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By NASA
5 min read
Preparations for Next Moonwalk Simulations Underway (and Underwater)
This view of tracks trailing NASA’s Curiosity was captured July 26, 2025, as the rover simultaneously relayed data to a Mars orbiter. Combining tasks like this more efficiently uses energy generated by Curiosity’s nuclear power source, seen here lined with rows of white fins at the back of the rover.NASA/JPL-Caltech This is the same view of Curiosity’s July 25 mosaic, with labels indicating some key parts of the rover involved in recent efficiency improvements, plus a few prominent locations in the distance.NASA/JPL-Caltech New capabilities allow the rover to do science with less energy from its batteries.
Thirteen years since Curiosity landed on Mars, engineers are finding ways to make the NASA rover even more productive. The six-wheeled robot has been given more autonomy and the ability to multitask — improvements designed to make the most of Curiosity’s energy source, a multi-mission radioisotope thermoelectric generator (MMRTG). Increased efficiency means the rover has ample power as it continues to decipher how the ancient Martian climate changed, transforming a world of lakes and rivers into the chilly desert it is today.
Curiosity recently rolled into a region filled with boxwork formations. These hardened ridges are believed to have been created by underground water billions of years ago. Stretching for miles on this part of Mount Sharp, a 3-mile-tall (5-kilometer-tall) mountain, the formations might reveal whether microbial life could have survived in the Martian subsurface eons ago, extending the period of habitability farther into when the planet was drying out.
NASA’s Curiosity viewed this rock shaped like a piece of coral on July 24, 2025, the 4,608th Martian day of the mission. The rover has found many rocks that — like this one — were formed by minerals deposited by ancient water flows combined with billions of years of sandblasting by wind.NASA/JPL-Caltech/MSSS Carrying out this detective work involves a lot of energy. Besides driving and extending a robotic arm to study rocks and cliffsides, Curiosity has a radio, cameras, and 10 science instruments that all need power. So do the multiple heaters that keep electronics, mechanical parts, and instruments operating at their best. Past missions like the Spirit and Opportunity rovers and the InSight lander relied on solar panels to recharge their batteries, but that technology always runs the risk of not receiving enough sunlight to provide power.
Instead, Curiosity and its younger sibling Perseverance each use their MMRTG nuclear power source, which relies on decaying plutonium pellets to create energy and recharge the rover’s batteries. Providing ample power for the rovers’ many science instruments, MMRTGs are known for their longevity (the twin Voyager spacecraft have relied on RTGs since 1977). But as the plutonium decays over time, it takes longer to recharge Curiosity’s batteries, leaving less energy for science each day.
The team carefully manages the rover’s daily power budget, factoring in every device that draws on the batteries. While these components were all tested extensively before launch, they are part of complex systems that reveal their quirks only after years in the extreme Martian environment. Dust, radiation, and sharp temperature swings bring out edge cases that engineers couldn’t have expected.
“We were more like cautious parents earlier in the mission,” said Reidar Larsen of NASA’s Jet Propulsion Laboratory in Southern California, which built and operates the rover. Larsen led a group of engineers who developed the new capabilities. “It’s as if our teenage rover is maturing, and we’re trusting it to take on more responsibility. As a kid, you might do one thing at a time, but as you become an adult, you learn to multitask.”
More Efficient Science
Generally, JPL engineers send Curiosity a list of tasks to complete one by one before the rover ends its day with a nap to recharge. In 2021, the team began studying whether two or three rover tasks could be safely combined, reducing the amount of time Curiosity is active.
For example, Curiosity’s radio regularly sends data and images to a passing orbiter, which relays them to Earth. Could the rover talk to an orbiter while driving, moving its robotic arm, or snapping images? Consolidating tasks could shorten each day’s plan, requiring less time with heaters on and instruments in a ready-to-use state, reducing the energy used. Testing showed Curiosity safely could, and all of these have now been successfully demonstrated on Mars.
Another trick involves letting Curiosity decide to nap if it finishes its tasks early. Engineers always pad their estimates for how long a day’s activity will take just in case hiccups arise. Now, if Curiosity completes those activities ahead of the time allotted, it will go to sleep early.
