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By NASA
6 min read
Preparations for Next Moonwalk Simulations Underway (and Underwater)
This mosaic showing the Martian surface outside of Jezero Crater was taken by NASA’s Perseverance on Dec. 25, 2024, at the site where the rover cored a sample dubbed “Silver Mountain” from a rock likely formed during Mars’ earliest geologic period.NASA/JPL-Caltech/ASU/MSSS The diversity of rock types along the rim of Jezero Crater offers a wide glimpse of Martian history.
Scientists with NASA’s Perseverance rover are exploring what they consider a veritable Martian cornucopia full of intriguing rocky outcrops on the rim of Jezero Crater. Studying rocks, boulders, and outcrops helps scientists understand the planet’s history, evolution, and potential for past or present habitability. Since January, the rover has cored five rocks on the rim, sealing samples from three of them in sample tubes. It’s also performed up-close analysis of seven rocks and analyzed another 83 from afar by zapping them with a laser. This is the mission’s fastest science-collection tempo since the rover landed on the Red Planet more than four years ago.
Perseverance climbed the western wall of Jezero Crater for 3½ months, reaching the rim on Dec. 12, 2024, and is currently exploring a roughly 445-foot-tall (135-meter-tall) slope the science team calls “Witch Hazel Hill.” The diversity of rocks they have found there has gone beyond their expectations.
“During previous science campaigns in Jezero, it could take several months to find a rock that was significantly different from the last rock we sampled and scientifically unique enough for sampling,” said Perseverance’s project scientist, Katie Stack Morgan of NASA’s Jet Propulsion Laboratory in Southern California. “But up here on the crater rim, there are new and intriguing rocks everywhere the rover turns. It has been all we had hoped for and more.”
One of Perseverance’s hazard cameras captured the rover’s coring drill collecting the “Main River” rock sample on “Witch Hazel Hill” on March 10, 2025, the 1,441st Martian day, or sol, of the mission. NASA/JPL-Caltech That’s because Jezero Crater’s western rim contains tons of fragmented once-molten rocks that were knocked out of their subterranean home billions of years ago by one or more meteor impacts, including possibly the one that produced Jezero Crater. Perseverance is finding these formerly underground boulders juxtaposed with well-preserved layered rocks that were “born” billions of years ago on what would become the crater’s rim. And just a short drive away is a boulder showing signs that it was modified by water nestled beside one that saw little water in its past.
Oldest Sample Yet?
Perseverance collected its first crater-rim rock sample, named “Silver Mountain,” on Jan. 28. (NASA scientists informally nickname Martian features, including rocks and, separately, rock samples, to help keep track of them.) The rock it came from, called “Shallow Bay,” most likely formed at least 3.9 billion years ago during Mars’ earliest geologic period, the Noachian, and it may have been broken up and recrystallized during an ancient meteor impact.
About 360 feet (110 meters) away from that sampling site is an outcrop that caught the science team’s eye because it contains igneous minerals crystallized from magma deep in the Martian crust. (Igneous rocks can form deep underground from magma or from volcanic activity at the surface, and they are excellent record-keepers — particularly because mineral crystals within them preserve details about the precise moment they formed.) But after two coring attempts (on Feb. 4 and Feb. 8) fizzled due to the rock being so crumbly, the rover drove about 520 feet (160 meters) northwest to another scientifically intriguing rock, dubbed “Tablelands.”
Data from the rover’s instruments indicates that Tablelands is made almost entirely of serpentine minerals, which form when large amounts of water react with iron- and magnesium-bearing minerals in igneous rock. During this process, called serpentinization, the rock’s original structure and mineralogy change, often causing it to expand and fracture. Byproducts of the process sometimes include hydrogen gas, which can lead to the generation of methane in the presence of carbon dioxide. On Earth, such rocks can support microbial communities.
Coring Tablelands went smoothly. But sealing it became an engineering challenge.
