11:14 a.m. EDT from Lockheed Martin Skunk Works in Palmdale, California. The one-of-a-kind aircraft flew for 67 minutes before landing and taxiing to NASA’s Armstrong Flight Research Center in Edwards, California.
NASA test pilot Nils Larson flew the X-59 up to an altitude of about 12,000 feet and an approximate top speed of 230 mph, precisely as planned. The plane’s landing gear remained down during the entire flight, a common practice for experimental aircraft flying for the first time.
Now that the X-59’s first flight is in the books, the team is focused on preparing for a series of test flights where the aircraft will operate at higher altitudes and supersonic speeds. This test flight phase of NASA’s Quesst mission will ensure the X-59 meets performance and safety expectations.
Through the Quesst mission, NASA aims to usher in a new age of quiet supersonic flight, achieved through the unique design and technology of the X-59 in future supersonic transport aircraft.
Image Credit: NASA/Lori Losey
NASA’s Scott Tingle to Serve as Agency’s Chief Astronaut
NASA named astronaut Scott Tingle as chief of the Astronaut Office at the agency’s Johnson Space Center in Houston, effective Nov. 10. A decorated spaceflight veteran and former captain in the United States Navy, Tingle has logged more than 4,500 flight hours in 51 different aircraft and served as a flight engineer aboard the International Space Station.
As chief astronaut, Tingle is responsible for managing astronaut resources and operations. He also will help develop astronaut flight crew operations and make crew assignments for future human spaceflight missions, including Artemis missions to the Moon.
“Our Johnson Space Center team congratulates Scott on his selection as chief of the Astronaut Office. We wish him well as he takes on this new and exciting leadership role,” said Johnson Space Center Director Vanessa Wyche. “I extend my sincerest thanks to Joe Acaba, for his dedicated service to the Astronaut Office, as he completed the tremendous task of preparing our astronaut corps for daring missions to and from the International Space Station and integrated their expertise and space knowledge to develop and test future technologies, software, and procedures making space travel safer and more attainable for our nation’s explorers.”
A native of Randolph, Massachusetts, Tingle was selected as a NASA astronaut in 2009. He holds a bachelor’s degree in mechanical engineering from Southeastern Massachusetts University and a master’s degree in mechanical engineering from Purdue University in West Lafayette, Indiana.
Tingle most recently served as a flight engineer aboard the space station, spending more than six months in orbit during Expedition 54/55. He was the flight engineer and United States Operational Segment lead for the mission, which launched from the Baikonur Cosmodrome aboard a Soyuz spacecraft on Dec. 17, 2017, and concluded with landing on June 3, 2018. Since returning to Earth, he has supported the Astronaut Office in various roles, including mission support, technical leadership, and crew readiness activities.
Before coming to NASA, Tingle worked for The Aerospace Corporation in El Segundo, California, where he served as a technical staff member supporting the company’s propulsion department. He was commissioned as a naval officer in 1991 and went on to complete a distinguished career, earning the rank of captain before retiring. Follow Tingle on X.
Tingle succeeds NASA astronaut Joe Acaba, who had served as chief of the Astronaut Office since February 2023. Acaba has transitioned to the center director’s staff, where he provides technical advice on mission planning and strategy at NASA Johnson. In this new role, he leads the center’s alignment with NASA’s strategic plan and human spaceflight priorities, supports the agency’s STEM workforce goals, and advances collaboration with commercial space, academia, and other government partners as NASA continues its exploration beyond low Earth orbit.
Learn more about the International Space Station:
https://www.nasa.gov/international-space-station
-end-
Shaneequa Vereen
Johnson Space Center, Houston
281-483-5111
shaneequa.y.vereen@nasa.gov
NASA Celebrates Five Years of Artemis Accords, Welcomes 3 New Nations
October marked the fifth anniversary of NASA and the original founders signing the Artemis Accords, as well as the recognition of Hungary, Malaysia and the Philippines joining the expanding coalition dedicated to the peaceful exploration of space. The number of countries involved now totals 59.
