NASA’s Perseverance Rover Scours Mars for Science

In addition to drilling rock core samples, the science team has been grinding its way into rocks to make sense of the scientific evidence hiding just below the surface.

On June 3, NASA’s Perseverance Mars rover ground down a portion of a rock surface, blew away the resulting debris, and then went to work studying its pristine interior with a suite of instruments designed to determine its mineralogic makeup and geologic origin. “Kenmore,” as nicknamed by the rover science team, is the 30th Martian rock that Perseverance has subjected to such in-depth scrutiny, beginning with drilling a two-inch-wide (5-centimeter-wide) abrasion patch.  

“Kenmore was a weird, uncooperative rock,” said Perseverance’s deputy project scientist, Ken Farley from Caltech in Pasadena, California. “Visually, it looked fine — the sort of rock we could get a good abrasion on and perhaps, if the science was right, perform a sample collection. But during abrasion, it vibrated all over the place and small chunks broke off. Fortunately, we managed to get just far enough below the surface to move forward with an analysis.”

The science team wants to get below the weathered, dusty surface of Mars rocks to see important details about a rock’s composition and history. Grinding away an abrasion patch also creates a flat surface that enables Perseverance’s science instruments to get up close and personal with the rock.

Time to Grind

NASA’s Mars Exploration Rovers, Spirit and Opportunity, each carried a diamond-dust-tipped grinder called the Rock Abrasion Tool (RAT) that spun at 3,000 revolutions per minute as the rover’s robotic arm pushed it deeper into the rock. Two wire brushes then swept the resulting debris, or tailings, out of the way. The agency’s Curiosity rover carries a Dust Removal Tool, whose wire bristles sweep dust from the rock’s surface before the rover drills into the rock. Perseverance, meanwhile, relies on a purpose-built abrading bit, and it clears the tailings with a device that surpasses wire brushes: the gaseous Dust Removal Tool, or gDRT.

“We use Perseverance’s gDRT to fire a 12-pounds-per-square-inch (about 83 kilopascals) puff of nitrogen at the tailings and dust that cover a freshly abraded rock,” said Kyle Kaplan, a robotic engineer at NASA’s Jet Propulsion Laboratory in Southern California. “Five puffs per abrasion — one to vent the tanks and four to clear the abrasion. And gDRT has a long way to go. Since landing at Jezero Crater over four years ago, we’ve puffed 169 times. There are roughly 800 puffs remaining in the tank.” The gDRT offers a key advantage over a brushing approach: It avoids any terrestrial contaminants that might be on a brush from getting on the Martian rock being studied.

Having collected data on abraded surfaces more than 30 times, the rover team has in-situ science (studying something in its original place or position) collection pretty much down. After gDRT blows the tailings away, the rover’s WATSON (Wide Angle Topographic Sensor for Operations and eNgineering) imager (which, like gDRT, is at the end of the rover’s arm) swoops in for close-up photos. Then, from its vantage point high on the rover’s mast, SuperCam fires thousands of individual pulses from its laser, each time using a spectrometer to determine the makeup of the plume of microscopic material liberated after every zap. SuperCam also employs a different spectrometer to analyze the visible and infrared light that bounces off the materials in the abraded area.

“SuperCam made observations in the abrasion patch and of the powdered tailings next to the patch,” said SuperCam team member and “Crater Rim” campaign science lead, Cathy Quantin-Nataf of the University of Lyon in France. “The tailings showed us that this rock contains clay minerals, which contain water as hydroxide molecules bound with iron and magnesium — relatively typical of ancient Mars clay minerals. The abrasion spectra gave us the chemical composition of the rock, showing enhancements in iron and magnesium.”

Later, the SHERLOC (Scanning Habitable Environments with Raman & Luminescence for Organics & Chemicals) and PIXL (Planetary Instrument for X-ray Lithochemistry) instruments took a crack at Kenmore, too. Along with supporting SuperCam’s discoveries that the rock contained clay, they detected feldspar (the mineral that makes much of the Moon brilliantly bright in sunlight). The PIXL instrument also detected a manganese hydroxide mineral in the abrasion — the first time this type of material has been identified during the mission.  