Sealing the “Green Gardens” sample — collected by NASA’s Perseverance Mars rover from a rock dubbed “Tablelands” along the rim of Jezero Crater on Feb. 16, 2025 — pre-sented an engineering challenge. The sample was finally sealed on March 2.NASA/JPL-Caltech/ASU/MSSS Flick Maneuver
“This happened once before, when there was enough powdered rock at the top of the tube that it interfered with getting a perfect seal,” said Kyle Kaplan, a robotics engineer at JPL. “For Tablelands, we pulled out all the stops. Over 13 sols,” or Martian days, “we used a tool to brush out the top of the tube 33 times and made eight sealing attempts. We even flicked it a second time.”
During a flick maneuver, the sample handling arm — a little robotic arm in the rover’s belly — presses the tube against a wall inside the rover, then pulls the tube away, causing it to vibrate. On March 2, the combination of flicks and brushings cleaned the tube’s top opening enough for Perseverance to seal and store the serpentine-laden rock sample.
Eight days later, the rover had no issues sealing its third rim sample, from a rock called “Main River.” The alternating bright and dark bands on the rock were like nothing the science team had seen before.
Up Next
Following the collection of the Main River sample, the rover has continued exploring Witch Hazel Hill, analyzing three more rocky outcrops (“Sally’s Cove,” “Dennis Pond,” and “Mount Pearl”). And the team isn’t done yet.
“The last four months have been a whirlwind for the science team, and we still feel that Witch Hazel Hill has more to tell us,” said Stack. “We’ll use all the rover data gathered recently to decide if and where to collect the next sample from the crater rim. Crater rims — you gotta love ’em.”
More About Perseverance
A key objective for Perseverance’s mission on Mars is astrobiology, including the search for signs of ancient microbial life. The rover is characterizing the planet’s geology and past climate, to help pave the way for human exploration of the Red Planet and is the first mission to collect and cache Martian rock and regolith.
NASA’s Mars Sample Return Program, in cooperation with ESA (European Space Agency), is designed to send spacecraft to Mars to collect these sealed samples from the surface and return them to Earth for in-depth analysis.
The Mars 2020 Perseverance mission is part of NASA’s Mars Exploration Program portfolio and the agency’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, managed for the agency by Caltech in Pasadena, California, built and manages operations of the Perseverance rover.
For more about Perseverance:
https://science.nasa.gov/mission/mars-2020-perseverance
News Media Contacts
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
2025-051
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Last Updated Apr 10, 2025 Related Terms
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By NASA
As an Air Force veteran from Spartanburg, South Carolina, Alex Olley now serves as a contract specialist in the International Space Station Procurement Office at NASA’s Johnson Space Center in Houston.
Olley joined NASA as a Pathways intern in January 2023 to turn his lifelong goal into a reality—bringing his unique experience in the defense and space industries to support one of humanity’s most ambitious endeavors.
Official portrait of Alex Olley.NASA Olley manages the procurement of supplies, services, and research for the International Space Station. His role requires sharp attention to federal regulations and a deep understanding of business practices, all while supporting the astronauts who live and work 250 miles above Earth.
“I take great pride in the opportunity that I get to contribute to NASA’s mission each day,” he said. “I’m incredibly grateful for my time here, and it feels like a significant achievement, especially because many of my friends and family have shared how inspired they are to pursue their own goals as a result.”
Alex Olley prepares for an Air Force training at Osan Air Base in Pyeongtaek City, South Korea. Image courtesy of Alex Olley A quote shared by Johnson’s director of the Office of Procurement, Bradley Niese, became a guiding principle that has shaped Olley’s NASA experience: “People are the mission, and if we take care of the people, the mission will take care of itself.”
That mindset has taught him the value of building relationships within the office, which, he says, often leads to smoother operations and greater motivation.
“It’s much easier to be passionate about the mission when you know everyone around you shares the same dedication,” he said. “With such a strong support system, I’ve learned that I can achieve anything, no matter how challenging or confusing the task may seem at first.”
Early on, however, he struggled with imposter syndrome. “I felt like I didn’t belong or wasn’t good enough to contribute meaningfully toward our goals,” said Olley. “I overcame that feeling by taking a chance and sharing my thoughts on a work process.”
To his surprise, his team embraced the idea—and implemented it. That moment became a turning point, eventually leading to Olley becoming one of the office leaders for a wellness initiative called Better toGether—a creative nod to their office code, “BG.” The program was designed to promote physical and mental well-being in the workplace through activities like NASA Moves, an agencywide challenge that encourages employees to track their steps and commit to at least 20 minutes of physical activity each day. Twice a week, Olley leads brief team meetings focused on desk-friendly wellness tips such as stretches to prevent carpal tunnel and improve posture.