“NASA welcomes the newest signatories, whose participation strengthens the global commitment to responsible exploration,” said acting NASA Administrator Sean Duffy. “Their decision to sign the Artemis Accords affirms a shared commitment to safe, transparent, and peaceful exploration — at a time when others seek to weaponize the final frontier. Together we are building the foundation for the Golden Age of space exploration.”
Both Malaysia and the Philippines signed the Artemis Accords as part of President Trump’s visit to Kuala Lumpur for the annual Association of Southeast Asian Nations Summit. The separate signings were announced by the White House on Oct. 26.
Foreign Minister Péter Szijjártó of Hungary signed the Artemis Accords on Oct. 22 while in Washington during an official visit, in the lead up to President Trump’s meeting with Prime Minister Viktor Orbán.
Hungary’s signing came three months after Hungarian to Orbit (HUNOR) astronaut Tibor Kapu launched to space in a mission aboard a SpaceX Dragon spacecraft to the International Space Station. The private astronauts, part of the NASA-supported Axiom Mission 4 crew, spent about two weeks conducting science, outreach, and commercial activities, alongside NASA astronauts.
Five years of progress
On Oct. 13, 2020, during the first Trump Administration, the United States, led by NASA and the U.S. Department of State, joined with seven other founding nations to establish the Artemis Accords, responding to the growing interest in lunar activities by both governments and private companies.
Since then, the Artemis Accords have grown into an international coalition. What began with a handful of founding nations has multiplied with seven countries signing in 2025 alone. The surge in participation highlights an increased global commitment to shaping a safe, peaceful, and prosperous future in space.
In September, NASA co-chaired the Artemis Accords Principals’ Meeting in Sydney alongside the space agencies of Australia and the United Arab Emirates. The gathering brought together dozens of signatory nations to deepen dialogue and strengthen shared commitments to the sustainable and responsible use of space. Global space leaders discussed the following topics:
- Non-interference in each other’s space activities, including transparency on expected launch dates, general nature of activities, and landing location
- Orbital debris mitigation
- Interoperability of systems for safer and more efficient operations
- Release of scientific data
At the meeting, NASA committed to hosting an Artemis Accords workshop in 2026 for signatories focused on transparency and the sharing of data. The agency has taken additional steps since the accords were established to release more information about lunar missions, promoting openness and preventing harmful interference.
The progress made by signatories, and their continued commitment to implementing the accords’ principles, is essential to advancing sustainable exploration of the Moon under the Artemis campaign, Mars, and beyond. Following a call to Artemis Accords signatories, four CubeSats from South Korea, Saudi Arabia, Argentina, and Germany, will fly on Artemis II.
More nations are expected to sign the accords in the months and years ahead, as NASA and its partners continue to advance the principles of the accords.
Learn more about the Artemis Accords at:
https://www.nasa.gov/artemis-accords
Share Details Last Updated Nov 20, 2025 LocationNASA Headquarters Related TermsNASA Sets Coverage for Crew Launch to Join Station Expedition
NASA astronaut Chris Williams will launch aboard the Roscosmos Soyuz MS-28 spacecraft to the International Space Station on Thursday, Nov. 27, accompanied by cosmonauts Sergey Kud-Sverchkov and Sergei Mikaev, where they will join the Expedition 73 crew advancing scientific research.
Williams, Kud-Sverchkov, and Mikaev will lift off at 4:27 a.m. EST (2:27 p.m. Baikonur time) from the Baikonur Cosmodrome in Kazakhstan. Live launch and docking coverage will be available on NASA+, Amazon Prime, and the agency’s YouTube channel. Learn how to watch NASA content through a variety of platforms, including social media.
After a two-orbit, three-hour trip to the orbital complex, the spacecraft will automatically dock to the station’s Rassvet module at approximately 7:38 a.m. Shortly after, hatches will open between Soyuz and the space station.