With Kenmore data collection complete, the rover headed off to new territories to explore rocks — both cooperative and uncooperative — along the rim of Jezero Crater.

“One thing you learn early working on Mars rover missions is that not all Mars rocks are created equal,” said Farley. “The data we obtain now from rocks like Kenmore will help future missions so they don’t have to think about weird, uncooperative rocks. Instead, they’ll have a much better idea whether you can easily drive over it, sample it, separate the hydrogen and oxygen contained inside for fuel, or if it would be suitable to use as construction material for a habitat.”

Long-Haul Roving

On June 19 (the 1,540th Martian day, or sol, of the mission), Perseverance bested its previous record for distance traveled in a single autonomous drive, trekking 1,348 feet (411 meters). That’s about 210 feet (64 meters) more than its previous record, set on April 3, 2023 (Sol 753). While planners map out the rover’s general routes, Perseverance can cut down driving time between areas of scientific interest by using its self-driving system, AutoNav.

“Perseverance drove 4½ football fields and could have gone even farther, but that was where the science team wanted us to stop,” said Camden Miller, a rover driver for Perseverance at JPL. “And we absolutely nailed our stop target location. Every day operating on Mars, we learn more on how to get the most out of our rover. And what we learn today future Mars missions won’t have to learn tomorrow.”

News Media Contact

DC Agle
Jet Propulsion Laboratory, Pasadena, Calif.
818-393-9011
agle@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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Anthony Greicius

NASA to Welcome Fourth Private Astronaut Mission to Space Station

As part of NASA’s efforts to expand access to space, four private astronauts are in orbit following the successful launch of the fourth all private astronaut mission to the International Space Station.

A SpaceX Dragon spacecraft lifted off at 2:31 a.m. EDT Wednesday from Launch Complex 39A at NASA’s Kennedy Space Center in Florida, carrying Axiom Mission 4 crew members Peggy Whitson, former NASA astronaut and director of human spaceflight at Axiom Space as commander, ISRO (Indian Space Research Organisation) astronaut and pilot Shubhanshu Shukla, and mission specialists ESA (European Space Agency) project astronaut Sławosz Uznański-Wiśniewski of Poland and HUNOR (Hungarian to Orbit) astronaut Tibor Kapu of Hungary.

“Congratulations to Axiom Space and SpaceX on a successful launch,” said NASA acting Administrator Janet Petro. “Under President Donald Trump’s leadership, America has expanded international participation and commercial capabilities in low Earth orbit. U.S. industry is enabling astronauts from India, Poland, and Hungary to return to space for the first time in over forty years. It’s a powerful example of American leadership bringing nations together in pursuit of science, discovery, and opportunity.”

A collaboration between NASA and ISRO allowed Axiom Mission 4 to deliver on a commitment highlighted by President Trump and Indian Prime Minister Narendra Modi to send the first ISRO astronaut to the station. The space agencies are participating in five joint science investigations and two in-orbit science, technology, engineering, and mathematics demonstrations. NASA and ISRO have a long-standing relationship built on a shared vision to advance scientific knowledge and expand space collaboration.

This mission serves as an example of the success derived from collaboration between NASA’s international partners and American commercial space companies.

Live coverage of the spacecraft’s arrival will begin at 5 a.m., Thursday, June 26, on NASA+. Learn how to watch NASA content through a variety of platforms, including social media.

The spacecraft is scheduled to autonomously dock at approximately 7 a.m. to the space-facing port of the space station’s Harmony module.

Once aboard the station, Expedition 73 crew members, including NASA astronauts, Nicole Ayers, Anne McClain, and Jonny Kim, JAXA (Japan Aerospace Exploration Agency) astronaut Takuya Onishi, and Roscosmos cosmonauts Kirill Peskov, Sergey Ryzhikov, and Alexey Zubritsky will welcome the astronauts.