Alex Olley records a YouTube video at Rocket Park about how to become a NASA intern.Image courtesy of Alex Olley As NASA looks toward the Moon and Mars through Artemis, Olley is focused on uplifting the Artemis Generation.
“I want to pass on my perspective on Johnson’s mission: Dare, Unite, and Explore,” he said. “DARE to take on the challenge and face it head on, UNITE with your peers, and never be afraid to EXPLORE the unknown.”
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By NASA
Curiosity Navigation Curiosity Home Mission Overview Where is Curiosity? Mission Updates Science Overview Instruments Highlights Exploration Goals News and Features Multimedia Curiosity Raw Images Images Videos Audio Mosaics More Resources Mars Missions Mars Sample Return Mars Perseverance Rover Mars Curiosity Rover MAVEN Mars Reconnaissance Orbiter Mars Odyssey More Mars Missions Mars Home 5 min read
Sols 4473-4474: So Many Rocks, So Many Textures!
NASA’s Mars rover Curiosity acquired this image using its Chemistry & Camera (ChemCam) of a boulder about 40 meters (about 131 feet) away from the rover at the time. Curiosity acquired the image, showing the variety of structures and textures around the rover, on March 5, 2025 — sol 4471, or Martian day 4,471 of the Mars Science Laboratory mission — at 01:47:03 UTC. NASA/JPL-Caltech/LANL Written by Susanne Schwenzer, Planetary Geologist at The Open University
Earth planning date: Wednesday, March 5, 2025
The Martian landscape never ceases to amaze me, there is so much variation in texture and color! As a mineralogist, I marvel at them, but my colleagues trained in sedimentology regularly teach me how to see even more than the beauty of them: they can discern whether the materials that make up a rock were transported and laid down by the action of water or wind. The image above shows a rather unusual texture alongside more normal-looking laminated rocks. Just compare the small, brighter block in the foreground with the darker bigger rock in the center of the image. How should we interpret it? Well, that jury is still out. Are they sedimentary textures formed when the rock first was laid down, or shortly after, or are they textures that formed much later when water entered the rock and formed new minerals in the already existing rock? The latter would be more my area of research, and they are often called concretions. And I vividly remember the first concretions a rover ever found, the “blueberries.” Curiosity, of course, found many concretions, too. There is an interesting comparison between rocks that the Mars Exploration rover Opportunity found, and the one that Curiosity found very early in the mission, back at Yellowknife Bay. We have seen many more since, and the above might be another example.
The landscape directly around the rover today also has some interesting textures and, most important, some more regular-looking bedrock targets. Bedrock is what the team perceives to be the rocks that make up the part of the hill we are driving through. The dark blocks, like the one above, that are also strewn occasionally in the path of the rover are called float rocks, and we always look higher up into the hills to find out where they might have come from. As interesting as all those blocks and boulders are, they pose a huge challenge for the rover drivers. Today, they had managed to get us all the way to the intended stopping point, which in itself is a huge achievement. A mixture of large rocks and sand is just not conducive to any form of travel, and I always wonder how tiring it would be to just walk through the area. But we made it to the intended stopping point, driving just under 20 meters (about 65 feet), as intended. Unfortunately though, one of the rover’s wheels was perched on a rock in ways that posed a risk of dropping off that rock during an arm move. So, as is usual in those cases, we accept that contact science is not possible. The risk would just be too great that the rover moves just at the wrong moment and the arm bumps into the rock that an instrument is investigating at that moment. So, safety first, we decided to keep the arm tucked in and focus on remote science.
The team quickly pivoted to add some remote science to the already existing observations. As you might imagine in a terrain as interesting as this, Mastcam did get a workout. There are seven different observations in the plan! It looks into the distance to the Texoli Butte we are observing as we drive along it, and at a target, “Brown Mountain.” Looking into the many different features are also imaging activities on the targets “Placerita Canyon,” “Humber Park,” and two others just named “trough,” which is a descriptive term for little trough features the team is tracking for a while with the quest to better understand their formation. ChemCam has a LIBS investigation on target “Inspiration Point,” and two long-distance RMI (Remote Micro Imager) observations. One is truly at a long distance on Gould Mesa, another of the mounts we are observing as we go along. There is another RMI activity closer to the rover, to investigate more of those very interesting structures.
