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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 3 min read
Sols 4461-4463: Salty Salton Sea?
NASA’s Mars rover Curiosity acquired this image showing its Alpha Particle X-Ray Spectrometer (APXS), a spectrometer that measures the abundance of chemical elements in rocks and soils, on the “Chumash Trail” target in its workspace. Note the butte in the background. The rover used its Front Hazard Avoidance Camera (Front Hazcam) to capture the image on Feb. 19, 2025 — sol 4458, or Martian day 4,458 of the Mars Science Laboratory mission — at 21:03:48 UTC. NASA/JPL-Caltech Earth planning date: Friday, Feb. 21, 2025
Since first encountering the sulfate-bearing unit around Sol 3540, we have detected minerals and elemental concentrations consistent with the presence of various salts and a general drying out of Mars climate (read ”NASA’s Curiosity Mars Rover Reaches Long-Awaited Salty Region”). Salton Sea in California is a saline lake, meaning it has high concentrations of salty minerals formed as a result of evaporation processes dominating over input of fresh water. As such, we thought it would be a fitting name for one of our rock targets to be analyzed by the APXS and MAHLI instruments in this weekend plan. We have observed a variety of different textures and colors associated with the sulfate-bearing unit. The target “Salton Sea” is an example of one such texture — a dark-toned, relatively smooth, platy layer. Will the chemistry indicate the presence of salty minerals, some of which may be the same as those found at Salton Sea? Other rock targets to be analyzed in this busy weekend plan include “Wellman Divide,” another APXS and MAHLI target on a thicker, dark-toned, rougher textured layer, and “Goodykoontz” and “Paseo del Mar,” both ChemCam LIBS targets, on a nodule and a dark, platy layer, respectively.
We also continue to document the layers of rock exposed within several buttes and mesas around us (“Dragon Tooth” and “Texoli” buttes, and “Gould Mesa”) with CCAM RMI and Mastcam imaging. Curiosity will hopefully climb though equivalent layers as we continue our ascent of Mount Sharp, so these images can help with interpretation when we finally encounter them on the ground. Mastcam will also image a trough in the sand surrounding one of the bedrock blocks — a feature that has been observed relatively frequently lately.
The atmospheric scientists also have an action-packed plan with coordinated APXS atmospheric and ChemCam passive-sky observations to measure argon and oxygen, respectively, as well as standard activities. These observations help to track changes in seasonal atmospheric flow from equatorial to polar regions on Mars. Standard atmospheric monitoring activities included in the plan are: Navcam dust devil movies (x2), suprahorizon movies (x2), a zenith movie, line of sight observations (x2), and a cloud altitude observation, as well as Mastcam tau observations (x2).
After a planned drive of about 49 meters (about 161 feet) on the second sol of this three-sol weekend plan, the MARDI camera will take an image of the terrain beneath the rover. The plan is rounded out with standard REMS, DAN and RAD activities.
Written by Lucy Thompson, Planetary Geologist at University of New Brunswick
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Last Updated Feb 25, 2025 Related Terms
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By NASA
6 Min Read NASA’s PUNCH Mission to Revolutionize Our View of Solar Wind
Earth is immersed in material streaming from the Sun. This stream, called the solar wind, is washing over our planet, causing breathtaking auroras, impacting satellites and astronauts in space, and even affecting ground-based infrastructure.
NASA’s PUNCH (Polarimeter to Unify the Corona and Heliosphere) mission will be the first to image the Sun’s corona, or outer atmosphere, and solar wind together to better understand the Sun, solar wind, and Earth as a single connected system.
Launching no earlier than Feb. 28, 2025, aboard a SpaceX Falcon 9 rocket from Vandenberg Space Force Base in California, PUNCH will provide scientists with new information about how potentially disruptive solar events form and evolve. This could lead to more accurate predictions about the arrival of space weather events at Earth and impact on humanity’s robotic explorers in space.
“What we hope PUNCH will bring to humanity is the ability to really see, for the first time, where we live inside the solar wind itself,” said Craig DeForest, principal investigator for PUNCH at Southwest Research Institute’s Solar System Science and Exploration Division in Boulder, Colorado.
This video can be freely shared and downloaded at https://svs.gsfc.nasa.gov/14773.
Video credit: NASA’s Goddard Space Flight Center Seeing Solar Wind in 3D
The PUNCH mission’s four suitcase-sized satellites have overlapping fields of view that combine to cover a larger swath of sky than any previous mission focused on the corona and solar wind. The satellites will spread out in low Earth orbit to construct a global view of the solar corona and its transition to the solar wind. They will also track solar storms like coronal mass ejections (CMEs). Their Sun-synchronous orbit will enable them to see the Sun 24/7, with their view only occasionally blocked by Earth.
