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Crews at NASA’s Michoud Assembly Facility in New Orleans transport the 130-foot-tall Artemis IV liquid hydrogen tank out of a production cell inside the main factory building into a detached test building on a separate portion of the 829-acre site on May 15, 2026. The liquid hydrogen tank will form part of the core stage for the SLS (Space Launch System) rocket, providing thousands of gallons of super-cold propellant to one of four RS-25 engines.

Image credit: NASA/Michael DeMocker

NASA MAVEN (Mars Atmosphere and Volatile Evolution) mission scientists have uncovered a key puzzle piece in understanding certain types of auroras on Mars, finding that they form in a similar way to Earth-based auroras.
 
Results published Thursday in Nature Communications show the same mechanism that circulates and catapults charged particles into Earth’s atmosphere is happening at Mars on much smaller scales because of differences in the two planets’ magnetic fields.
 
The MAVEN spacecraft, in orbit around Mars, experienced a loss of signal with ground stations on Earth on Dec. 6, 2025. On June 3, NASA declared the mission had concluded after finding the spacecraft to be unrecoverable. However, data from the mission is still being used to inform NASA science and future missions to Mars.
 
When the Sun’s magnetic field lines get close to Earth’s magnetosphere, the large magnetic bubble protecting the planet, they can reconnect and inject energy and mass throughout Earth’s magnetosphere and magnetotail, ultimately firing electrons back into the atmosphere to generate Earth’s auroras. This process, called the Dungey cycle, drives electrical currents, accelerates charged particles that create auroras, and controls the circulation of plasma in Earth’s magnetosphere and ionosphere.
 
This new study shows that a miniature version of the Dungey cycle is happening over Mars’ strong crustal magnetic fields, which gives scientists a better look into the physics of Martian auroras.
 
“We knew that magnetic reconnection was happening at Mars but did not expect it to be like the Dungey cycle,” said Shaosui Xu, lead author of the study and associate research physicist at the Space Sciences Laboratory at the University of California, Berkeley.
 
Mars does not have a global magnetic field like Earth. Earth’s magnetic field is created by our planet’s churning core, while Mars has numerous miniature magnetospheres that arise from intensely magnetized crust scattered around the planet.  These regions were formed around 4 billion years ago when lava cooled in the presence of Mars’ ancient global magnetic field, which has since disappeared due to intense solar wind stripping the planet’s atmosphere.
 
The MAVEN mission has observed highly localized auroras over these crustal fields, similar to Earth’s auroras at the poles, but it wasn’t until now that scientists could fully understand the physics of how they form. The study used several instruments aboard the MAVEN spacecraft to build up a picture of the Dungey-like behavior: the Magnetometer and Solar Wind Electron Analyzer instruments, which were used to determine the magnetic configuration and derive electrical currents, and the STATIC (Suprathermal and Thermal Ion Composition) instrument, which was used to measure plasma flows in the ionosphere.
 
“We really pushed the limit of STATIC to get the data we needed,” said Xu. “It was the final piece to the puzzle in understanding these localized auroras.”
 
The realization that a Dungey-like cycle was happening within these crustal magnetic fields answered the question of how the electrons were being energized to create the auroras. It also shows that a Dungey-like mechanism can happen on both large and small scales, giving more insight into where in the solar system this process could be taking place.
 
“This is a remarkable result that changes how we think of Martian auroras and is another important step toward understanding why Mars and Earth have evolved so differently despite being governed by the same underlying physics.” said Shannon Curry, MAVEN’s principal investigator and a research scientist at the Laboratory for Atmospheric and Space Physics at the University of Colorado Boulder. “I am incredibly proud of our team’s work on this discovery and excited to uncover new insights into the Red Planet and its evolution.”
 
By finding out more about this process, scientists also are gaining a better understanding of how the solar environment interacts with the Red Planet as a whole, which is essential for future robotic and crewed missions.
 
“I remember in graduate school discussing with my advisor how the cycling of crustal magnetic fields could work at Mars,” said Xu. “It’s incredible to be part of the team that found the answer to that question.”
 