We also have environmental observations in the plan, observing the opacity of the atmosphere and of REMS investigations are occurring throughout the plan. REMS is our “weather station” measuring atmospheric pressure, temperature, humidity, winds, and ultraviolet radiation levels. DAN looks at the surface to measure the water and chlorine content in the rocks that the rover traverses over and RAD is looking up to the sky to measure the radiation that reaches the Martian surface. We do not often mention those in our blocks, because we are so used to seeing them there every single sol, doing their job, quietly in the background.
With so much to do, the only remaining question was where to drive. That was discussed at length, weighing the different science reasons to go to places along the path, and after much deliberation we decided to go to one of the float rocks, but reserve the option to make a right turn in the next plan, to get to another interesting place. All those discussions are so important to make sure we are making the most of the power we have at this cold time of the year, and getting all the science we can get. I am excited to see the data from today’s plan… and to find out where we end up. Not with a wheel on a rock, please, Mars — that would be a good start. But if we do, I am absolutely confident there will be lots to investigate anyway!
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Last Updated Mar 06, 2025 Related Terms
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Explore This Section Mars Home Science Overview Objectives Instruments Highlights Exploration Goals News and Features Multimedia Perseverance Raw Images Images Videos Audio More Resources Mars Missions Mars Sample Return Mars Perseverance Rover Mars Curiosity Rover MAVEN Mars Reconnaissance Orbiter Mars Odyssey More Mars Missions Perseverance Home Mission Overview Rover Components Mars Rock Samples Where is Perseverance? Ingenuity Mars Helicopter Mission Updates 2 min read
Gardens on Mars? No, Just Rocks!
NASA’s Mars Perseverance rover acquired this image of the area in front of it, showing the Serpentine Lake abrasion patch on the right-hand-side of the rock, with the Green Gardens sampling location on the left. The rover used its onboard Front Right Hazard Avoidance Camera A, and captured the image on Feb. 16, 2025 (sol 1420, or Martian day 1,420 of the Mars 2020 mission) at the local mean solar time of 16:45:19. NASA/JPL-Caltech Over the past week, Perseverance has been parked at a location called “Tablelands,” an area containing the “Serpentine Lake” abrasion patch acquired a few weeks ago. The Mars 2020 team has been diligently analyzing the data from the abrasion patch, and these findings led to the decision to return to Tablelands and attempt a sample at this location. Due to the disaggregated material thwarting our last sample attempt at “Cat Arm Reservoir,” the team was eagerly awaiting results from this sampling attempt at a target called “Green Gardens.”
Then, very early Monday morning, the CacheCam images came down confirming that Perseverance had collected another core on Mars! The team will be working next on sealing this sample tube.
NASA’s Mars Perseverance rover acquired this image using its onboard Sample Caching System Camera (CacheCam), located inside the rover underbelly. It looks down into the top of a sample tube to take close-up pictures of the sampled material and the tube as it’s prepared for sealing and storage. The material seen inside the coring bit is the Green Gardens sample. This image was acquired on Feb. 17, 2025 (sol 1420, or Martian day 1,420 of the Mars 2020 mission) at the local mean solar time of 19:16:24. NASA/JPL-Caltech Tablelands, the rock from which the Green Gardens core comes, is exciting to the Science Team because it contains serpentine minerals. These serpentine minerals likely formed several billion years ago when water interacted with rocks before Jezero crater formed. Water altered the minerals originally present in the rock into serpentine, which is often green in color. This characteristic green color is why the team chose the name “Green Gardens” for this sample target. These minerals are especially exciting because their structure and composition can tell us about the history of water on Mars. The formation of serpentine on Earth can support microbial communities, and the same might have been true on Mars. A sample like this from the Jezero crater rim is an important piece of the puzzle to Jezero’s watery past!