Typical camera images are two dimensional, compressing the 3D subject into a flat plane and losing information. But PUNCH takes advantage of a property of light called polarization to reconstruct its images in 3D. As the Sun’s light bounces off material in the corona and solar wind, it becomes polarized — meaning the light waves oscillate in a particular way that can be filtered, much like how polarized sunglasses filter out glare off of water or metal. Each PUNCH spacecraft is equipped with a polarimeter that uses three distinct polarizing filters to capture information about the direction that material is moving that would be lost in typical images.
“This new perspective will allow scientists to discern the exact trajectory and speed of coronal mass ejections as they move through the inner solar system,” said DeForest. “This improves on current instruments in two ways: with three-dimensional imaging that lets us locate and track CMEs which are coming directly toward us; and with a broad field of view, which lets us track those CMEs all the way from the Sun to Earth.”
All four spacecraft are synchronized to serve as a single “virtual instrument” that spans the whole PUNCH constellation.
Crews conduct additional solar array deployment testing for NASA’s PUNCH (Polarimeter to Unify the Corona and Heliosphere) satellites at Astrotech Space Operations located on Vandenberg Space Force Base in California on Wednesday, Jan. 22, 2025. USSF 30th Space Wing/Alex Valdez The PUNCH satellites include one Narrow Field Imager and three Wide Field Imagers. The Narrow Field Imager (NFI) is a coronagraph, which blocks out the bright light from the Sun to better see details in the Sun’s corona, recreating what viewers on Earth see during a total solar eclipse when the Moon blocks the face of the Sun — a narrower view that sees the solar wind closer to the Sun. The Wide Field Imagers (WFI) are heliospheric imagers that view the very faint, outermost portion of the solar corona and the solar wind itself — giving a wide view of the solar wind as it spreads out into the solar system.
“I’m most excited to see the ‘inbetweeny’ activity in the solar wind,” said Nicholeen Viall, PUNCH mission scientist at NASA’s Goddard Space Flight Center in Greenbelt, Maryland. “This means not just the biggest structures, like CMEs, or the smallest interactions, but all the different types of solar wind structures that fill that in between area.”
When these solar wind structures from the Sun reach Earth’s magnetic field, they can drive dynamics that affect Earth’s radiation belts. To launch spacecraft through these belts, including ones that will carry astronauts to the Moon and beyond, scientists need to understand the solar wind structure and changes in this region.
Building Off Other Missions
“The PUNCH mission is built on the shoulders of giants,” said Madhulika Guhathakurta, PUNCH program scientist at NASA Headquarters in Washington. “For decades, heliophysics missions have provided us with glimpses of the Sun’s corona and the solar wind, each offering critical yet partial views of our dynamic star’s influence on the solar system.”
When scientists combine data from PUNCH and NASA’s Parker Solar Probe, which flies through the Sun’s corona, they will see both the big picture and the up-close details. Working together, Parker Solar Probe and PUNCH span a field of view from a little more than half a mile (1 kilometer) to over 160 million miles (about 260 million kilometers).
Additionally, the PUNCH team will combine their data with diverse observations from other missions, like NASA’s CODEX (Coronal Diagnostic Experiment) technology demonstration, which views the corona even closer to the surface of the Sun from its vantage point on the International Space Station. PUNCH’s data also complements observations from NASA’s EZIE (Electrojet Zeeman Imaging Explorer) — targeted for launch in March 2025 — which investigates the magnetic field perturbations associated with Earth’s high-altitude auroras that PUNCH will also spot in its wide-field view.
A conceptual animation showing the heliosphere, the vast bubble that is generated by the Sun’s magnetic field and envelops all the planets.
NASA’s Goddard Space Flight Center Conceptual Image Lab As the solar wind that PUNCH will observe travels away from the Sun and Earth, it will then be studied by the IMAP (Interstellar Mapping and Acceleration Probe) mission, which is targeting a launch in 2025.
“The PUNCH mission will bridge these perspectives, providing an unprecedented continuous view that connects the birthplace of the solar wind in the corona to its evolution across interplanetary space,” said Guhathakurta.
The PUNCH mission is scheduled to conduct science for at least two years, following a 90-day commissioning period after launch. The mission is launching as a rideshare with the agency’s next astrophysics observatory, SPHEREx (Spectro-Photometer for the History of the Universe, Epoch of Reionization and Ices Explorer).
“PUNCH is the latest heliophysics addition to the NASA fleet that delivers groundbreaking science every second of every day,” said Joe Westlake, heliophysics division director at NASA Headquarters in Washington. “Launching this mission as a rideshare bolsters its value to the nation by optimizing every pound of launch capacity to maximize the scientific return for the cost of a single launch.”