By letting the rover manage when it naps, there is less recharging to do before the next day’s plan. Even actions that trim just 10 or 20 minutes from a single activity add up over the long haul, maximizing the life of the MMRTG for more science and exploration down the road.
Miles to Go
In fact, the team has been implementing other new capabilities on Curiosity for years. Several mechanical issues required a rework of how the robotic arm’s rock-pulverizing drill collects samples, and driving capabilities have been enhanced with software updates. When a color filter wheel stopped turning on one of the two cameras mounted on Mastcam, Curiosity’s swiveling “head,” the team developed a workaround allowing them to capture the same beautiful panoramas.
JPL also developed an algorithm to reduce wear on Curiosity’s rock-battered wheels. And while engineers closely monitor any new damage, they aren’t worried: After 22 miles (35 kilometers) and extensive research, it’s clear that, despite some punctures, the wheels have years’ worth of travel in them. (And in a worst-case scenario, Curiosity could remove the damaged part of the wheel’s “tread” and still drive on the remaining part.)
Together, these measures are doing their job to keep Curiosity as busy as ever.
More About Curiosity
Curiosity was built by NASA’s Jet Propulsion Laboratory, which is managed by Caltech in Pasadena, California. JPL leads the mission on behalf of NASA’s Science Mission Directorate in Washington as part of NASA’s Mars Exploration Program portfolio. Malin Space Science Systems in San Diego built and operates Mastcam.
For more about Curiosity, visit:
science.nasa.gov/mission/msl-curiosity
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
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Last Updated Aug 04, 2025 Related Terms
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By NASA
Explore This Section Science For Educators NUBE: New Card Game Helps… Overview Learning Resources Science Activation Teams SME Map Opportunities More Science Activation Stories Citizen Science 4 min read
NUBE: New Card Game Helps Learners Identify Cloud Types Through Play
Different clouds types can have different effects on our weather and climate, which makes identifying cloud types important – but learning to identify cloud types can be tricky! Educational games make the learning process easier and more enjoyable for learners of all ages and create an opportunity for families and friends to spend quality time together.
The NASA Science Activation Program’s NASA Earth Science Education Collaborative (NESEC) and the Queens Public Library co-developed a new Global Learning & Observations to Benefit the Environment (GLOBE) card game called NUBE (pronounced noo-beh) – the Spanish word for cloud. During this fun, interactive game, players match cards by cloud type or sky color – with 11 cloud types and 5 shades of blue (in real life, sky color can be an indication of how many aerosols are in the atmosphere). There are also special cards in the deck, such as Rainmakers, which change the order of play; Obscurations, which require the next player to draw two cards; and Mystery cards, which require players to give hints while other players guess the cloud type. By playing the game, participants practice learning the names of clouds while they begin to appreciate the differences in cloud type and sky color.
NESEC is collaborating with another NASA Science Activation project team – NASA@ My Library (NAML, led by the Space Science Institute, SSI – to get the game into library programs. NAML recruited and is distributing sets of two or four card decks to 292 U.S. libraries. Participating libraries are located in 45 states, with a large number (>50%) serving rural communities. SSI also promoted the opportunity to its network of libraries and co-presented a webinar with NESEC for interested libraries. Library applications described how they plan to use the game with their patrons, including programs for audiences ranging from kids to seniors related to weather and safety programs, citizen science clubs, home school groups, summer reading, game nights, circulating kits and more. Libraries that receive NUBE commit to use the game in at least one program and complete a short evaluation survey.
NUBE evolved through several iterations as staff from several Queens Public Library branches tested the game with different age groups, from young kids to teens and adults. The game was also tested at the Challenger Center and the Center for Science, Technology, Education, & Mathematics (STEM) Teaching and Learning at Northern Arizona University. Alex Hernandez Bonifacio, an early Learning Educator at Queens Public Library reported, “It was amazing to see what kids reflected on as they were playing NUBE. For example, there was this third grader who was surprised to realize something could obscure our view of the clouds. She used to think clouds were too high in the sky for anything to block our view of them. While playing NUBE, she became very intrigued about the obscuration cards, and she realized that things closer to the ground like heavy snow could in fact block our view of the clouds!” After incorporating feedback from testers and counting the votes for different graphic design options, NUBE is now ready to be downloaded and enjoyed by all!