Once aboard, the trio will join NASA astronauts Mike Fincke, Zena Cardman, and Jonny Kim, JAXA (Japan Aerospace Exploration Agency) astronaut Kimiya Yui, and Roscosmos cosmonauts Sergei Ryzhikov, Alexey Zubritsky, and Oleg Platonov.
NASA’s coverage is as follows (all times Eastern and subject to change based on real-time operations):
Thursday, Nov. 27
3:30 a.m. – Launch coverage begins on NASA+, Amazon Prime, and YouTube.
4:27 a.m. – Launch
6:45 a.m. – Rendezvous and docking coverage begins on NASA+, Amazon Prime, and YouTube.
7:38 a.m. – Docking to the space station
9:50 a.m. – Hatch opening and welcome remarks coverage begins on NASA+, Amazon Prime, and YouTube.
10:10 a.m. – Hatch opening
Williams, Kud-Sverchkov, and Mikaev will spend approximately eight months aboard the space station as Expedition 73/74 crew members, before returning to Earth in summer 2026. This will be the first spaceflight for Williams and Mikaev, and the second for Kud-Sverchkov.
During his stay aboard station, Williams will conduct scientific research and technology demonstrations aimed at advancing human space exploration and benefiting life on Earth. He will help install and test a new modular workout system for long-duration missions, support experiments to improve cryogenic fuel efficiency and grow semiconductor crystals in space, and assist NASA in designing new re-entry safety protocols to protect crews during future missions.
For more than 25 years, people have lived and worked continuously aboard the International Space Station, advancing scientific knowledge and making research breakthroughs that are not possible on Earth. The station is a critical testbed for NASA to understand and overcome the challenges of long-duration spaceflight and to expand commercial opportunities in low Earth orbit. As commercial companies concentrate on providing human space transportation services and destinations as part of a robust low Earth orbit economy, NASA is focusing its resources on deep space missions to the Moon as part of the Artemis campaign in preparation for future human missions to Mars.
Learn more about International Space Station research and operations at:
-end-
Joshua Finch / Jimi Russell
Headquarters, Washington
202-358-1100
joshua.a.finch@nasa.gov / james.j.russell@nasa.gov
Sandra Jones / Joseph Zakrzewski
Johnson Space Center, Houston
281-483-5111
sandra.p.jones@nasa.gov / joseph.a.zakrzewski@nasa.gov
What’s Up: November 2025 Skywatching Tips from NASA
Mars and Mercury get close for a conjunction, the Leonid meteor shower delights, and Saturn’s rings are…disappearing?
Skywatching Highlights- Nov. 12: A conjunction between Mars and Mercury
- Nov. 16-18: Leonid meteor shower peak viewing
- Nov. 23: Saturn’s rings disappear
Mars and Mercury have a cozy conjunction, the Leonid meteor shower delights, and Saturn’s rings are…disappearing?
That’s What’s Up for November.
Conjunction:Mars and Mercury will cozy up together in the night sky just after sunset on November 12th.
The planets will experience what is known as a conjunction, meaning they appear close together in the sky from our view (even though in real life, Mars and Mercury are well over 100 million miles apart).
But you can see these two long distance pals close together if you look slightly southwest just after sunset in the early evening sky on November 12th.
NASA/JPL-Caltech
Mars will be just to the right above Mercury, and you’ll know it’s Mars by its distinctive reddish-orange color.
Leonid Meteor Shower:The Leonid meteor shower will sparkle across the skies this month, peaking on November 17th.
NASA/JPL-Caltech
While the meteor shower stretches from November 3rd through December 2nd, it will be at its most visible late on the night of November 16th into the dawn of November 17th, even into the early morning of November 18th.
Look for meteors coming from the shower’s radiant point within the constellation Leo in the eastern sky.
With dark skies, you might see 10-15 meteors per hour with this shower which happens when we travel through the debris trailing the comet 55P/Tempel-Tuttle.
Saturn’s rings disappearSaturn’s rings will disappear from view this November!