Perseverance is planning to conclude its time at Serpentine Lake with more science observations of the Tablelands outcrop. These measurements could include a reexamination of the Serpentine Lake abrasion patch and analysis of the tailings pile produced by the Green Gardens drill. After snaking around this area for a couple weeks, our next drives will take us further down the slope of the crater rim. We’ll head toward our next stop at a site called “Broom Point,” where more exciting discoveries await!
Written by Eleanor Moreland, Ph.D. Student Collaborator at Rice University
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Last Updated Feb 24, 2025 Related Terms
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Sols 4398-4401: Holidays Ahead, Rocks Under the Wheels
NASA’s Mars rover Curiosity acquired this image using its Left Navigation Camera on Dec. 17, 2024, at 23:24:13 UTC — Sol 4396, or Martian day 4,396, or the Mars Science Laboratory mission. NASA/JPL-Caltech Earth planning date: Wednesday, Dec. 18, 2024
It’s almost holiday time, and preparations are going ahead on Earth and Mars! For myself that means having a packed suitcase sitting behind me to go on my holiday travels tomorrow morning. For Curiosity that means looking forward to a long semi-rest, as we will not do our usual planning for the geology and mineralogy, but will still be monitoring the atmospheric conditions throughout. Today should have been a normal planning day with lots of contact and remote science. Well, Mars had other ideas.
The regular readers of this blog know that we are driving through quite difficult terrain. The image above gives a good impression on what the rover is dealing with: lots of rocks embedded in sand. I think even hiking would be quite difficult there, let alone driving autonomously. Curiosity, thanks to our excellent rover drivers, makes it successfully most of the time, but here and there Mars just doesn’t play nice. Thus, the rover stopped after 14 meters (about 46 feet) of a planned much longer drive. One of the wheels had caught a low spot between two rocks, and — safety first — the rover stopped and waited for our assessment. The rover drivers found no major problem, as it’s just the middle wheel that hit a bit of a rough patch, and driving can continue in this plan. But better safe than sorry, especially on another planet where there are no tow trucks to get us out of difficulty!
There was, however, quite a bit of discussion before we decided that course of action. Not because of the wheels themselves, but because the rover also stands in a position where it can only communicate directly with Earth in limited ways as the antenna is not facing the expected direction after the sudden stop. Of course, we still have the orbiters to talk to our rover, so we know it’s all fine. And — all things are three — this all happened on the penultimate plan of the year! Friday we’ll be planning a large set of sols that the rover will be executing on its own on Mars, monitoring the atmosphere and taking regular images of its surroundings, while the Earth-based team enjoys the well-deserved break. We really want to make sure to have everything going right on a day like today, so we all can enjoy the holidays without worrying about the rover!
With today being the last day of normal science planning, we had lots of ideas, but had to keep the arm stowed. The drive fault also meant that we had to forego arm movements, as the rover was sitting on a few rocks, and one of the wheels in that little depression that stopped us, all in ways that meant that a shift of rover weight (such as occurs when we move the arm) could make the rover move. Avoiding this situation, the team kept the arm stowed and focused on remote observations today. ChemCam observes a vein target called “Monrovia Peak” and takes remote images on the target “Jawbone Canyon” and up Mount Sharp toward the yardang unit. Mastcam looks at the target “Circle X Ranch” to investigate the material around the rocks embedded in the sand, looks at “Anacapa Island,” which is a vein target, “Channel Islands,” which is an aeolian ripple, and target “Gould Mesa,” which gets the team especially excited as this is the first glimpse of the so-called boxwork structures, which we saw from orbit even before Curiosity landed. Finally, we drive away from the spot that held us up today. Let’s hope Mars has read the script this time!
For the looooong break, we are planning autonomous and remote investigations only, and this starts before Friday’s planning, so that we know all is ok! Thus, the other three sols in today’s planning have Aegis, the automated ChemCam LIBS observation, a Mastcam 360° mosaic, and many, many atmospheric observations. It’s going to be a feast for DAN, REMS, and generally the atmospheric science on Mars, while here on Earth we enjoy the treats of the season. The Curiosity team hopes you do, too. See you in 2025!
Written by Susanne Schwenzer, Planetary Geologist at The Open University
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Last Updated Dec 20, 2024 Related Terms
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