If you’re excited to play this awesome GLOBE Clouds card game and want to learn even more about clouds, you can download the GLOBE Observer app on your smartphone to participate in hands-on NASA scientific research – sharing observations of your environment as a citizen scientist (no citizenship required)! Learn more and discover additional resources for engaging in clouds activities with the GLOBE Observer Clouds Toolkit.
NESEC, led by the Institute for Global Environmental Strategies (IGES) and supported by NASA under cooperative agreement award number NNX16AE28A, is part of NASA’s Science Activation Portfolio. Learn more about how Science Activation connects NASA science experts, real content, and experiences with community leaders to do science in ways that activate minds and promote deeper understanding of our world and beyond: https://science.nasa.gov/learn
NUBE, a GLOBE Clouds card game Share
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Last Updated Aug 01, 2025 Editor NASA Science Editorial Team Related Terms
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By NASA
This artist’s concept of Blue Ghost Mission 4 shows Firefly’s Blue Ghost lunar lander and NASA payloads in the lunar South Pole Region, through NASA’s CLPS (Commercial Lunar Payload Services) initiative.Credit: Firefly Aerospace NASA has awarded Firefly Aerospace of Cedar Park, Texas, $176.7 million to deliver two rovers and three scientific instruments to the lunar surface as part of the agency’s CLPS (Commercial Lunar Payload Services) initiative and Artemis campaign to explore more of the Moon than ever before.
This delivery is the first time NASA will use multiple rovers and a variety of stationary instruments, in a collaborative effort with the CSA (Canadian Space Agency) and the University of Bern, to help us understand the chemical composition of the lunar South Pole region and discover the potential for using resources available in permanently shadowed regions of the Moon.
“Through CLPS, NASA is embracing a new era of lunar exploration, with commercial companies leading the way,” said Joel Kearns, deputy associate administrator for exploration, Science Mission Directorate, NASA Headquarters in Washington. “These investigations will produce critical knowledge required for long-term sustainability and contribute to a deeper understanding of the lunar surface, allowing us to meet our scientific and exploration goals for the South Pole region of the Moon for the benefit of all.”
Under the new CLPS task order, Firefly is tasked with delivering end-to-end payload services to the lunar surface, with a period of performance from Tuesday to March 29, 2030. The company’s lunar lander is targeted to land at the Moon’s South Pole region in 2029.
This is Firefly’s fifth task order award and fourth lunar mission through CLPS. Firefly’s first delivery successfully landed on the Moon’s near side in March 2025 with 10 NASA payloads. The company’s second mission, targeting a launch in 2026, includes a lunar orbit drop-off of a satellite combined with a delivery to the lunar surface on the far side. Firefly’s third lunar mission will target landing in the Gruithuisen Domes on the near side of the Moon in 2028, delivering six experiments to study that enigmatic lunar volcanic terrain.
“As NASA sends both humans and robots to further explore the Moon, CLPS deliveries to the lunar South Pole region will provide a better understanding of the exploration environment, accelerating progress toward establishing a long-term human presence on the Moon, as well as eventual human missions to Mars,” said Adam Schlesinger, manager of the CLPS initiative at NASA’s Johnson Space Center in Houston.
The rovers and instruments that are part of this newly awarded flight include:
MoonRanger is an autonomous microrover that will explore the lunar surface. MoonRanger will collect images and telemetry data while demonstrating autonomous capabilities for lunar polar exploration. Its onboard Neutron Spectrometer System instrument will study hydrogen-bearing volatiles and the composition of lunar regolith, or soil.
Lead development organizations: NASA’s Ames Research Center in California’s Silicon Valley, and Carnegie Mellon University and Astrobotic, both in Pittsburgh. Stereo Cameras for Lunar Plume Surface Studies will use enhanced stereo imaging photogrammetry, active illumination, and ejecta impact detection sensors to capture the impact of the rocket exhaust plume on lunar regolith as the lander descends on the Moon’s surface. The high-resolution stereo images will help predict lunar regolith erosion and ejecta characteristics, as bigger, heavier spacecraft and hardware are delivered to the Moon near each other in the future.