Saturn orbits the sun leaning at an angle of 26.7 degrees. This means that from our view, its rings shift up and down over time.
On November 23, Saturn will be angled in such a way that its rings face us, and since they are so thin they’ll just disappear from view.
Alan Friedman/avertedimagination.com
But don’t worry, the rings aren’t gone from view forever. As the planet continues to orbit, its rings will gradually become more visible again.
Conclusion + Moon PhasesHere are the phases of the Moon for November.
NASA/JPL-Caltech
You can stay up to date on all of NASA’s missions exploring the solar system and beyond at science.nasa.gov.
I’m Chelsea Gohd from NASA’s Jet Propulsion Laboratory, and that’s What’s Up for this month.
Keep Exploring Discover More Topics From NASA
What’s Up
Skywatching
Galaxies
Stars
Common type of inflammatory bowel disease linked to toxic bacteria
NASA Fuels Discovery from Earth to Sky: One Crayon at a Time
6 min read
NASA Fuels Discovery from Earth to Sky: One Crayon at a Time Student interns help kids color in data to learn more about the far side of the Moon while visiting the Goddard Space Flight Center Visitor Center. Photo Credit: NASA Earth to Sky
A collaboration between the NASA Earth Science Education Collaborative (NESEC) and Earth to Sky (ETS) – an exciting, growing partnership between NASA, the National Park Service, and other federal, state, and local organizations – is facilitating the implementation of a simple, yet incredibly effective activity that will help millions of national park visitors connect with NASA Earth and space science.
The Color-a-Pixel activity, developed by NESEC, transforms complex satellite imagery into accessible, collaborative art projects. Incorporating this simple technique into ETS science communication training programs demonstrates to park interpreters and outdoor educators how NASA’s view from space can enhance millions of visitor experiences at parks, refuges, and nature centers.
“This low-tech activity is powerful because of its simplicity,” explains ETS Space Science Coordinator Brandi Stewart, “All you have to do is pick up a crayon, follow the easy number guides, and discover the stories that NASA satellites are telling us about our world and beyond.”
The Color-a-Pixel activity begins with selecting satellite imagery from NASA missions like Landsat, the Mars Reconnaissance Orbiter (MRO), or the Lunar Reconnaissance Orbiter (LRO). Using technology developed by NESEC’s lead organization, the Institute for Global Environmental Strategies, these images are converted into a 3’ by 2’ poster of numbered squares, each corresponding to one of 120 standard Crayola crayon colors.
Earth to Sky demonstrates the magnetic appeal of this activity by setting it up for the rangers and educators during workshops. With a bit of explanation, participants immediately jump in, eager to reveal the imagery and data shown through the pixels.
“It becomes a group mission that, by the end of the training, the image will be fully colored in and complete. It’s been a great teambuilding and stress-relieving activity for our participants,” states Geneviève de Messières, Earth to Sky Program Lead.
When applied to public lands communication efforts, this activity becomes a tool for interpretive messaging. While visitors work on completing the image, park rangers can weave in scientific concepts, environmental change stories, and space exploration connections. This activity also drives home that satellite imagery is more than just a pretty picture – each pixel is also data that scientists use to better understand Earth and other worlds throughout our solar system.
Bringing Space Down to EarthSome ways that Earth to Sky has implemented the activity at special events on public lands include:
- Death Valley Dark Sky Festival, California: Visitors were invited to color Landsat imagery of Earth’s Badwater Basin and MRO imagery of Mars’ Belva Crater. As they colored, Earth to Sky outreach specialists made connections between finding signs of water on the dry landscapes in both locations.
- Park After Dark, Minnesota: During this urban event hosted by Mississippi River & National Recreation Area in Minneapolis St. Paul, attendees worked together to color topographical maps of both the Moon’s familiar near side and its mysterious far side, using data from NASA’s Lunar Reconnaissance Orbiter. The striking differences that emerged through their coloring sparked questions about why the Moon’s two hemispheres appear so dramatically different, leading to rich discussions about lunar formation and geological change.
