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By NASA
6 min read
NASA Observes First Visible-light Auroras at Mars
On March 15, 2024, near the peak of the current solar cycle, the Sun produced a solar flare and an accompanying coronal mass ejection (CME), a massive explosion of gas and magnetic energy that carries with it large amounts of solar energetic particles. This solar activity led to stunning auroras across the solar system, including at Mars, where NASA’s Perseverance Mars rover made history by detecting them for the first time from the surface of another planet.
The first visible-light image of green aurora on Mars (left), taken by the Mastcam-Z instrument on NASA’s Perseverance Mars rover. On the right is a comparison image of the night sky of Mars without aurora but featuring the Martian moon Deimos. The moonlit Martian night sky, lit up mostly by Mars’ nearer and larger moon Phobos (outside the frame) has a reddish-brown hue due to the dust in the atmosphere, so when green auroral light is added, the sky takes on a green-yellow tone, as seen in the left image. NASA/JPL-Caltech/ASU/MSSS/SSI “This exciting discovery opens up new possibilities for auroral research and confirms that auroras could be visible to future astronauts on Mars’ surface.” said Elise Knutsen, a postdoctoral researcher at the University of Oslo in Norway and lead author of the Science Advances study, which reported the detection.
Picking the right aurora
On Earth, auroras form when solar particles interact with the global magnetic field, funneling them to the poles where they collide with atmospheric gases and emit light. The most common color, green, is caused by excited oxygen atoms emitting light at a wavelength of 557.7 nanometers. For years, scientists have theorized that green light auroras could also exist on Mars but suggested they would be much fainter and harder to capture than the green auroras we see on Earth.
Due to the Red Planet’s lack of a global magnetic field, Mars has different types of auroras than those we have on Earth. One of these is solar energetic particle (SEP) auroras, which NASA’s MAVEN (Mars Atmosphere and Volatile EvolutioN) mission discovered in 2014. These occur when super-energetic particles from the Sun hit the Martian atmosphere, causing a reaction that makes the atmosphere glow across the whole night sky.
While MAVEN had observed SEP auroras in ultraviolet light from orbit, this phenomenon had never been observed in visible light from the ground. Since SEPs typically occur during solar storms, which increase during solar maximum, Knutsen and her team set their sights on capturing visible images and spectra of SEP aurora from Mars’ surface at the peak of the Sun’s current solar cycle.
Coordinating the picture-perfect moment
Through modeling, Knutsen and her team determined the optimal angle for the Perseverance rover’s SuperCam spectrometer and Mastcam-Z camera to successfully observe the SEP aurora in visible light. With this observation strategy in place, it all came down to the timing and understanding of CMEs.
“The trick was to pick a good CME, one that would accelerate and inject many charged particles into Mars’ atmosphere,” said Knutsen.
That is where the teams at NASA’s Moon to Mars (M2M) Space Weather Analysis Office and the Community Coordinated Modeling Center (CCMC), both located at NASA’s Goddard Space Flight Center in Greenbelt, Maryland, came in. The M2M team provides real-time analysis of solar eruptions to the CCMC for initiating simulations of CMEs to determine if they might impact current NASA missions. When the simulations suggest potential impacts, the team sends out an alert.
At the University of California, Berkeley, space physicist Christina Lee received an alert from the M2M office about the March 15, 2024, CME. Lee, a member of the MAVEN mission team who serves as the space weather lead, determined there was a notable solar storm heading toward the Red Planet,which could arrive in a few days. She immediately issued the Mars Space Weather Alert Notification to currently operating Mars missions.
“This allows the science teams of Perseverance and MAVEN to anticipate impacts of interplanetary CMEs and the associated SEPs,” said Lee.
“When we saw the strength of this one,” Knutsen said, “we estimated it could trigger aurora bright enough for our instruments to detect.”
A few days later, the CME impacted Mars, providing a lightshow for the rover to capture, showing the aurora to be nearly uniform across the sky at an emission wavelength of exactly 557.7 nm. To confirm the presence of SEPs during the aurora observation, the team looked to MAVEN’s SEP instrument, which was additionally corroborated by data from ESA’s (European Space Agency) Mars Express mission. Data from both missions confirmed that the rover team had managed to successfully catch a glimpse of the phenomenon in the very narrow time window available.