Lead development organization: NASA’s Langley Research Center in Hampton, Virginia. Laser Retroreflector Array is an array of eight retroreflectors on an aluminum support structure that enables precision laser ranging, a measurement of the distance between the orbiting or landing spacecraft to the reflector on the lander. The array is a passive optical instrument, which functions without power, and will serve as a permanent location marker on the Moon for decades to come.
Lead development organization: NASA’s Goddard Space Flight Center in Greenbelt, Maryland. A CSA Rover is designed to access and explore remote South Pole areas of interest, including permanently shadowed regions, and to survive at least one lunar night. The CSA rover has stereo cameras, a neutron spectrometer, two imagers (visible to near-infrared), a radiation micro-dosimeter, and a NASA-contributed thermal imaging radiometer developed by the Applied Physics Laboratory. These instruments will advance our understanding of the physical and chemical properties of the lunar surface, the geological history of the Moon, and potential resources such as water ice. It will also improve our understanding of the environmental challenges that await future astronauts and their life support systems.
Lead development organization: CSA. Laser Ionization Mass Spectrometer is a mass spectrometer that will analyze the element and isotope composition of lunar regolith. The instrument will utilize a Firefly-built robotic arm and Titanium shovel that will deploy to the lunar surface and support regolith excavation. The system will then funnel the sample into its collection unit and use a pulsed laser beam to identify differences in chemistry compared to samples studied in the past, like those collected during the Apollo program. Grain-by-grain analyses will provide a better understanding of the chemical complexity of the landing site and the surrounding area, offering insights into the evolution of the Moon.
Lead development organization: University of Bern in Switzerland. Through the CLPS initiative, NASA purchases lunar landing and surface operations services from American companies. The agency uses CLPS to send scientific instruments and technology demonstrations to advance capabilities for science, exploration, or commercial development of the Moon, and to support human exploration beyond to Mars. By supporting a robust cadence of lunar deliveries, NASA will continue to enable a growing lunar economy while leveraging the entrepreneurial innovation of the commercial space industry.
To learn more about CLPS and Artemis, visit:
https://www.nasa.gov/clps
-end-
Alise Fisher
Headquarters, Washington
202-358-2546
alise.m.fisher@nasa.gov
Nilufar Ramji
Johnson Space Center, Houston
281-483-5111
nilufar.ramji@nasa.gov
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Last Updated Jul 29, 2025 LocationNASA Headquarters Related Terms
Commercial Lunar Payload Services (CLPS) Artemis Earth's Moon View the full article
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By Space Force
Space Systems Command has activated two new System Deltas within the mission area of the Space Force Program Executive Officer for Space Sensing.
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By NASA
4 min read
NASA, JAXA XRISM Satellite X-rays Milky Way’s Sulfur
An international team of scientists have provided an unprecedented tally of elemental sulfur spread between the stars using data from the Japan-led XRISM (X-ray Imaging and Spectroscopy Mission) spacecraft.
Astronomers used X-rays from two binary star systems to detect sulfur in the interstellar medium, the gas and dust found in the space between stars. It’s the first direct measurement of both sulfur’s gas and solid phases, a unique capability of X-ray spectroscopy, XRISM’s (pronounced “crism”) primary method of studying the cosmos.
“Sulfur is important for how cells function in our bodies here on Earth, but we still have a lot of questions about where it’s found out in the universe,” said Lía Corrales, an assistant professor of astronomy at the University of Michigan in Ann Arbor. “Sulfur can easily change from a gas to a solid and back again. The XRISM spacecraft provides the resolution and sensitivity we need to find it in both forms and learn more about where it might be hiding.”
A paper about these results, led by Corrales, published June 27 in the Publications of the Astronomical Society of Japan.