- Patuxent Wildlife Refuge Open House, Maryland: Just miles from the urban centers of Baltimore and Washington DC, the Color-a-Pixel activity helped local community members visualize something they could feel but not easily see: the refuge’s role as a “cool island” in an urban heat landscape. Visitors colored Landsat imagery of the refuge and surrounding neighborhoods while examining heat maps showing temperature differences between developed areas and the protected green space. The activity helped residents understand the refuge’s importance beyond wildlife habitat.
All of these activities are available on the Institute for Global Environmental Strategies (IGES) website in a pre-generated format ready for printing.
A Colorful CollaborationThe collaboration between NESEC and Earth to Sky brings complex scientific concepts to diverse audiences in engaging and relevant ways. Earth to Sky’s community of practice –now including more than 2,000 interpreters and environmental educators – reaches millions of visitors annually across the country’s parks, refuges, and nature centers.
Theresa Schwerin, who leads NESEC, noted that Color-a-Pixel originally started as a simple idea for a tabletop activity to use at conferences and public events. “I wanted something hands-on that could draw people in and start conversations as simple as ‘these beautiful NASA images from space are data’ and talk about different NASA missions and how they are relevant to people’s lives. There’s also an opportunity to invite the public to contribute to NASA science by participating in citizen science projects … [some of which] can fill in the details of the pixels with information that complements NASA’s view from space.”
Andrew Clark, a data scientist and engineer at IGES, created the Color-a-Pixel poster generator, which has gone through several iterations to make it more effective. Schwerin noted, “I’ve used this at several public events. Kids will jump right in, with parents watching over their shoulders. Soon enough, the entire family is coloring together and asking questions about the image and NASA. I am thrilled about our collaboration with Earth to Sky that is taking this even further.”
As environmental challenges increasingly affect public lands, this collaboration helps visitors understand these issues through NASA’s unique perspective from above. The activity also introduces learners of all ages to the broader value of NASA’s Earth science missions alongside its more well-known space exploration endeavors.
Continuing to Color Outside the LinesLooking ahead, the Earth to Sky partnership plans to continue using this activity in each new place they host a training. Most recently, Earth to Sky shared the activity with 417 visitors to the Goddard Space Flight Center Visitor Center, where local families colored in topographical Moon maps to prepare for International Observe the Moon Night. Additionally, a recording of a recent Color-a-Pixel webinar with NESEC’s Theresa Schwerin is available on the Earth to Sky website for interpreters and informal educators interested in implementing this place-based activity. Free registration is required to access this (and dozens of other) webinar recordings.
The success of this collaboration demonstrates how seemingly simple activities – enhanced with NASA science – can create meaningful learning experiences that resonate with visitors long after they leave a park or refuge.
For interpreters, educators, or NASA enthusiasts interested in bringing the Color-a-Pixel activity to their own sites or events, pre-generated activities are available in the gallery at: https://strategies.org/color-a-pixel-pregenerated.
NASA science is helping humanity discover new perspectives on both our home planet and the universe beyond, one crayon at a time. Learn more about how Science Activation connects NASA science experts, real content, and experiences with community leaders to do science in ways that activate minds and promote deeper understanding of our world and beyond: https://science.nasa.gov/learn/about-science-activation/.
Share Details Last Updated Nov 20, 2025 Editor NASA Science Editorial Team Related Terms Explore More 5 min read Helio Highlights: October 2025Since we all have a relationship with the Sun, it is important to learn about…
Article
2 months ago
4 min read From City Lights to Moonlight: NASA Training Shows How Urban Parks Can Connect Communities with Space Science
Article
2 months ago
3 min read NASA Helps Connect Astronomers and Community Colleges Across the Nation
Article
2 months 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…
NASA Progresses Toward Artemis II Moon Mission
As 2026 nears, NASA continues moving forward to launching and flying Artemis II, the first crewed mission under the Artemis campaign, no later than April next year.