The crew is scheduled to remain at the space station, conducting microgravity research, educational outreach, and commercial activities for about two weeks before a return to Earth and splashdown off the coast of California.

The International Space Station is a springboard for developing a low Earth economy. NASA’s goal is to achieve a strong economy off the Earth where the agency can purchase services as one of many customers to meet its science and research objectives in microgravity. NASA’s commercial strategy for low Earth orbit provides the government with reliable and safe services at a lower cost, empowers U.S. industry, and enables the agency to focus on Artemis missions to the Moon in preparation for Mars while also continuing to use low Earth orbit as a training and proving ground for those deep space missions.

Learn more about NASA’s commercial space strategy at:

https://www.nasa.gov/commercial-space

-end-

Josh Finch
Headquarters, Washington
202-358-1100
joshua.a.finch@nasa.gov

Anna Schneider
Johnson Space Center, Houston
281-483-5111
anna.c.schneider@nasa.gov

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Tiernan P. Doyle

NASA Sets Coverage for Axiom Mission 4 Launch, Arrival at Station

NASA, Axiom Space, and SpaceX are targeting 2:31 a.m. EDT, Wednesday, June 25, for launch of the fourth private astronaut mission to the International Space Station, Axiom Mission 4.

The mission will lift off from Launch Complex 39A at NASA’s Kennedy Space Center in Florida. The crew will travel to the orbiting laboratory on a new SpaceX Dragon spacecraft after launching on the company’s Falcon 9 rocket. The targeted docking time is approximately 7 a.m. Thursday, June 26.

This launch opportunity comes after NASA and Roscosmos officials discussed the status of the recent repair work in the transfer tunnel at the aft (back) most segment of the orbital laboratory’s Zvezda service module. Based on the evaluations, NASA and Roscosmos agreed to further lower the pressure in the transfer tunnel to 100 millimeters of mercury, and teams will continue to evaluate going forward. Safety remains a top priority for NASA and Roscosmos.

“NASA and Roscosmos have a long history of cooperation and collaboration on the International Space Station. This professional working relationship has allowed the agencies to arrive at a shared technical approach and now Axiom Mission 4 launch and docking will proceed,” said acting NASA Administrator Janet Petro. “We look forward to the launch with Axiom Space and SpaceX for this commercial international mission.”

For this mission, NASA is responsible for integrated operations, which begins during the spacecraft’s approach to the space station, continues during the crew’s stay aboard the orbiting laboratory conducting science, education, and commercial activities, and concludes once the spacecraft departs the station.

Live coverage of launch and arrival activities will stream on NASA+. Learn how to watch NASA content through a variety of platforms, including social media.

Peggy Whitson, former NASA astronaut and director of human spaceflight at Axiom Space, will command the commercial mission, while ISRO (Indian Space Research Organisation) astronaut Shubhanshu Shukla will serve as pilot. The two mission specialists are ESA (European Space Agency) project astronaut Sławosz Uznański-Wiśniewski of Poland, and HUNOR (Hungarian to Orbit) astronaut Tibor Kapu of Hungary.

Once docked, the private astronauts plan to spend about two weeks aboard the orbiting laboratory, conducting a mission comprised of science, outreach, and commercial activities.

As part of a collaboration between NASA and ISRO, Axiom Mission 4 delivers on a commitment highlighted by President Donald Trump and Indian Prime Minister Narendra Modi to send the first ISRO astronaut to the station. The space agencies are participating in five joint science investigations and two in-orbit STEM (science, technology, engineering, and mathematics) demonstrations. NASA and ISRO have a long-standing relationship built on a shared vision to advance scientific knowledge and expand space collaboration.

The private mission also carries the first astronauts from Poland and Hungary to stay aboard the International Space Station.

NASA’s mission coverage is as follows (all times Eastern and subject to change based on real-time operations):

Wednesday, June 25

12:30 a.m. – Axiom Space and SpaceX launch coverage begins.

