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Sols 4468-4470: A Wintry Mix of Mars Science
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By NASA
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Preparations for Next Moonwalk Simulations Underway (and Underwater)
On April 16, 2025, the Earth Science Division at NASA’s Ames Research Center in Silicon Valley held an Earth Science Showcase to share its work with the center and their families. As part of this event, kids were invited to share something they like about the Earth. These are their masterpieces.
Sora U. Age 9. “Wildlife”
Sora U. Age 9. “Wildlife” Wesley P. Age 2.5. “Pale Blue”
Wesley P. Age 2.5. “Pale Blue” Kira U. Age 5. “Hawaii”
Kira U. Age 5. “Hawaii” Anonymous. “eARTh”
Anonymous. “eARTh” Brooks P. Age 8mo. “Squiggles”
Brooks P. Age 8mo. “Squiggles” About the Author
Milan Loiacono
Science Communication SpecialistMilan Loiacono is a science communication specialist for the Earth Science Division at NASA Ames Research Center.
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Last Updated Apr 25, 2025 Related Terms
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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 3 min read
Sols 4520-4521: Prinzregententorte
NASA’s Mars rover Curiosity acquired this image of its target area — including the layered rocks “Hale Telescope” and “Fan Palm” — using its Front Hazard Avoidance Camera on April 22, 2025 (Sol 4518, or Martian day 4,518 of the Mars Science Laboratory mission) at 11:03:37 UTC. NASA/JPL-Caltech Written by Scott VanBommel, Planetary Scientist at Washington University
Earth planning date: Wednesday, April 23, 2025
I will start this blog with an apology, an apology because I suspect, by the end of this post, you, the reader, may have a craving for chocolate, or cake, or both. While we saw hints of it in the previous workspace, as captured by Susanne’s blog, today’s workspace featured prominent laminations throughout Curiosity’s sightlines, which presented the science team with the challenge of finding a safe place to utilize APXS (and MAHLI). Perhaps it was because of Easter last weekend, perhaps I needed an early lunch — whatever the cause, I could not shake the visual parallels between the rocks in our workspace, as captured in this blog’s image, and a many-layered-cake such as a Prinzregententorte.
The rover planners rose to the technical challenge, as they always do, and were ultimately able to find a safe area to place APXS on the top of the rock that is prominent just above and left of the center of today’s image. Combined with a green-light from SRAP, Curiosity now had its (cakey) target and could APXS it too.
Tosol’s APXS and MAHLI target, “Hale Telescope,” is named after the famous landmark located north-northwest of San Diego, California. I, for one, was not familiar with the history of this landmark, including how groundbreaking it was at the time of its development and commissioning through the 1920s, ‘30s, and ‘40s.
Curiosity’s plan tosol started with APXS and MAHLI of Hale Telescope. These activities were complemented by Mastcam images of “Puerto Suelo” and “Potrero Seco,” as well as long-distance imaging by ChemCam of “Torote Bowl,” nearly 1 kilometer (about 0.6 miles) away. Curiosity also imaged and conducted compositional analyses of the layered target “Fan Palm,” slightly offset from Hale Telescope, with LIBS. Our intrepid rover then completed a drive of about 23 meters (about 75 feet) in preparation for the three-sol weekend plan.
On the second sol of the current plan, Curiosity acquired Navcam images and a suprahorizon movie. The highlight of the second sol, however, arguably was an upgraded version of the AEGIS (Autonomous Exploration for Gathering Increased Science) activity where the rover will autonomously determine its own target to analyze with ChemCam while awaiting further instructions from Earth. The software upgrade will allow Curiosity’s team to know what target the rover chose to observe in time for us to make the weekend plan, even though the observation itself won’t happen on Mars until later.
Mars continues to offer stories written in stone, and like all good stories, the richness lies in the voices layered within. Or chocolate. The data aren’t down yet.
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Last Updated Apr 25, 2025 Related Terms
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Preparations for Next Moonwalk Simulations Underway (and Underwater)
NASA’s Curiosity rover appears as a dark speck in this contrast-enhanced view captured on Feb. 28, 2025, by the HiRISE camera aboard NASA’s Mars Reconnaissance Orbiter. Trailing Curiosity are the rover’s tracks, which can linger on the Martian surface for months before being erased by the wind. NASA/JPL-Caltech/University of Arizona The image marks what may be the first time one of the agency’s Mars orbiters has captured the rover driving.