“This was a fantastic example of cross-mission coordination. We all worked together quickly to facilitate this observation and are thrilled to have finally gotten a sneak peek of what astronauts will be able to see there some day,” said Shannon Curry, MAVEN principal investigator and research scientist at the Laboratory for Atmospheric and Space Physics (LASP) at the University of Colorado Boulder (CU Boulder).
The future of aurora on Mars
By coordinating the Perseverance observations with measurements from MAVEN’s SEP instrument, the teams could help each other determine that the observed 557.7 nm emission came from solar energetic particles. Since this is the same emission line as the green aurora on Earth, it is likely that future Martian astronauts would be able to see this type of aurora.
“Perseverance’s observations of the visible-light aurora confirm a new way to study these phenomena that’s complementary to what we can observe with our Mars orbiters,” said Katie Stack Morgan, acting project scientist for Perseverance at NASA’s Jet Propulsion Laboratory in Southern California. “A better understanding of auroras and the conditions around Mars that lead to their formation are especially important as we prepare to send human explorers there safely.”
On September 21, 2014, NASA’s MAVEN (Mars Atmosphere and Volatile EvolutioN) spacecraft entered orbit around Mars. The mission has produced a wealth of data about how Mars’ atmosphere responds to the Sun and solar wind NASA/JPL-Caltech More About Perseverance and MAVEN
The Mars 2020 Perseverance mission is part of NASA’s Mars Exploration Program portfolio and NASA’s Moon to Mars exploration approach, which includes Artemis missions to the Moon that will help prepare for human exploration of the Red Planet. NASA’s Jet Propulsion Laboratory, which is managed for the agency by Caltech, built and manages operations of the Perseverance rover.
The MAVEN mission, also part of NASA’s Mars Exploration Program portfolio, is led by LASP at CU Boulder. It’s managed by NASA’s Goddard Space Flight Center and was built and operated by Lockheed Martin Space, with navigation and network support from NASA’s JPL.
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By Willow Reed
Laboratory for Atmospheric and Space Physics (LASP), University of Colorado Boulder
Media Contact:
Karen Fox / Molly Wasser
Headquarters, Washington
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Nancy N. Jones
NASA’s Goddard Space Flight Center, Greenbelt, Md.
DC Agle
Jet Propulsion Laboratory, Pasadena, Calif.
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agle@jpl.nasa.gov
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Last Updated May 14, 2025 Related Terms
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By NASA
6 min read
Preparations for Next Moonwalk Simulations Underway (and Underwater)
This artist’s concept shows the Moon’s hot interior and volcanism about 2 to 3 billion years ago. It is thought that volcanic activity on the lunar near side (the side facing Earth) helped create a landscape dominated by vast plains called mare, which are formed by molten rock that cooled and solidified. NASA/JPL-Caltech Analyzing gravity data collected by spacecraft orbiting other worlds reveals groundbreaking insights about planetary structures without having to land on the surface.
Although the Moon and the asteroid Vesta are very different, two NASA studies use the same technique to reveal new details about the interiors of both.
In the lunar study, published May 14 in the journal Nature, researchers developed a new gravity model of the Moon that includes tiny variations in the celestial body’s gravity during its elliptical orbit around Earth. These fluctuations cause the Moon to flex slightly due to Earth’s tidal force — a process called tidal deformation — which provides critical insights into the Moon’s deep internal structure.
Using their model, the researchers produced the most detailed lunar gravitational map yet, providing future missions an improved way to calculate location and time on the Moon. They accomplished this by analyzing data on the motion of NASA’s GRAIL (Gravity Recovery and Interior Laboratory) mission, whose spacecraft, Ebb and Flow, orbited the Moon from Dec. 31, 2011, to Dec. 17, 2012.
These views of the Moon’s near side, left, and far side were put together from observations made by NASA’s Lunar Reconnaissance Orbiter. NASA/JPL-Caltech In a second study, published in the journal Nature Astronomy on April 23, the researchers focused on Vesta, an object in the main asteroid belt between Mars and Jupiter. Using NASA’s Deep Space Network radiometric data and imaging data from the agency’s Dawn spacecraft, which orbited the asteroid from July 16, 2011, to Sept. 5, 2012, they found that instead of having distinct layers as expected, Vesta’s internal structure may be mostly uniform, with a very small iron core or no core at all.