1:40 a.m. – NASA joins the launch coverage on NASA+.

2:31 a.m. – Launch

NASA will end coverage following orbital insertion, which is approximately 15 minutes after launch. As it is a commercial launch, NASA will not provide a clean launch feed on its channels.

Thursday, June 26

5 a.m. – Arrival coverage begins on NASA+, Axiom Space, and SpaceX channels.

7 a.m. – Targeted docking to the space-facing port of the station’s Harmony module.

Arrival coverage will continue through hatch opening and welcome remarks.

All times are estimates and could be adjusted based on real-time operations after launch. Follow the space station blog for the most up-to-date operations information.

The International Space Station is a springboard for developing a low Earth economy. NASA’s goal is to achieve a strong economy off the Earth where the agency can purchase services as one of many customers to meet its science and research objectives in microgravity. NASA’s commercial strategy for low Earth orbit provides the government with reliable and safe services at a lower cost, enabling the agency to focus on Artemis missions to the Moon in preparation for Mars while also continuing to use low Earth orbit as a training and proving ground for those deep space missions.

Learn more about NASA’s commercial space strategy at:

https://www.nasa.gov/commercial-space

-end-

Joshua Finch
Headquarters, Washington
202-358-1100
joshua.a.finch@nasa.gov

Anna Schneider
Johnson Space Center, Houston
281-483-5111
anna.c.schneider@nasa.gov

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Tiernan P. Doyle

NASA Astronaut Zena Cardman

NASA astronaut Zena Cardman inspects her spacesuit’s wrist mirror in this portrait taken at NASA’s Johnson Space Center in Houston on March 22, 2024. Cardman will launch to the International Space Station as part of NASA’s SpaceX Crew-11 mission. This will be her first spaceflight.

Cardman was selected by NASA as a member of the 2017 “Turtles” Astronaut Class. The Virginia native holds a bachelor’s degree in biology and a master’s degree in marine sciences from the University of North Carolina, Chapel Hill. Her research focused primarily on geobiology and geochemical cycling in subsurface environments, from caves to deep sea sediments. Cardman’s experience includes multiple Antarctic expeditions. Since completing initial training, Cardman has supported real-time station operations and lunar surface exploration planning.

This photo was one of the winners of NASA’s 2024 Photos of the Year.

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Gary Daines

NICER Status Updates

June 24, 2025

NASA’s NICER (Neutron star Interior Composition Explorer), an X-ray telescope on the International Space Station, has paused observations due to a problem with one of the motors that drives its ability to track cosmic objects.

The NICER team paused operations June 17 when performance degradation in the motor began affecting science observations. Engineers are investigating the cause and potential solutions.

The telescope was installed near the space station’s starboard solar array in 2017. The NICER mission has successfully demonstrated a form of deep space navigation that could be used for travel to Mars and beyond. It has also made groundbreaking measurements of neutron stars, which contain the densest matter in the universe that we can measure, and revolutionized our understanding of black holes, active galaxies, and other mysterious phenomena in our universe.

April 17, 2025

Following Repair, NASA’s NICER Improves Daytime Measurements

A NASA X-ray telescope on the International Space Station called NICER, or Neutron star Interior Composition Explorer, has regained additional daytime observation capabilities thanks to repairs completed during a spacewalk and a reconfiguration of its detectors.

In May 2023, NICER developed a light leak in which unwanted sunlight began entering the instrument. Photos taken from inside the space station revealed several small areas of damage to the telescope’s thin thermal shields, which block sunlight while allowing X-rays through to the detectors. Nighttime observations were unaffected, and with operational adjustments, the NICER team was able to recover about 20% of station daytime observations.

In January, NASA astronaut Nick Hague installed nine patches to cover the largest areas of damage during a spacewalk. After resuming science operations, the NICER team determined the overall level of sunlight inside NICER had substantially reduced. Still, it experienced more visible-light interference than expected.