NASA’s Curiosity Mars rover has never been camera shy, having been seen in selfies and images taken from space. But on Feb. 28 — the 4,466th Martian day, or sol, of the mission — Curiosity was captured in what is believed to be the first orbital image of the rover mid-drive across the Red Planet.
Taken by the HiRISE (High-Resolution Imaging Science Experiment) camera aboard NASA’s Mars Reconnaissance Orbiter, the image shows Curiosity as a dark speck at the front of a long trail of rover tracks. Likely to last for months before being erased by wind, the tracks span about 1,050 feet (320 meters). They represent roughly 11 drives starting on Feb. 2 as Curiosity trucked along at a top speed of 0.1 mph (0.16 kph) from Gediz Vallis channel on the journey to its next science stop: a region with potential boxwork formations, possibly made by groundwater billions of years ago.
How quickly the rover reaches the area depends on a number of factors, including how its software navigates the surface and how challenging the terrain is to climb. Engineers at NASA’s Jet Propulsion Laboratory in Southern California, which leads Curiosity’s mission, work with scientists to plan each day’s trek.
“By comparing the time HiRISE took the image to the rover’s commands for the day, we can see it was nearly done with a 69-foot drive,” said Doug Ellison, Curiosity’s planning team chief at JPL.
Designed to ensure the best spatial resolution, HiRISE takes an image with the majority of the scene in black and white and a strip of color down the middle. While the camera has captured Curiosity in color before, this time the rover happened to fall within the black-and-white part of the image.
In the new image, Curiosity’s tracks lead to the base of a steep slope. The rover has since ascended that slope since then, and it is expected to reach its new science location within a month or so.
More About Curiosity and MRO
NASA’s Curiosity Mars rover was built at JPL, which is managed for the agency by Caltech in Pasadena, California. JPL manages both the Curiosity and Mars Reconnaissance Orbiter missions on behalf of NASA’s Science Mission Directorate in Washington as part of the agency’s Mars Exploration Program portfolio. The University of Arizona, in Tucson, operates HiRISE, which was built by BAE Systems in Boulder, Colorado.
For more about the missions, visit:
science.nasa.gov/mission/msl-curiosity
science.nasa.gov/mission/mars-reconnaissance-orbiter
News Media Contacts
Andrew Good
Jet Propulsion Laboratory, Pasadena, Calif.
818-393-2433
andrew.c.good@jpl.nasa.gov
Karen Fox / Molly Wasser
NASA Headquarters, Washington
202-358-1600
karen.c.fox@nasa.gov / molly.l.wasser@nasa.gov
2025-059
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Last Updated Apr 24, 2025 Related Terms
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Sols 4518-4519: Thumbs up from Mars
This image was taken by Front Hazard Avoidance Camera (Front Hazcam) onboard NASA’s Mars rover Curiosity on Sol 4516. NASA/JPL-Caltech Written by Susanne Schwenzer, Planetary Geologist at The Open University
Earth planning date: Monday, 21st April 2025
It is Easter Monday, a bank holiday here in the United Kingdom. I am Science Operations Working Group Chair today, a role that is mainly focused on coordinating all the different planning activities on a given day, and ensuring all the numbers are communicated to everyone. And with that I mean making sure that everyone knows how much power we have and other housekeeping details. It’s a fun role, but on the more technical side of the mission, which means I don’t get to look at the rocks in the workspace as closely as my colleagues who are planning the activities of the instruments directly investigating the rocks. It’s a lot of fun to see how planning day after planning day things come together. But why am I doing this on a bank holiday, when I could well be on my sofa? I just was reminded in the hours before planning how much fun it actually is to spend a little more time looking at all the images – and not the usual hectic rush coming out of an almost complete work day (we start at 8 am PDT, which is 4 pm here in the UK!). So, I enjoyed the views of Mars, and I think Mars gave me a thumbs up for it, or better to say a little pointy ‘rock up’ in the middle of a sandy area, as you can see in the image above!
I am sure you noticed that our team has a lot to celebrate! Less than a month after the publication about alkanes made headlines in many news outlets, we have another big discovery from our rover, now 4518 sols on Mars: in three drill holes, the rover instruments detected the mineral siderite, a carbonate. That allowed a group of scientists from our team to piece together the carbon cycle of Mars. If you want to know more, the full story is here. I am looking forward to our next big discovery. Who knows that that is? Well, it would not be exploration, if we knew!