“Gravity is a unique and fundamental property of a planetary body that can be used to explore its deep interior,” said Park. “Our technique doesn’t need data from the surface; we just need to track the motion of the spacecraft very precisely to get a global view of what’s inside.”
Lunar Asymmetry
The lunar study looked at gravitational changes to the Moon’s near and far sides. While the near side is dominated by vast plains — known as mare — formed by molten rock that cooled and solidified billions of years ago, the far side is more rugged, with few plains.
NASA’s Dawn mission obtained this image of the giant asteroid Vesta on July 24, 2011. The spacecraft spent 14 months orbiting the asteroid, capturing more than 30,000 images and fully mapping its surface. NASA/JPL-Caltech/UCLA/MPS/DLR/IDA Both studies were led by Ryan Park, supervisor of the Solar System Dynamics Group at NASA’s Jet Propulsion Laboratory in Southern California, and were years in the making due to their complexity. The team used NASA supercomputers to build a detailed map of how gravity varies across each body. From that, they could better understand what the Moon and Vesta are made of and how planetary bodies across the solar system formed.
Some theories suggest intense volcanism on the near side likely caused these differences. That process would have caused radioactive, heat-generating elements to accumulate deep inside the near side’s mantle, and the new study offers the strongest evidence yet that this is likely the case.
“We found that the Moon’s near side is flexing more than the far side, meaning there’s something fundamentally different about the internal structure of the Moon’s near side compared to its far side,” said Park. “When we first analyzed the data, we were so surprised by the result we didn’t believe it. So we ran the calculations many times to verify the findings. In all, this is a decade of work.”
When comparing their results with other models, Park’s team found a small but greater-than-expected difference in how much the two hemispheres deform. The most likely explanation is that the near side has a warm mantle region, indicating the presence of heat-generating radioactive elements, which is evidence for volcanic activity that shaped the Moon’s near side 2 billion to 3 billion years ago.
Vesta’s Evolution
Park’s team applied a similar approach for their study that focused on Vesta’s rotational properties to learn more about its interior.
“Our technique is sensitive to any changes in the gravitational field of a body in space, whether that gravitational field changes over time, like the tidal flexing of the Moon, or through space, like a wobbling asteroid,” said Park. “Vesta wobbles as it spins, so we could measure its moment of inertia, a characteristic that is highly sensitive to the internal structure of the asteroid.”
Changes in inertia can be seen when an ice skater spins with their arms held outward. As they pull their arms in, bringing more mass toward their center of gravity, their inertia decreases and their spin speeds up. By measuring Vesta’s inertia, scientists can gain a detailed understanding of the distribution of mass inside the asteroid: If its inertia is low, there would be a concentration of mass toward its center; if it’s high, the mass would be more evenly distributed.
Some theories suggest that over a long period, Vesta gradually formed onion-like layers and a dense core. But the new inertia measurement from Park’s team suggests instead that Vesta is far more homogeneous, with its mass distributed evenly throughout and only a small core of dense material, or no core.
Gravity slowly pulls the heaviest elements to a planet’s center over time, which is how Earth ended up with a dense core of liquid iron. While Vesta has long been considered a differentiated asteroid, a more homogenous structure would suggest that it may not have fully formed layers or may have formed from the debris of another planetary body after a massive impact.
In 2016, Park used the same data types as the Vesta study to focus on Dawn’s second target, the dwarf planet Ceres, and results suggested a partially differentiated interior.
Park and his team recently applied a similar technique to Jupiter’s volcanic moon Io, using data acquired by NASA’s Juno and Galileo spacecraft during their flybys of the Jovian satellite as well as from ground-based observations. By measuring how Io’s gravity changes as it orbits Jupiter, which exerts a powerful tidal force, they revealed that the fiery moon is unlikely to possess a global magma ocean.
“Our technique isn’t restricted just to Io, Ceres, Vesta, or the Moon,” said Park. “There are many opportunities in the future to apply our technique for studying the interiors of intriguing planetary bodies throughout the solar system.”
News Media Contacts
Ian J. O’Neill
Jet Propulsion Laboratory, Pasadena, Calif.