The PUNCH mission is led by Southwest Research Institute’s offices in San Antonio, Texas, and Boulder, Colorado. The mission is managed by the Explorers Program Office at NASA Goddard for NASA’s Science Mission Directorate in Washington.
By Abbey Interrante
NASA’s Goddard Space Flight Center, Greenbelt, Md.
Header Image:
An artist’s concept showing the four PUNCH satellites orbiting Earth.
Credits: NASA’s Goddard Space Flight Center Conceptual Image Lab
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Last Updated Feb 21, 2025 Related Terms
Heliophysics Coronal Mass Ejections Goddard Space Flight Center Heliophysics Division Polarimeter to Unify the Corona and Heliosphere (PUNCH) Science Mission Directorate Solar Wind Space Weather The Sun Explore More
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By European Space Agency
The second of the Meteosat Third Generation (MTG) satellites and the first instrument for the Copernicus Sentinel-4 mission are fully integrated and, having completed their functional and environmental tests, they are now ready to embark on their journey to the US for launch this summer.
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By European Space Agency
Ice melting from glaciers around the world is depleting regional freshwater resources and driving global sea levels to rise at ever-faster rates.
According to new findings, through an international effort involving 35 research teams, glaciers have been losing an average of 273 billion tonnes of ice per year since the year 2000 – but hidden within this average there has been an alarming increase over the last 10 years.
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By NASA
Official crew portrait for NASA’s SpaceX Crew-10 mission with NASA astronauts Anne McClain and Nichole Ayers, JAXA (Japan Aerospace Exploration Agency) astronaut Takuya Onishi, and Roscosmos cosmonaut Kirill Peskov.Credit: NASA NASA and its partners will discuss the upcoming Expedition 73 mission aboard the International Space Station during a pair of news conferences on Monday, Feb. 24, from the agency’s Johnson Space Center in Houston.
Mission leadership will participate in an overview news conference at 2 p.m. EST live on NASA+, covering preparations for NASA’s SpaceX Crew-10 launch in March and the agency’s crew member rotation launch on Soyuz in April. Learn how to watch NASA content through a variety of platforms, including social media.
NASA also will host a crew news conference at 4 p.m. and provide coverage on NASA+, followed by individual crew member interviews beginning at 5 p.m. This is the final media opportunity with Crew-10 before the crew members travel to NASA’s Kennedy Space Center in Florida for launch.
The Crew-10 mission, targeted to launch Wednesday, March 12, will carry NASA astronauts Anne McClain and Nichole Ayers, JAXA (Japan Aerospace Exploration Agency) astronaut Takuya Onishi, and Roscosmos cosmonaut Kirill Peskov to the orbiting laboratory.
NASA astronaut Jonny Kim, scheduled to launch to the space station on the Soyuz MS-27 spacecraft no earlier than April 8, also will participate in the crew briefing and interviews. Kim will be available again on Tuesday, March 18, for limited virtual interviews prior to launch. NASA will provide additional details on that opportunity when available.
For the Crew-10 mission, a SpaceX Falcon 9 rocket and Dragon spacecraft will launch from Launch Complex 39A at NASA Kennedy. The three-person crew of Soyuz MS-27, including Kim and Roscosmos cosmonauts Sergey Ryzhikov and Alexey Zubritsky, will launch from the Baikonur Cosmodrome in Kazakhstan.
United States-based media seeking to attend in person must contact the NASA Johnson newsroom no later than 5 p.m. on Friday, Feb. 21, at 281-483-5111 or at jsccommu@mail.nasa.gov. U.S. and international media interested in participating by phone must contact NASA Johnson by 9:45 a.m. the day of the event.
U.S. and international media seeking remote interviews with the crew must submit requests to the NASA Johnson newsroom by 5 p.m. on Feb. 21. A copy of NASA’s media accreditation policy is available online.