But today’s workspace looks intriguing with all its little laminae (the very fine layers) and its weathering patterns that look like a layered cake that little fingers have picked the icing off! (Maybe I had too many treats of the season this weekend? That’s for you to decide!) But then Mars did what it did so many times lately: we did not pass our slip risk assessment and therefore had to keep the arm stowed. I think there is a direct link between geologists getting exciting about all the many rocks, and a wheel ending up on one of them, making it unsafe to unstow the arm. There was a collective sigh of disappointment – and then we moved on to what we actually can do.
And that is a lot of imaging. As exciting as getting an APXS measurement and MAHLI images would be, Mastcam images, ChemCam chemistry and RMI images are exciting, too. The plan starts with three Mastcam activities to document the small troughs that form around some of the rocks. Those amount to 15 frames already, then we have a ten-frame mosaic on a target called “West Fork,” which is looking at rocks in the middle ground of the scenery and display interesting layering. Finally, a 84 frame mosaic will image Texoli, one of the large buttes in our neighbourhood, in all its beauty. It shows a series of interesting layers and structures, including some that might be akin to what we expect the boxwork structures to look like. Now, did you keep count? Yes, that’s 109 frames from Mastcam – and add the one for the documentation of the LIBS target, too, and Mastcam takes exactly 110 frames!
ChemCam is busy with a target called “Lake Poway,” which represents the bedrock around us. Also in the ChemCam activities is a long distance RMI upwards Mt Sharp to the Yardang unit. After the drive – more of that later – ChemCam as an automated observation, we call it AEGIS, where ChemCam uses a clever algorithm to pick its own target.
The drive will be very special today. As you may have seen, we are imaging our wheels in regular intervals to make sure that we are keeping track of the wear and tear that over 34 km of offroad driving on Mars have caused. For that, we need a very flat area and our rover drivers did locate one due West of the current rover positions. So, that’s where we will drive first, do the full MAHLI wheel imaging and then return to the originally planned path. That’s where we’ll do a MARDI image, post drive imaging to prepare the planning for the next sols, and the above mentioned AEGIS.
In addition to all the geologic investigations, there is continuous environmental monitoring ongoing. Curiosity will look at opacity and dust devils, and REMS will switch on regularly to measure wind speeds, humidity, temperature, ultraviolet radiation and pressure throughout the plan. Let’s not forget DAN, which monitors water and chlorine in the subsurface as we are driving along. It’s so easy to forget the ones that sit quietly in the back – but in this case, they have important data to contribute!
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Preparations for Next Moonwalk Simulations Underway (and Underwater)
In our modern wireless world, almost all radio frequency (RF) spectrum bands are shared among multiple users. In some domains, similar users technically coordinate to avoid interference. The spectrum management team, part of NASA’s SCaN (Space Communications and Navigation) Program, represents the collaborative efforts across U.S. agencies and the international community to protect and enable NASA’s current and future spectrum-dependent science, exploration, and innovation.
Coordination with Other Spectrum Stakeholders
NASA works to promote the collaborative use of the RF spectrum around Earth, and beyond. For example, NASA coordinates closely with other U.S. government agencies, international civil space agencies, and the private sector to ensure missions that overlap in time, location, and frequency do not cause or receive interference that could jeopardize their success. The spectrum management team protects NASA’s various uses of the spectrum by collaborating with U.S. and international spectrum users on technical matters that inform regulatory discussions.
As a founding member of the Space Frequency Coordination Group, NASA works with members of governmental space- and science-focused agencies from more than 35 countries. The Space Frequency Coordination Group annual meetings provide a forum for multilateral discussion and consideration of international spectrum regulatory issues related to Earth, lunar, and deep space research and exploration. The Space Frequency Coordination Group also provides a forum for the exchange of technical information to facilitate coordination for specific missions and enable efficient use of limited spectrum resources in space.
Domestic and International Spectrum Regulators
Creating and maintaining the global spectrum regulations that govern spectrum sharing requires collaboration and negotiation among all its diverse users. The International Telecommunication Union manages the global spectrum regulatory framework to optimize the increasing, diverse uses of the RF spectrum and reduce the likelihood of RF systems experiencing interference. U.S. regulators at the National Telecommunications and Information Administration and the Federal Communications Commission are responsible for developing and administering domestic spectrum regulations. Organizations across the world cooperatively plan and regulate spectrum use. The spectrum management team participates on behalf of NASA at both national and international levels to ensure that the U.S. domestic and international spectrum regulatory framework supports and enables NASA’s current and future missions.
NASA collaborates with domestic and international spectrum stakeholders to provide technical expertise on space spectrum topics to ensure regulations continue to enable space exploration, science, and innovation.NASA Share
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Last Updated Apr 23, 2025 Related Terms
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