818-354-2649
ian.j.oneill@jpl.nasa.gov
Karen Fox / Molly Wasser
NASA Headquarters, Washington
202-358-1600
karen.c.fox@nasa.gov / molly.l.wasser@nasa.gov
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Last Updated May 14, 2025 Related Terms
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By NASA
5 min read
Preparations for Next Moonwalk Simulations Underway (and Underwater)
ICON’s next generation Vulcan construction system 3D printing a simulated Mars habitat for NASA’s Crew Health and Performance Exploration Analog (CHAPEA) missions.ICON One of the keys to a sustainable human presence on distant worlds is using local, or in-situ, resources which includes building materials for infrastructure such as habitats, radiation shielding, roads, and rocket launch and landing pads. NASA’s Space Technology Mission Directorate is leveraging its portfolio of programs and industry opportunities to develop in-situ, resource capabilities to help future Moon and Mars explorers build what they need. These technologies have made exciting progress for space applications as well as some impacts right here on Earth.
The Moon to Mars Planetary Autonomous Construction Technology (MMPACT) project, funded by NASA’s Game Changing Development program and managed at the agency’s Marshall Space Flight Center in Huntsville, Alabama, is exploring applications of large-scale, robotic 3D printing technology for construction on other planets. It sounds like the stuff of science fiction, but demonstrations using simulated lunar and Martian surface material, known as regolith, show the concept could become reality.
Lunar 3D printing prototype.Contour Crafting With its partners in industry and academic institutions, MMPACT is developing processing technologies for lunar and Martian construction materials. The binders for these materials, including water, could be extracted from the local regolith to reduce launch mass. The regolith itself is used as the aggregate, or granular material, for these concretes. NASA has evaluated these materials for decades, initially working with large-scale 3D printing pioneer, Dr. Behrokh Khoshnevis, a professor of civil, environmental and astronautical engineering at the University of Southern California in Los Angeles.
Khoshnevis developed techniques for large-scale extraterrestrial 3D printing under the NASA Innovative Advanced Concepts (NIAC) program. One of these processes is Contour Crafting, in which molten regolith and a binding agent are extruded from a nozzle to create infrastructure layer by layer. The process can be used to autonomously build monolithic structures like radiation shielding and rocket landing pads.
Continuing to work with the NIAC program, Khoshnevis also developed a 3D printing method called selective separation sintering, in which heat and pressure are applied to layers of powder to produce metallic, ceramic, or composite objects which could produce small-scale, more-precise hardware. This energy-efficient technique can be used on planetary surfaces as well as in microgravity environments like space stations to produce items including interlocking tiles and replacement parts.
While NASA’s efforts are ultimately aimed at developing technologies capable of building a sustainable human presence on other worlds, Khoshnevis is also setting his sights closer to home. He has created a company called Contour Crafting Corporation that will use 3D printing techniques advanced with NIAC funding to fabricate housing and other infrastructure here on Earth.
Another one of NASA’s partners in additive manufacturing, ICON of Austin, Texas, is doing the same, using 3D printing techniques for home construction on Earth, with robotics, software, and advanced material.
Construction is complete on a 3D-printed, 1,700-square-foot habitat that will simulate the challenges of a mission to Mars at NASA’s Johnson Space Center in Houston, Texas. The habitat will be home to four intrepid crew members for a one-year Crew Health and Performance Analog, or CHAPEA, mission. The first of three missions begins in the summer of 2023. The ICON company was among the participants in NASA’s 3D-Printed Habitat Challenge, which aimed to advance the technology needed to build housing in extraterrestrial environments. In 2021, ICON used its large-scale 3D printing system to build a 1,700 square-foot simulated Martian habitat that includes crew quarters, workstations and common lounge and food preparation areas. This habitat prototype, called Mars Dune Alpha, is part of NASA’s ongoing Crew Health and Performance Exploration Analog, a series of Mars surface mission simulations scheduled through 2026 at NASA’s Johnson Space Center in Houston.
With support from NASA’s Small Business Innovation Research program, ICON is also developing an Olympus construction system, which is designed to use local resources on the Moon and Mars as building materials.
The ICON company uses a robotic 3D printing technique called Laser Vitreous Multi-material Transformation, in which high-powered lasers melt local surface materials, or regolith, that then solidify to form strong, ceramic-like structures. Regolith can similarly be transformed to create infrastructure capable of withstanding environmental hazards like corrosive lunar dust, as well as radiation and temperature extremes.