NASA’s Orion spacecraft, complete with its launch abort system escape tower, is now integrated with the SLS (Space Launch System) rocket in the Vehicle Assembly Building (VAB) at the agency’s Kennedy Space Center in Florida. Following Orion stacking, teams completed testing critical communications systems between SLS and Orion, and confirmed the interfaces function properly between the rocket, Orion, and the ground systems, including end-to-end testing with the Near Space Network and Deep Space Network, which aid in communications and navigation.
“NASA remains focused on getting ready to safely fly four astronauts around the Moon and back,” said acting NASA Administrator Sean Duffy. “Our mission will lay the groundwork for future missions to the lunar surface and to Mars.”
In the coming weeks, engineers and the Artemis II crew will conduct the first part of a Countdown Demonstration Test at Kennedy, a dress rehearsal for launch day. The crew will don their Orion crew survival system spacesuits and venture to their rocket before being secured inside Orion, which the crew recently named Integrity, simulating the final moments of the countdown. Because the rocket and spacecraft are not yet at the launch pad, the crew will board Orion inside the VAB. The test will serve as a final verification of the timeline for the crew and supporting teams on the ground. A second part of the test, preparing for an emergency at the launch pad, will occur after the rocket and spacecraft roll out to Launch Pad 39B.
NASA astronaut Christina Koch, Artemis II mission specialist, and the remaining Artemis II crew members walk on the crew access arm of the mobile launcher in the Vehicle Assembly Building at NASA’s Kennedy Space Center in Florida on Tuesday, Aug. 12, 2025. NASA/Kim Shiflett
The Artemis II crew and ground personnel responsible for launching and flying the mission are preparing to conduct additional integrated simulations across teams and facilities to prepare for any scenario that could arise as the crew of four launches from Florida and flies their approximately 10-day mission.
NASA astronauts Reid Wiseman, Victor Glover, and Christina Koch, and CSA (Canadian Space Agency) astronaut Jeremy Hansen, have a busy schedule over the next several months reviewing procedures for all phases of flight until their preparations are second nature, practicing for different mission scenarios, and maintaining their familiarity with every element of their spacecraft.
Through Artemis, NASA will send astronauts to explore the Moon for scientific discovery, economic benefits, and build the foundation for the first crewed missions to Mars.
NASA
NASA’s Quesst Mission Marks X-59’s Historic First Flight
NASA’s X-59 quiet supersonic research aircraft took off for its historic first flight on Oct. 28 at 11:14 a.m. EDT from Lockheed Martin Skunk Works in Palmdale, California. The one-of-a-kind aircraft flew for 67 minutes before landing and taxiing to NASA’s Armstrong Flight Research Center in Edwards, California.
NASA test pilot Nils Larson flew the X-59 up to an altitude of about 12,000 feet and an approximate top speed of 230 mph, precisely as planned. The plane’s landing gear remained down during the entire flight, a common practice for experimental aircraft flying for the first time.
Now that the X-59’s first flight is in the books, the team is focused on preparing for a series of test flights where the aircraft will operate at higher altitudes and supersonic speeds. This test flight phase of NASA’s Quesst mission will ensure the X-59 meets performance and safety expectations.
Through the Quesst mission, NASA aims to usher in a new age of quiet supersonic flight, achieved through the unique design and technology of the X-59 in future supersonic transport aircraft.
Share Details Last Updated Nov 20, 2025 EditorMaria WerriesContactKristen Hatfieldkristen.m.hatfield@nasa.gov Related Terms Explore More 1 min read X-59 First Flight Media Resources Article 7 hours ago 5 min read NASA’s X-59 Completes First Flight, Prepares for More Flight Testing Article 1 day ago 3 min read NASA, Industry Weave Data Fabric with Artificial IntelligenceAir taxis and drones navigate different flight zones with NASA-inspired system
Article 3 days ago Keep Exploring Discover More Topics From NASAArmstrong Flight Research Center
Aeronautics
QuesstQuesst is NASA's mission to demonstrate how the X-59 can fly supersonic without generating loud sonic booms and then survey…
Integrated Aviation Systems Program
NASA, Aerospace Corporation Study Sharpens Focus on Ammonia Emissions
6 min read
Preparations for Next Moonwalk Simulations Underway (and Underwater) Researchers used data taken in March 2023 by an airborne imaging spectrometer to map ammonia emissions in the Imperial Valley. Produced by agricultural activities as well as geothermal processes, ammonia is a precursor to particulate matter, which can cause adverse health outcomes when inhaled.NASA/JPL-Caltech
The pungent gas contributes to fine airborne particulate pollution, which endangers human health when inhaled and absorbed in the bloodstream.