Watch to learn how the XRISM (X-ray Imaging and Spectroscopy Mission) satellite took an unprecidented look at our galaxy’s sulfur. XRISM is led by JAXA (Japan Aerospace Exploration Agency) in collaboration with NASA, along with contributions from ESA (European Space Agency).
NASA’s Goddard Space Flight Center Using ultraviolet light, researchers have found gaseous sulfur in the space between stars. In denser parts of the interstellar medium, such as the molecular clouds where stars and planets are born, this form of sulfur quickly disappears.
Scientists assume the sulfur condenses into a solid, either by combining with ice or mixing with other elements.
When a doctor performs an X-ray here on Earth, they place the patient between an X-ray source and a detector. Bone and tissue absorb different amounts of the light as it travels through the patient’s body, creating contrast in the detector.
To study sulfur, Corrales and her team did something similar.
They picked a portion of the interstellar medium with the right density — not so thin that all the X-rays would pass through unchanged, but also not so dense that they would all be absorbed.
Then the team selected a bright X-ray source behind that section of the medium, a binary star system called GX 340+0 located over 35,000 light-years away in the southern constellation Scorpius.
This composite shows a section of the interstellar medium scientists X-rayed for sulfur using the Japan-led XRISM (X-ray Imaging and Spectroscopy Mission). X-ray binary GX 340+0 is the blue dot in the center. The composite contains a blend of imagery in X-rays (represented in deep blue), infrared, and optical light.DSS/DECaPS/eRosita/NASA’s Goddard Space Flight Center This composite shows a section of the interstellar medium scientists X-rayed for sulfur using the Japan-led XRISM (X-ray Imaging and Spectroscopy Mission). The X-ray binary 4U 1630–472 is highlighted at the center. The composite contains a blend of imagery in X-rays (represented in deep blue), infrared, and optical light.DSS/DECaPS/eRosita/NASA’s Goddard Space Flight Center Using the Resolve instrument on XRISM, the scientists were able to measure the energy of GX 340+0’s X-rays and determined that sulfur was present not only as a gas, but also as a solid, possibly mixed with iron.
“Chemistry in environments like the interstellar medium is very different from anything we can do on Earth, but we modeled sulfur combined with iron, and it seems to match what we’re seeing with XRISM,” said co-author Elisa Costantini, a senior astronomer at the Space Research Organization Netherlands and the University of Amsterdam. “Our lab has created models for different elements to compare with astronomical data for years. The campaign is ongoing, and soon we’ll have new sulfur measurements to compare with the XRISM data to learn even more.”
Iron-sulfur compounds are often found in meteorites, so scientists have long thought they might be one way sulfur solidifies out of molecular clouds to travel through the universe.
In their paper, Corrales and her team propose a few compounds that would match XRISM’s observations — pyrrhotite, troilite, and pyrite, which is sometimes called fool’s gold.
The researchers were also able to use measurements from a second X-ray binary called 4U 1630-472 that helped confirm their findings.
“NASA’s Chandra X-ray Observatory has previously studied sulfur, but XRISM’s measurements are the most detailed yet,” said Brian Williams, the XRISM project scientist at NASA’s Goddard Space Flight Center in Greenbelt, Maryland. “Since GX 340+0 is on the other side of the galaxy from us, XRISM’s X-ray observations are a unique probe of sulfur in a large section of the Milky Way. There’s still so much to learn about the galaxy we call home.”
XRISM is led by JAXA (Japan Aerospace Exploration Agency) in collaboration with NASA, along with contributions from ESA (European Space Agency). NASA and JAXA developed Resolve, the mission’s microcalorimeter spectrometer.
Download images and videos through NASA’s Scientific Visualization Studio. By Jeanette Kazmierczak
NASA’s Goddard Space Flight Center, Greenbelt, Md.
Media Contact:
Alise Fisher
202-358-2546
alise.m.fisher@nasa.gov
NASA Headquarters, Washington
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Last Updated Jul 23, 2025 EditorJeanette Kazmierczak Related Terms
Goddard Space Flight Center Astrophysics Stars The Universe X-ray Astronomy X-ray Binaries XRISM (X-Ray Imaging and Spectroscopy Mission) View the full article
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