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By NASA
NASA astronaut and Expedition 65 Flight Engineer Megan McArthur removes Kidney Cells-02 hardware inside the Space Automated Bioproduct Laboratory and swaps media inside the Microgravity Science Glovebox. The human research study seeks to improve treatments for kidney stones and osteoporosis NASA astronaut Megan McArthur has retired, concluding a career spanning more than two decades. A veteran of two spaceflights, McArthur logged 213 days in space, including being the first woman to pilot a SpaceX Dragon spacecraft and the last person to “touch” the Hubble Space Telescope with the space shuttle’s robotic arm.
McArthur launched as pilot of NASA’s SpaceX Crew-2 mission in April 2021, marking her second spaceflight and her first long-duration stay aboard the International Space Station. During the 200-day mission, she served as a flight engineer for Expeditions 65/66, conducting a wide array of scientific experiments in human health, materials sciences, and robotics to advance exploration of the Moon under Artemis and prepare to send American astronauts to Mars.
Her first spaceflight was STS-125 in 2009, aboard the space shuttle Atlantis, the fifth and final servicing mission to Hubble. As a mission specialist, she was responsible for capturing the telescope with the robotic arm, as well as supporting five spacewalks to update and repair Hubble after its first 19 years in space. She also played a key role in supporting shuttle operations during launch, rendezvous with the telescope, and landing.
“Megan’s thoughtful leadership, operational excellence, and deep commitment to science and exploration have made a lasting impact,” said Steve Koerner, acting director of NASA’s Johnson Space Center in Houston. “Her contributions have helped shape the future of human space exploration, and we are incredibly grateful for her service.”
In addition to her flight experience, McArthur has served in various technical and leadership roles within NASA. In 2019, she became the deputy division chief of the Astronaut Office, supporting astronaut training, development, and ongoing spaceflight operations. She also served as the assistant director of flight operations for the International Space Station Program starting in 2017.
Since 2022, McArthur has served as the chief science officer at Space Center Houston, NASA Johnson’s official visitor center. Continuing in this role, she actively promotes public engagement with space exploration themes, aiming to increase understanding of the benefits to humanity and enhance science literacy.
“Megan brought a unique combination of technical skill and compassion to everything she did,” said Joe Acaba, chief of the Astronaut Office at NASA Johnson. “Whether in space or on the ground, she embodied the best of what it means to be an astronaut and a teammate. Her contributions will be felt by the next generation of explorers she helped train.”
McArthur was born in Honolulu and raised as a “Navy kid” in many different locations worldwide. She earned a Bachelor of Science in aerospace engineering from the University of California, Los Angeles, and a doctorate in oceanography from the Scripps Institution of Oceanography at the University of California, San Diego. Before being selected as an astronaut in 2000, she conducted oceanographic research focusing on underwater acoustics, which involved shipboard work and extensive scuba diving.
McArthur is married to former NASA astronaut Robert Behnken, who also flew aboard the Dragon Endeavour spacecraft during the agency’s SpaceX Demo-2 mission in 2020.
“It was an incredible privilege to serve as a NASA astronaut, working with scientists from around the world on cutting-edge research that continues to have a lasting impact here on Earth and prepares humanity for future exploration at the Moon and Mars,” said McArthur. “From NASA’s Hubble Space Telescope to the International Space Station, our research lab in low Earth orbit, humanity has developed incredible tools that help us answer important scientific questions, solve complex engineering challenges, and gain a deeper understanding of our place in the universe. Seeing our beautiful planet from space makes it so clear how fragile and precious our home is, and how vital it is that we protect it. I am grateful I had the opportunity to contribute to this work, and I’m excited to watch our brilliant engineers and scientists at NASA conquer new challenges and pursue further scientific discoveries for the benefit of all.”
To learn more about NASA’s astronauts and their contributions to space exploration, visit:
https://www.nasa.gov/astronauts
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Shaneequa Vereen
Johnson Space Center, Houston
281-483-5111
shaneequa.y.vereen@nasa.gov
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By NASA
From left to right: JAXA (Japan Aerospace Exploration Agency) astronaut Kimiya Yui, and NASA astronauts Jonny Kim (seated), Zena Cardman, and Mike Fincke conduct training scenarios with their instructors at NASA’s Johnson Space Center in Houston, for their upcoming mission to the International Space Station. Credit: NASA/Helen Arase Vargas NASA astronaut Jonny Kim and JAXA (Japan Aerospace Exploration Agency) astronaut Kimiya Yui will connect with students in New York as they answer prerecorded science, technology, engineering, and mathematics (STEM) questions aboard the International Space Station.
The Earth-to-space call will begin at 9:20 a.m. EDT on Friday, Sept. 5, and will stream live on the agency’s Learn With NASA YouTube channel.
Media interested in covering the event must RSVP by 5 p.m. Wednesday, Sept. 3, to Sara Sloves at: 917-441-1234 or ssloves@thecomputerschool.org.
The Computer School will host this event in New York for middle school students. The goal of this event is to extend learning by exposing students to the real-world experiences and engineering challenges of astronauts working and living aboard the International Space Station.
For nearly 25 years, astronauts have continuously lived and worked aboard the space station, testing technologies, performing science, and developing skills needed to explore farther from Earth. Astronauts communicate with NASA’s Mission Control Center in Houston 24 hours a day through SCaN’s (Space Communications and Navigation) Near Space Network.