The company is also characterizing the gravity-dependent properties of simulated lunar regolith in an experiment called Duneflow, which flew aboard a Blue Origin reusable suborbital rocket system through NASA’s Flight Opportunities program in February 2025. During that flight test, the vehicle simulated lunar gravity for approximately two minutes, enabling ICON and researchers from NASA to compare the behavior of simulant against real regolith obtained from the Moon during an Apollo mission.
Learn more: https://www.nasa.gov/space-technology-mission-directorate/
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Last Updated May 13, 2025 EditorLoura Hall Related Terms
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By NASA
4 min read
Preparations for Next Moonwalk Simulations Underway (and Underwater)
The 2025 internship class at NASA’s Armstrong Flight Research Center in Edwards, California, stand in front of the historic X-1E aircraft on display at the center. From left are interns: Tyler Requa, Gokul Nookula, Madeleine Phillips, Oscar Keiloht Chavez Ramirez, and Nicolas Marzocchetti.NASA/Steve Freeman Lee esta historia en español aquí.
Do you dream of working for NASA and contributing to exploration and innovation for the benefit of humanity? The agency’s internship programs provide high school and college students opportunities to advance NASA’s mission in aeronautics, science, technology, and space.
Claudia Sales, Kassidy McLaughlin, and Julio Treviño started their careers as interns at NASA’s Armstrong Flight Research Center in Edwards, California, where they continue to explore the secrets of the universe. Their journeys highlight the long-term impact of the NASA’s science, technology, engineering, and mathematics (STEM) programs.
Claudia Sales, NASA’s acting X-59 deputy chief engineer and airworthiness certification lead for the quiet supersonic research aircraft, supports ground testing for Acoustic Research Measurements (ARM) flights. The test campaign to evaluate technologies that reduce aircraft noise was conducted at NASA’s Armstrong Flight Research Center in Edwards, California, in 2018.NASA/Ken Ulbrich Claudia Sales
“I knew since I was a child that I wanted to work for NASA,” said Claudia Sales, acting X-59 deputy chief engineer X-59 deputy chief engineer and airworthiness certification lead for the agency’s quiet supersonic research aircraft.
Sales’ journey at NASA started in 2005 as a Pathways intern, a NASA work-study (co-op) program. She worked in propulsion and structures branches and supported such projects as the X-43A hypersonic research aircraft (Hyper-X) and the X-37 reusable orbital launch vehicle, where she had the opportunity to perform calculations for thermal estimations and trajectory analyses. She also completed design work with NASA Armstrong’s Experimental Fabrication Shop.
“It had been a dream of mine to be a part of unique, one-of-a-kind flight research projects,” Sales said. “My mentor was amazing at exposing me to a wide variety of experiences and working on something unique to one day be implemented on an air vehicle to make the world a better place.”
Claudia Sales, NASA’s acting X-59 deputy chief engineer and airworthiness certification lead for the quiet supersonic research aircraft, stands in front of a Gulfstream G-III, also known as Subsonic Research Aircraft Testbed (SCRAT). Sales supported ground testing as test conductor for Acoustics Research Measurements (ARM) flights at NASA’s Armstrong Research Flight Center in Edwards, California, in 2018.NASA/Ken Ulbrich NASA’s flight systems engineer, Kassidy Mclaughlin conducts environmental testing on an instrumentation pallet. The pallet was used during NASA’s National Campaign project in 2020 at NASA’s Armstrong Flight Research Center in Edwards, California.NASA/Lauren Hughes Kassidy McLaughlin
Similarly, flight systems engineer Kassidy McLaughlin discovered that mentorship and hands-on experience as an intern were key to her professional development. She currently leads the development of a ground control station at NASA Armstrong.
In high school and college, McLaughlin enrolled in STEM classes, knowing she wanted to pursue a career in engineering. Encouraged by her mother to apply for a NASA internship, McLaughlin’s career began in 2014 as an intern for NASA Armstrong’s Office of STEM Engagement. She later transitioned to the Pathways program.
“My mentor gave me the tools necessary, and encouraged me to ask questions,” McLaughlin said. “He helped show me that I was capable of anything if I set my mind to it.”