A recent study led by scientists at NASA’s Jet Propulsion Laboratory in Southern California and the nonprofit Aerospace Corporation shows how high-resolution maps of ground-level ammonia plumes can be generated with airborne sensors, highlighting a way to better track the gas. A key chemical ingredient of fine particulate matter — tiny particles in the air known to be harmful when inhaled — ammonia can be released through agricultural activities such as livestock farming and geothermal power generation as well as natural geothermal processes. Because it’s not systematically monitored, many sources of the pungent gas go undetected.
Published in Atmospheric Chemistry and Physics in October, the study focuses on a series of 2023 research flights that covered the Imperial Valley to the southeast of the Salton Sea in inland Southern California, as well as the Eastern Coachella Valley to its northwest. Prior satellite-based research has identified the Imperial Valley as a prolific source of gaseous ammonia. In the study, scientists employed an airborne sensor capable of resolving ammonia plumes with enough detail to track their origins: Aerospace Corporation’s Mako instrument is an imaging spectrometer that observes long-wave infrared light emitted by areas of Earth’s surface and atmosphere 6 feet (2 meters) across.
Using the instrument, which can detect ammonia’s chemical signature by the infrared light it absorbs, the authors found elevated levels of the gas near several sources, including agricultural fields, livestock feedlots, geothermal plants, and geothermal vents. Measurements in parts of the Imperial Valley were 2½ to eight times higher than in Coachella Valley’s Mecca community, which had ammonia concentrations closer to background levels.
Though not toxic on its own in low concentrations, ammonia is a precursor to particulate matter, also known as aerosol or particle pollution. It reacts with other gases to form solid ammonium salt particles small enough to penetrate the bloodstream from the lungs. Particles under 2.5 micrometers in diameter — also known as PM2.5 — are associated with elevated rates of asthma, lung cancer, and cardiovascular disease, among other negative health outcomes.
“Historically, more attention has focused on primary sources of PM2.5, such as auto emissions. But with significant reductions in those emissions and increasingly stringent air quality standards, there is growing interest in understanding secondary sources that form particles in the air from precursor gases,” said Sina Hasheminassab, lead author of the paper and a research scientist at JPL. “As an important precursor to PM2.5, ammonia plays a key role, but its emissions are poorly characterized and undermonitored.”
Rising ammonia
Previous satellite-based studies have shown rising levels of atmospheric ammonia, both globally and in the continental United States. That research revealed broad trends, but with spatial resolution on the order of tens of miles, the measurements were only sufficient to identify variation over areas of hundreds of square miles or more.
The chemical behavior of ammonia also poses a particular monitoring challenge: Once emitted, it only stays in the atmosphere for hours before reacting with other compounds. In contrast, carbon dioxide can remain in the air for centuries.
Planes and satellites can provide an overview of sources and the geographic distribution of emissions at a given moment. Although satellites offer wider and more recurrent coverage, airborne instruments, being closer to the source, produce higher-resolution data and can focus on specific locations at designated times.
Those proved to be the right capabilities for the recent study. Researchers flew Mako over the Imperial and Eastern Coachella valleys on the mornings and afternoons of March 28 and Sept. 25, 2023, and took concurrent measurements on the ground with both a fixed monitoring station in Mecca operated by the South Coast Air Quality Management District (AQMD) and a mobile spectrometer developed at the University of California, Riverside.