Research and technology investigations taking place aboard the space station benefit people on Earth and lay the groundwork for other agency deep space missions. As part of NASA’s Artemis campaign, the agency will send astronauts to the Moon to prepare for future human exploration of Mars, inspiring the world through discovery in a new Golden Age of innovation and exploration.
See more information on NASA in-flight calls at:
https://www.nasa.gov/stemonstation
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Gerelle Dodson
Headquarters, Washington
202-358-1600
gerelle.q.dodson@nasa.gov
Sandra Jones
Johnson Space Center, Houston
281-483-5111
sandra.p.jones@nasa.gov
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Last Updated Aug 28, 2025 LocationNASA Headquarters Related Terms
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By NASA
4 min read
Preparations for Next Moonwalk Simulations Underway (and Underwater)
Robert Mosher, HIAD materials and processing lead at NASA Langley, holds up a piece of webbing material, known as Zylon, which comprise the straps of the HIAD.NASA/Joe Atkinson Components of a NASA technology that could one day help crew and cargo enter harsh planetary environments, like that of Mars, are taking an extended trip to space courtesy of the United States Space Force.
On Aug. 21, several pieces of webbing material, known as Zylon, which comprise the straps of the HIAD (Hypersonic Inflatable Aerodynamic Decelerator) aeroshell developed by NASA’s Langley Research Center in Hampton, Virginia, launched to low Earth orbit along with other experiments aboard the Space Force’s X-37B Orbital Test Vehicle. This trip will help researchers characterize how the Zylon webbing responds to long-duration exposure to the harsh vacuum of space.
The strap material on the HIAD aeroshell serves two purposes – short strap lengths hold together HIAD’s inflatable rings and longer pieces help to distribute the load more evenly across the cone-shaped structure. The HIAD aeroshell technology could allow larger spacecraft to safely descend through the atmospheres of celestial bodies like Mars, Venus, and even Saturn’s moon, Titan.
“We’re researching how HIAD technology could help get humans to Mars. We want to look at the effects of long-term exposure to space – as if the Zylon material is going for a potential six to nine-month mission to Mars,” said Robert Mosher, HIAD materials and processing lead at NASA Langley. “We want to make sure we know how to protect those structural materials in the long term.”
The Zylon straps are visible here during the inflation of LOFTID as part of a November 2022 orbital flight test. LOFTID was a version of the HIAD aeroshell — a technology that could allow larger spacecraft to safely descend through the atmospheres of celestial bodies like Mars, Venus, and even Saturn’s moon, Titan.NASA Flying Zylon material aboard the Space Force’s X-37B mission will help NASA researchers understand what kind of aging might occur to the webbing on a long space journey before it experiences the extreme environments of atmospheric entry, during which it has to retain strength at high temperatures.
Multiple samples are in small canisters on the X-37B. Mosher used two different techniques to put the strap material in the canisters. Some he tightly coiled up, others he stuffed in.
“Typically, we pack a HIAD aeroshell kind of like you pack a parachute, so they’re compressed,” he said. “We wanted to see if there was a difference between tightly coiled material and stuff-packed material like you would normally see on a HIAD.”
Some of the canisters also include tiny temperature and humidity sensors set to collect readings at regular intervals. When the Space Force returns the samples from the X-37B flight, Mosher will compare them to a set of samples that have remained in canisters here on Earth to look for signs of degradation.
The material launched to space aboard the Space Force’s X-37B Orbital Test Vehicle, seen here earlier this year.Courtesy of the United States Space Force “Getting this chance to have the Zylon material exposed to space for an extended period of time will begin to give us some data on the long-term packing of a HIAD,” Mosher said.
Uninflated HIAD aeroshells can be packed into small spaces within a spacecraft. This results in a decelerator that can be much larger than the diameter of its launch vehicle and can therefore land much heavier loads and deliver them to higher elevations on a planet or other celestial body.
Rigid aeroshells, the sizes of which are dictated by the diameters of their launch vehicles, typically 4.5 to 5 meters, are capable of landing well-equipped, car-sized rovers on Mars. By contrast, an inflatable HIAD, with an 18-20m diameter, could land the equivalent of a small, fully furnished ranch house with a car in the garage on Mars.
NASA’s HIAD aeroshell developments build on the success of the agency’s LOFTID (Low-Earth Orbit Flight Test of an Inflatable Decelerator) mission that launched on Nov. 10, 2022, resulting in valuable insights into how this technology performs under the stress of re-entering Earth’s atmosphere after being exposed to space for a short time period.
Learn more: https://www.nasa.gov/space-technology-mission-directorate/tdm/
About the Author
Joe Atkinson
Public Affairs Officer, NASA Langley Research Center
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Last Updated Aug 27, 2025 Related Terms
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By NASA
NASA/Josh Valcarcel NASA astronaut Zena Cardman poses for a portrait in a photography studio on March 22, 2024, at NASA’s Johnson Space Center in Houston, Texas.
Cardman is currently aboard the International Space Station, where she perform research, technology demonstrations, and maintenance activities. Recently, she took a robotics test on a computer for the portion of the CIPHER study that measures space-caused changes to her brain structure and function; she also installed high-definition cameras on a spacesuit helmet.
Cardman launched to the space station on NASA’s SpaceX Crew-11 mission. Members of Crew-11 will contribute to NASA’s Artemis campaign by simulating Moon landing scenarios that future crews may encounter near the lunar South Pole.
Learn more about station activities by following the space station blog.
Image credit: NASA/Josh Valcarcel
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