During five rotations as an intern, she worked on the Unmanned Aircraft Systems Integration in the National Airspace System (UAS in the NAS) project. “It is such a rewarding feeling to be in a control room when something you have worked on is flying,” McLaughlin said. That experience inspired her to pursue a career in mechanical engineering.
“NASA Armstrong offered something special when it came to the people,” McLaughlin said. “The culture at the center is so friendly and everyone is so welcoming.”
Julio Treviño, lead operations engineer for NASA’s Global Hawk SkyRange project, stands in front of an F/A-18 mission support aircraft at NASA’s Armstrong Flight Research Center in Edwards, California.NASA/Joshua Fisher Julio Treviño
Julio Treviño, lead operations engineer for NASA’s Global Hawk SkyRange project, ensures airworthiness throughout the planning, integration, and flight phases of unique systems and vehicles. He is also a certified mission controller, mission director, and flight test engineer for various agency aircraft.
Much like McLaughlin, Treviño began his journey in 2018 as a Pathway’s intern for the Dynamic and Controls branch at NASA Armstrong. That experience paved the way for success after graduating with a degree in mechanical engineering.
“As an intern, I had the opportunity to work on designing and creating a battery model for an all-electric aircraft,” Treviño said. “It was officially published as a NASA software model for use by anyone throughout the agency.”
Treviño also credits NASA’s culture and people as the best part of his internship. “I had very supportive mentors throughout my time as an intern and the fact that everyone here genuinely loves the work that they do is awesome,” he said.
2025 Application Deadlines
Every year, NASA provides more than 2,000 students the opportunity to impact the agency’s mission through hands-on internships. The 2025 application for fall is May 16, 2025.
To learn more about NASA’s internship programs, application deadlines, and eligibility, visit https://www.nasa.gov/learning-resources/internship-programs/
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Last Updated May 12, 2025 EditorDede DiniusContactPriscila Valdezpriscila.valdez@nasa.govLocationArmstrong Flight Research Center Related Terms
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By NASA
Artemis II crew members, shown inside the Neil Armstrong Operations and Checkout Building at NASA’s Kennedy Space Center in Florida, stand in front of their Orion crew module on Aug. 8, 2023. Pictured from left are CSA (Canadian Space Agency) astronaut Jeremy Hansen, and NASA astronauts Victor Glover, Reid Wiseman, and Christina Koch.Credit: NASA/Kim Shiflett NASA will host a live Twitch event to highlight the ongoing Moon Mascot Challenge, which invites the public to design a zero gravity indicator for the agency’s Artemis II crewed test flight around the Moon. Viewers will have the opportunity to provide real-time input to an artist who will create an example of a zero gravity indicator during the livestream.
Zero gravity indicators are small, plush items carried aboard spacecraft to provide a visual indication of when the crew reaches space.
The event will begin at 3 p.m. EDT on Tuesday, May 13, on the agency’s official Twitch channel:
https://www.twitch.tv/nasa
The contest invites global creators of all ages to submit design ideas for a zero gravity indicator that will fly aboard the agency’s Artemis II test flight, the first crewed mission under NASA’s Artemis campaign.
Up to 25 finalists, including entries from a K-12 student division, will be selected. The Artemis II crew will choose one design that NASA’s Thermal Blanket Lab will fabricate to fly alongside the crew in the Orion spacecraft.
During this Twitch event, NASA experts will discuss the Moon Mascot Challenge while the artist incorporates live audience feedback into a sample design. Although the design example will not be eligible for the contest, it will demonstrate how challenge participants can develop their own zero gravity indicator designs. The example will be shared on the @NASAArtemis social media accounts following the Twitch event.
The Artemis II test flight will take NASA astronauts Reid Wiseman, Victor Glover, and Christina Koch, and CSA (Canadian Space Agency) astronaut Jeremy Hansen on a 10-day journey around the Moon and back. The mission is another step toward missions on the lunar surface to help the agency prepare for future human missions to Mars.
To learn more about NASA’s missions, visit:
https://www.nasa.gov
-end-
Rachel Kraft
Headquarters, Washington
202-358-1600
rachel.h.kraft@nasa.gov
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Last Updated May 12, 2025 EditorJessica TaveauLocationNASA Headquarters Related Terms
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