Briefing participants include (all times Eastern and subject to change based on real-time operations):
2 p.m.: Expedition 73 Overview News Conference
Ken Bowersox, associate administrator, Space Operations Mission Directorate at NASA Headquarters in Washington Steve Stich, manager, NASA’s Commercial Crew Program, NASA Kennedy Bill Spetch, operations integration manager, NASA’s International Space Station Program, NASA Johnson William Gerstenmaier, vice president, Build & Flight Reliability, SpaceX Mayumi Matsuura, vice president and director general, Human Spaceflight Technology Directorate, JAXA 4 p.m.: Expedition 73 Crew News Conference
Jonny Kim, Soyuz MS-27 flight engineer, NASA Anne McClain, Crew-10 spacecraft commander, NASA Nichole Ayers, Crew-10 pilot, NASA Takuya Onishi, Crew-10 mission specialist, JAXA Kirill Peskov, Crew-10 mission specialist, Roscosmos 5 p.m.: Crew Individual Interview Opportunities
Crew-10 members and Kim available for a limited number of interviews Official portrait of NASA astronaut Jonny Kim, who will serve as a flight engineer during Expedition 73.Credit: NASA Kim is making his first spaceflight after selection as part of the 2017 NASA astronaut class. A native of Los Angeles, Kim is a U.S. Navy lieutenant commander and dual designated naval aviator and flight surgeon. Kim also served as an enlisted Navy SEAL. He holds a bachelor’s degree in Mathematics from the University of San Diego and a medical degree from Harvard Medical School in Boston. He completed his internship with the Harvard Affiliated Emergency Medicine Residency at Massachusetts General Hospital and Brigham and Women’s Hospital. After completing the initial astronaut candidate training, Kim supported mission and crew operations in various roles, including the Expedition 65 lead operations officer, T-38 operations liaison, and space station capcom chief engineer. Follow @jonnykimusa on X and @jonnykimusa on Instagram.
Selected by NASA as an astronaut in 2013, this will be McClain’s second spaceflight. A colonel in the U.S. Army, she earned her bachelor’s degree in Mechanical Engineering from the U.S. Military Academy at West Point, New York, and holds master’s degrees in Aerospace Engineering, International Security, and Strategic Studies. The Spokane, Washington, native was an instructor pilot in the OH-58D Kiowa Warrior helicopter and is a graduate of the U.S. Naval Test Pilot School in Patuxent River, Maryland. McClain has more than 2,300 flight hours in 24 rotary and fixed-wing aircraft, including more than 800 in combat, and was a member of the U.S. Women’s National Rugby Team. On her first spaceflight, McClain spent 204 days as a flight engineer during Expeditions 58 and 59, and completed two spacewalks, totaling 13 hours and 8 minutes. Since then, she has served in various roles, including branch chief and space station assistant to the chief of NASA’s Astronaut Office. Follow @astroannimal on X and @astro_annimal on Instagram.
The Crew-10 mission will be the first spaceflight for Ayers, who was selected as a NASA astronaut in 2021. Ayers is a major in the U.S. Air Force and the first member of NASA’s 2021 astronaut class named to a crew. The Colorado native graduated from the Air Force Academy in Colorado Springs with a bachelor’s degree in Mathematics and a minor in Russian, where she was a member of the academy’s varsity volleyball team. She later earned a master’s in Computational and Applied Mathematics from Rice University in Houston. Ayers served as an instructor pilot and mission commander in the T-38 ADAIR and F-22 Raptor, leading multinational and multiservice missions worldwide. She has more than 1,400 total flight hours, including more than 200 in combat. Follow @astro_ayers on X and @astro_ayers on Instagram.
With 113 days in space, this mission also will mark Onishi’s second trip to the space station. After being selected as an astronaut by JAXA in 2009, he flew as a flight engineer for Expeditions 48 and 49, becoming the first Japanese astronaut to robotically capture the Cygnus spacecraft. He also constructed a new experimental environment aboard Kibo, the station’s Japanese experiment module. After his first spaceflight, Onishi became certified as a JAXA flight director, leading the team responsible for operating Kibo from JAXA Mission Control in Tsukuba, Japan. He holds a bachelor’s degree in Aeronautics and Astronautics from the University of Tokyo, and was a pilot for All Nippon Airways, flying more than 3,700 flight hours in the Boeing 767. Follow astro_onishi on X.
The Crew-10 mission will also be Peskov’s first spaceflight. Before his selection as a cosmonaut in 2018, he earned a degree in Engineering from the Ulyanovsk Civil Aviation School and was a co-pilot on the Boeing 757 and 767 aircraft for airlines Nordwind and Ikar. Assigned as a test cosmonaut in 2020, he has additional experience in skydiving, zero-gravity training, scuba diving, and wilderness survival.
Learn more about how NASA innovates for the benefit of humanity through NASA’s Commercial Crew Program at:
https://www.nasa.gov/commercialcrew
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Joshua Finch / Jimi Russell
Headquarters, Washington
202-358-1100
joshua.a.finch@nasa.gov / james.j.russell@nasa.gov
Kenna Pell / Sandra Jones
Johnson Space Center, Houston
281-483-5111
kenna.m.pell@nasa.gov / sandra.p.jones@nasa.gov
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Last Updated Feb 18, 2025 LocationNASA Headquarters Related Terms
Humans in Space Anne C. McClain Astronauts Commercial Crew International Space Station (ISS) ISS Research Johnson Space Center Jonny Kim Nichole Ayers View the full article
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