“The goal was to show that this technique was capable of delivering data with the required accuracy that aerosol scientists and potentially even air quality regulatory bodies could use to improve the air quality in those regions,” said David Tratt, a senior scientist at Aerospace Corporation and coauthor of the paper. “We ended up with maps that identify multiple sources of ammonia, and we were able to track the plumes from their sources and observe them coalescing into larger clouds.”
Distinct plumes
During the flights, the team collected data over the southeastern coast of the Salton Sea, which straddles Riverside and Imperial counties. There, Mako revealed small plumes coming from geothermal fumaroles venting superheated water and steam that react with nitrogen-bearing compounds in the soil, releasing ammonia.
Farther to the southeast, the results showed several geothermal power plants emitting ammonia, primarily from their cooling towers, as part of their normal operations.
Farther southeast still, the researchers spotted ammonia emissions, a byproduct of animal waste, from cattle farms in the Imperial Valley. During the March 28 flight, a plume from the largest facility in the study area measured up to 1.7 miles (2.8 kilometers) wide and extended up to 4.8 miles (7.7 kilometers) downwind of the source.
‘Very large puzzle’
As part of the study, AQMD’s Mecca monitoring station recorded seasonal changes in ammonia concentrations. Given the few sources in the area, the researchers surmised that winds during certain months tend to blow the gas from Imperial Valley to the Coachella Valley.
The study underscores the benefits of detailed spatial information about ammonia emissions, and it partly informed the agency’s decision in July to expand its ammonia-monitoring network and extend the life of the Mecca station.
As a precursor to PM2.5, ammonia is “one piece of a very large puzzle” that, for Coachella Valley residents, includes vehicle emissions, desert dust, and agricultural activities, said Payam Pakbin, manager of the Advanced Monitoring Technologies Unit at AQMD and a paper coauthor.
“These communities want to know the contributions of these sources to the air quality they’re experiencing,” he added. “Findings like these help our agency better prioritize which sources require the most attention and ultimately guide our focus toward those that are the highest priority for achieving emission reductions in this community.”
NASA Studies Wildflowers From the Air NASA Maps Critical Minerals With High-Altitude Aircraft NASA Helps Spot Wine Grape Disease From the SkiesNews Media Contacts
Andrew Wang / Andrew Good
Jet Propulsion Laboratory, Pasadena, Calif.
626-379-6874 / 626-840-4291
andrew.wang@jpl.nasa.gov / andrew.c.good@jpl.nasa.gov
2025-129
Share Details Last Updated Nov 20, 2025 Related Terms Explore More 2 min read SARP 2025 Closeout Article 1 day ago 9 min read SARP East 2025 Atmospheric Chemistry Group Article 1 day ago 10 min read SARP East 2025 Terrestrial Fluxes Group Article 1 day ago Keep Exploring Discover Related Topics Explore Earth ScienceFrom its origins, NASA has studied our planet in novel ways, using a fleet of satellites and ambitious airborne and ground-based…
Earth Science at WorkNASA Earth Science helps Americans respond to challenges and societal needs — such as wildland fires, hurricanes, and water supplies…
Earth Science Data
Earth Science MissionsIn order to study the Earth as a whole system and understand how it is changing, NASA develops and supports…
Moss spores survive and germinate after 283-day 'space walk'
Mouse 'midwives' help their pregnant companions give birth
Astronomers Spot "First Stars" Billions of Years After They Were Supposed to Die
Over the course of billions of years, the universe has steadily been evolving. Thanks to the expansion of the universe, we are able to “see” back in time to watch that evolution, almost from the beginning. But every once in a while we see something that doesn’t fit into our current understanding of how the universe should operate. That’s the case for a galaxy described in a new paper by PhD student Sijia Cai of Tsinghua University’s Department of Astronomy and their colleagues. They found a galaxy formed around 11 billion years ago that appears to be “metal-free”, indicating that it might contain a set of elusive first generation (Pop III) stars.