The MAVEN mission is part of NASA’s Mars Exploration Program portfolio. The mission’s principal investigator is based at the Laboratory for Atmospheric and Space Physics at the University of Colorado Boulder, which also is responsible for managing science operations and public outreach and communications. NASA’s Goddard Space Flight Center in Greenbelt, Maryland, manages the MAVEN mission. Lockheed Martin Space built the spacecraft and is responsible for mission operations. NASA’s Jet Propulsion Laboratory in Southern California provides navigation and Deep Space Network support.
 
For more information on NASA’s MAVEN mission, visit:
 
https://science.nasa.gov/mission/maven/
 
Karen Fox / Alana Johnson
Headquarters, Washington
240-285-5155 / 202-672-4780
karen.c.fox@nasa.gov / alana.r.johnson@nasa.gov
 
Lonnie Shekhtman
NASA’s Goddard Space Flight Center, Greenbelt, Md.
lonnie.shekhtman@nasa.gov

 

After eight months aboard the International Space Station for his first mission, NASA astronaut Chris Williams is preparing to return to Earth. During his assignment, Williams contributed to research for new cancer treatments, advanced the production of materials to improve computers and electronics, ventured into the vacuum of space to complete two spacewalks, and much more. Williams’ work aboard the space station helped to improve life on Earth and prepare for future missions to the Moon and Mars.

Here are some of the research highlights from his mission:

Cancer-fighting constructs

NASA astronaut Chris Williams and ESA (European Space Agency) astronaut Sophie Adenot work to process DNA-inspired materials that could advance new cancer treatments for people on Earth. In space, these rod-shaped materials form more evenly and consistently, which may improve their performance and readiness for treatments on Earth. While there have been major advancements in cancer therapies, many treatments can affect the whole body and cause side effects without fully treating solid tumors. This research aims to enable targeted cancer therapies that reach deep into tumors, stay in the body longer, and release medicine in a more controlled way.

Learn more about DNA Nano Therapeutics-3.

Superior semiconductors

NASA astronaut Chris Williams conducts research to grow semiconductor crystals in space. In microgravity, researchers can grow more crystals of the desired size than can be produced on Earth. Previous research shows that space-grown crystals can offer increased performance to help advance technologies like high-performance computers, artificial intelligence, and medical devices. This research lays the groundwork for commercial semiconductor manufacturing in space and advances the semiconductor industry.

Learn more about In-Space Production of Semimetal-Semiconductor Composite Bulk Crystals in Microgravity (SUBSA-InSPA-SSCug).

Eyeing Earth

NASA astronaut Chris Williams looks out of a cupola window at a red aurora glowing above the Earth. Since the 1960s, astronauts have photographed Earth from space to help scientists monitor the planet’s changing landscapes, natural disasters, and other features over time. Along the way, astronauts also have captured images of celestial objects such as comets, auroras, and the Milky Way.

Sub-zero medical samples

NASA astronaut Chris Williams works with a special freezer aboard the International Space Station that keeps research samples at ultra-cold temperatures until they can return to Earth. Throughout each mission, astronauts collect biological samples like blood and urine to help scientists understand how long-duration spaceflight affects the human body. Observing crew members during their space missions and studying these frozen samples back on Earth helps NASA protect astronaut health during future missions to the Moon, Mars, and beyond.

Learn more about the Minus Eighty-Degree Laboratory Freezer for the International Space Station (MELFI) and Human Research.

Capturing cargo

NASA astronauts Jack Hathaway and Chris Williams watch from the cupola windows as Northrop Grumman’s Cygnus XL cargo spacecraft approaches the International Space Station. The two played key roles in the capture of the spacecraft, which delivered approximately 11,000 pounds of supplies, including fresh food, life support equipment, and scientific research as part of NASA’s Northrop Grumman Commercial Resupply Services 24 mission. Cargo missions help keep the space station operating and provide astronauts with the supplies they need to live, work, and conduct research in orbit.