Close-up, high-resolution photos from the spacewalk allowed the team to see additional small holes and cracks in the thermal shields that were not previously visible. These accounted for the remaining sunlight intrusion.

After further analysis, the NICER team developed a novel approach to regaining additional daytime data collection.

Each X-ray that hits a NICER detector generates electrical charge that is sensed by a measurement/power unit (MPU). After so many hits, the detector resets — like emptying a cup before it overflows.

Sunlight can also create charge that accumulates in the detector, adding water to the metaphorical cup. There was so much sunlight entering NICER that the detectors were filling up with charge and resetting thousands of times for every X-ray detection. It overwhelmed the MPU’s ability to process the valid X-ray events.

Hague’s repair in January reduced the amount of sunlight entering NICER, which enabled the team to reconfigure the MPUs to ignore the sunlight-generated resets. After initial testing on the ground, the team updated one MPU before switching all seven. The changeover was completed March 12.

In combination with the patches, the reconfiguration has allowed NICER to return to collecting observations during more than 70% of station daytime, as the telescope continues to help us better understand the X-ray universe, including neutron stars, black holes, and other energetic phenomena. The team continues to look for more opportunities to improve NICER’s operations.

Jan. 24, 2025

NASA’s NICER Continues Science Operations Post Repair

NASA crew aboard the International Space Station installed patches to the agency’s NICER (Neutron star Interior Composition Explorer) mission during a spacewalk on Jan. 16. NICER, an X-ray telescope perched near the station’s starboard solar array, resumed science operations later the same day.

The patches cover areas of NICER’s thermal shields where damage was discovered in May 2023. These thin filters block sunlight while allowing X-rays to pass through. After the discovery, the NICER team restricted their observations during the station’s daytime to avoid overwhelming the mission’s sensitive detectors. Nighttime observations were unaffected, and the team was able to continue collecting data for the science community to make groundbreaking measurements using the instrument’s full capabilities.

The repair went according to plan. Data since collected shows the detectors behind the patched areas are performing better than before during station night, and the overall level of sunlight inside NICER during the daytime is reduced substantially.

While NICER experiences less interference from sunlight than before, after analyzing initial data, the team has determined the telescope still experiences more interference than expected. The installed patches cover areas of known damage identified using astronomical observations and from photos taken by both external robotic cameras and astronauts inside the space station. Measurements collected since the repair and close-up, high-resolution photos obtained during the spacewalk are providing new information that may point the way toward further daytime data collection.

In the meantime, NICER continues operations with its full measurement capabilities during orbit night to enable further trailblazing discoveries in time domain and multimessenger astrophysics.

June 8, 2023

Sunlight ‘Leak’ Impacting NASA’s NICER Telescope, Science Continues

On Tuesday, May 22, NASA’s NICER (Neutron Star Interior Composition Explorer), an X-ray telescope on the International Space Station, developed a “light leak,” in which unwanted sunlight enters the instrument. While analyzing incoming data since then, the team identified an impact to daytime observations. Nighttime observations seem to be unaffected.

The team suspects that at least one of the thin thermal shields on NICER’s 56 X-ray Concentrators has been damaged, allowing sunlight to reach its sensitive detectors.

To mitigate the effects on measurements, the NICER team has limited daytime observations to objects far away from the Sun’s position in the sky. The team has also updated commands to NICER that automatically lower its sensitivity during the orbital day to reduce the effects from sunlight contamination. The team is evaluating these changes and assessing additional measures to reduce the impact on science observations.

To date, more than 300 scientific papers have used NICER observations, and the team is confident that NICER will continue to produce world-class science.

Media contacts

Alise Fisher
202-358-2546
alise.m.fisher@nasa.gov
NASA Headquarters, Washington

Claire Andreoli
301-286-1940
claire.andreoli@nasa.gov
NASA’s Goddard Space Flight Center, Greenbelt, Md.

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Jeanette Kazmierczak