Blocking biofilms

NASA astronaut Chris Williams works on an investigation that tests the use of ultraviolet light to help prevent the formation of microbial colonies, called biofilms. Biofilms can clog and contaminate water systems, damage equipment, and pose health risks to astronauts. This research aims to keep surfaces cleaner and safeguard systems during long-duration space missions. Using UV light for sanitation also could reduce the need for chemical disinfectants in space, decreasing the risk of chemical exposure and eliminating difficulties in transporting or storing supplies.

Learn more about Germicidal Ultraviolet Light Biofilm Inhibition (GULBI).

Strengthening solar power

NASA astronaut Chris Williams ventured outside the International Space Station for two spacewalks during his mission. In June, he helped make repairs to Canadarm2, a robotic arm that captures cargo spacecraft and deploys external research. In March, Williams prepared the orbiting laboratory for new solar arrays to be added to the station in a future spacewalk. Once installed, the final set of International Space Station Roll Out Solar Arrays (IROSA) will complete the full suite of additional solar power, increasing the station’s power generation by about 30% and enhancing support for scientific research and daily operations. The same solar array technology also powered NASA’s Double Asteroid Redirection Test and could support future missions to the Moon and Mars.

Learn more about the space station’s IROSAs.

Microgravity medicine

NASA astronaut Chris Williams works with hardware to support the development of new cancer and disease treatments by studying the growth of protein crystals for pharmaceuticals. In space, protein crystals form higher-quality structures than they do on Earth, allowing researchers to better understand how to target and treat disease. Here, Williams works with a project that aims to develop a new formula for a cancer treatment that could be taken orally. Growing protein crystals in space paves the way for more commercial companies to create new therapies that could improve patient outcomes on Earth.

Learn more about the Pharmaceutical In-space Laboratory (ADSEP-PIL-10).

Robotic refinement

NASA astronaut Chris Williams works with equipment that tests the performance of small robotic arms in space. Some experiments and operations require very precise movements, where tiny errors can significantly impact results. Understanding how microgravity affects delicate robotic operations helps researchers improve designs for future automated systems that can perform operations while astronauts focus on the most critical tasks.

Learn more about the Test facility for lab-aUtomation System in Kibo (TUSK).

Alpine glaciers, wild coastlines, temperate rainforests, and deep river valleys coexist on the Olympic Peninsula in the northwest corner of Washington state. Surrounded by blue waters, peaceful islands, and bustling population centers, its rugged interior remains a relatively remote bastion of wilderness.

The Olympic Mountains’ imposing terrain comes into focus in this oblique view of the region, captured by an astronaut aboard the International Space Station. The image is a composite, made of several sequential, overlapping photos fused together into a panorama. Olympic National Park encompasses the peninsula’s mountainous core, along with some stretches of the Pacific coastline. Much of the remaining area is either national forest, state-owned land, or tribal territory.

The rock making up the mountains mostly originated beneath the surface of the ocean. From about 55 to 15 million years ago, layers of basalt from undersea eruptions and sand and mud transported seaward by rivers accumulated on the ocean bottom. This material was scraped off the Juan de Fuca plate as it subducted beneath the North American plate, with rock layers crumpling and rising up to 8,000 feet (2,440 meters) above sea level.

Tectonic forces continue to push the mountains skyward, but the countervailing force of erosion in this rainy, snowy corner of the country effectively cancels out the uplift. Snow at higher elevations feeds glaciers that carve out underlying rock. Glaciers in the Olympics are retreating and thinning, however, and their numbers are declining. One study tallied 255 glaciers and perennial snowfields in the range in 2015 and found that 35 glaciers and 16 perennial snowfields had disappeared in the preceding 35 years.

Other erosion is evidenced by the deep valleys radiating out from the snowy peaks. The Hoh, Queets, and Quinault rivers, draining west into the Pacific Ocean (bottom of the frame), are prominent in this view. These verdant valleys are known for their temperate rainforests, and the ancient forest in the Hoh River valley was once considered among the most naturally quiet places in the U.S., uninterrupted by human-caused noise.

Flowing to the north, the Elwha River has a rich natural and human history, including some of the earliest Euro-American exploration of the Olympics. Sponsored by a Seattle newspaper, an expedition from December 1889 to May 1890 crossed the mountain range from north to south, traveling up the Elwha valley and down the Quinault. The party spent several months in the Elwha Valley, their progress hindered by an unusually harsh and snowy winter. 

In the early 1900s, entrepreneurs saw economic opportunity in the valley. Two dams constructed on the river produced power for local industry. But the structures came with costs, such as blocking the migration of once-abundant trout and salmon to their spawning grounds. In 2011 and 2014, the dams were removed in what was then the largest such project in the U.S., and the process of restoring fish populations, seeding native plant communities, and replenishing sediment along the riverbanks commenced.

The mouth of the Elwha forms a delta in the Strait of Juan de Fuca, the waterway bordering the peninsula to the north. The U.S.-Canada border runs through the middle of this 11- to 17-mile-wide (18- to 27-kilometer-wide) channel, with Vancouver Island in British Columbia lying to the north. The strait connects the Pacific Ocean with the Strait of Georgia and Puget Sound. Ship traffic uses the strait to access important West Coast ports, including Seattle and Tacoma, visible along the top-right edge of the image.

Astronaut photographs ISS047-E-104138 through ISS047-E-104144 were acquired on May 6, 2016, with a Nikon D4 digital camera using a focal length of 400 millimeters. They are provided by the ISS Crew Earth Observations Facility and the Earth Science and Remote Sensing Unit at NASA Johnson Space Center. The images were taken by a member of the Expedition 47 crew. The images have been cropped and enhanced to improve contrast, and lens artifacts have been removed. The International Space Station Program supports the laboratory as part of the ISS National Lab to help astronauts take pictures of Earth that will be of the greatest value to scientists and the public, and to make those images freely available on the Internet. Additional images taken by astronauts and cosmonauts can be viewed at the NASA/JSC Gateway to Astronaut Photography of Earth. Story by Lindsey Doermann.

References & Resources

• Fountain, A. G., et al. (2022) Glaciers of the Olympic Mountains, Washington—The past and future 100 years. Journal of Geophysical Research: Earth Surface, 127(4), e2022JF006670. 
• NASA Earth Observatory (2016, February 14) Olympic National Park. Accessed July 22, 2026.
• NASA Earth Observatory (2012, August 25) Restoration of the Elwha River. Accessed July 22, 2026.
• National Park Service (2026, July 7) Olympic National Park. Accessed July 22, 2026.
• Washington State Department of Natural Resources, Olympic Mountains. Accessed July 22, 2026.

Media are invited to NASA’s Langley Research Center in Hampton, Virginia, on Friday, July 31, to attend a media tour and ribbon-cutting ceremony for the Flight Dynamics Research Facility, the agency’s first new wind tunnel in more than 40 years.

The event will include a brief media availability with:

• NASA Administrator Jared Isaacman
• Dr. Trina Dyal, center director, NASA Langley
• Administrator Edward C. Forst, U.S. General Services Administration

This event is in person only and open to members of the media who are United States citizens or lawful permanent residents. Information about timing will be shared closer to the event. NASA’s media accreditation policy is available online.

Media requesting to participate in person must RSVP no later than 5 p.m. EDT on Wednesday, July 29. Media RSVPs must be sent to Kimiko Booker, kimiko.s.booker@nasa.gov, and Brittny McGraw, brittny.v.mcgraw@nasa.gov, with the following information:

• Legal first and last names (must match government identification)
• Email
• Phone number
• Job title and organization

The wind tunnel opening marks a major milestone in the evolution of NASA and the nation’s aeronautics and space research capabilities. The state-of-the-art facility will support research and technology development that will advance NASA’s aeronautics, exploration, and science goals, including establishing a sustained human presence on the lunar surface through the Artemis program and the development of a Moon Base.

Learn more about the Flight Dynamics Research Facility at:

https://go.nasa.gov/4yzKEGQ

-end-

Camille Gallo / Rob Margetta
Headquarters, Washington
202-358-1600
camille.m.gallo@nasa.gov / robert.j.margetta@nasa.gov 

Kimiko Booker / Brittny McGraw
NASA Langley, Hampton, Va.
757-506-5939 / 757-769-3763
kimiko.s.booker@nasa.gov / brittny.v.mcgraw@nasa.gov

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