Harrison Hagan "Jack" Schmitt is an American geologist, former NASA astronaut, university professor, former U.S. senator from New Mexico, and the most recent living person—and only person without a background in military aviation—to have walked on the Moon.
Guion Stewart Bluford Jr. is an American aerospace engineer, retired United States Air Force (USAF) officer and fighter pilot, and former NASA astronaut, in which capacity he became the first African American to go to space. While assigned to NASA, he remained a USAF officer rising to the rank of colonel. He participated in four Space Shuttle flights between 1983 and 1992. In 1983, as a member of the crew of the Orbiter Challenger on the mission STS-8, he became the first African American in space as well as the second black person in space, after Cuban cosmonaut Arnaldo Tamayo Méndez.
Colin Michael Foale is a British-American astrophysicist and a former NASA astronaut. He is a veteran of six space missions, and is the only NASA astronaut to have flown extended missions aboard both Mir and the International Space Station. He was the second Briton in space and the first to perform a space walk. Until 17 April 2008, he held the record for most time spent in space by a US citizen: 374 days, 11 hours, 19 minutes, and as of 2024 he held the cumulative-time-in-space record for a British citizen.
Kenneth Dwane "Sox" Bowersox is a United States Navy officer and former NASA astronaut. He is a veteran of five Space Shuttle launches and an extended stay aboard the International Space Station. When he launched on STS-73 at the age of 38 years and 11 months, he became the youngest person to command a Space Shuttle.
Piers John Sellers was a British-American meteorologist, NASA astronaut and Director of the Earth Science Division at NASA/GSFC. He was a veteran of three Space Shuttle missions. Sellers attended Cranbrook School, Cranbrook, Kent, United Kingdom, until 1973, and achieved a bachelor's degree in ecological science from the University of Edinburgh in 1976. In 1981 he gained a doctorate in biometeorology from the University of Leeds. In 2011, Sellers retired from the NASA Astronaut Corps.
Pamela Ann Melroy is an American retired United States Air Force officer and NASA astronaut serving as the deputy administrator of NASA. She served as pilot on Space Shuttle missions STS-92 and STS-112 and commanded mission STS-120 before leaving the agency in August 2009. After serving as deputy program manager of Space Exploration Initiatives with Lockheed Martin, Melroy joined the Federal Aviation Administration in 2011, where she was a senior technical advisor and director of field operations for the FAA's Office of Commercial Space Transportation.
Kathryn Dwyer Sullivan is an American geologist, oceanographer, and former NASA astronaut and US Navy officer. She was a crew member on three Space Shuttle missions.
Henry Warren Hartsfield Jr. was a United States Air Force Colonel and NASA astronaut who logged over 480 hours in space. He was inducted into the United States Astronaut Hall of Fame in 2006.
William McMichael "Bill" Shepherd, , is an American former Navy SEAL, aerospace, ocean, and mechanical engineer, and NASA astronaut, who served as commander of Expedition 1, the first crew on the International Space Station. He is a recipient of the Congressional Space Medal of Honor.
Karol Joseph "Bo" Bobko was an American aerospace engineer, U.S. Air Force officer, test pilot, and a USAF and NASA astronaut. Bobko was the first graduate of the U.S. Air Force Academy to travel in space and the first person to fly on three different space shuttles across three different missions: STS-6, STS-51-D, STS-51-J.
Charles Frank Bolden Jr. is a former Administrator of NASA, a retired United States Marine Corps Major General, and a former astronaut who flew on four Space Shuttle missions.
Dafydd Rhys "David" Williams is a Canadian physician, public speaker, author and retired CSA astronaut. Williams was a mission specialist on two Space Shuttle missions. His first spaceflight, STS-90 in 1998, was a 16-day mission aboard Space Shuttle Columbia dedicated to neuroscience research. His second flight, STS-118 in August 2007, was flown by Space Shuttle Endeavour to the International Space Station. During that mission he performed three spacewalks, becoming the third Canadian to perform a spacewalk and setting a Canadian record for total number of spacewalks. These spacewalks combined for a total duration of 17 hours and 47 minutes.
Thomas David Jones is a former United States astronaut. He was selected to the astronaut corps in 1990 and completed four Space Shuttle flights before retiring in 2001. He flew on STS-59 and STS-68 in 1994, STS-80 in 1996, and STS-98 in 2001. His total mission time was 53 days 48 minutes. He works as a planetary scientist, space operations consultant, astronaut speaker, and author.
James Patrick "Mash" Dutton Jr. is an engineer, former NASA astronaut pilot of the Class of 2004, and a former test pilot in the US Air Force with the rank of colonel.
Clayton Conrad Anderson is a retired NASA astronaut. Launched on STS-117, he replaced Sunita Williams on June 10, 2007, as a member of the ISS Expedition 15 crew. He is currently an author, a motivational speaker, and a Professor of Practice at Iowa State University in Ames, Iowa. In 2022 he became the president and CEO of the Strategic Air Command & Aerospace Museum.
The Astrogeology Science Center is the entity within the United States Geological Survey concerned with the study of planetary geology and planetary cartography. It is housed in the Shoemaker Building in Flagstaff, Arizona. The Center was established in 1963 by Eugene Merle Shoemaker to provide lunar geologic mapping and to assist in training astronauts destined for the Moon as part of the Apollo program.
Yvonne Darlene Cagle is an American physician, professor, retired U.S. Air Force Colonel, and NASA astronaut. Cagle joined NASA as an astronaut in 1996. She is one of six African American woman astronauts.
Andrew Jay "Drew" Feustel is a former American/Canadian NASA astronaut and geophysicist. Following several years working as a geophysicist, Feustel was selected as an astronaut candidate by NASA in July 2000. He is the veteran of 3 space flights with NASA. His first spaceflight in May 2009, STS-125, lasted just under 13 days. This was a mission with six other astronauts to repair the Hubble Space Telescope, aboard Space Shuttle Atlantis. Feustel performed three spacewalks during the mission. His second spaceflight was STS-134, which launched on May 16, 2011, and landed on June 1, 2011. STS-134 was the penultimate Space Shuttle flight. Feustel returned to space on March 21, 2018, on Soyuz MS-08 with Expedition 55/56. For expedition 56, he commanded the International Space Station, before handing over to Alexander Gerst on October 3, 2018.
Randolph James "Komrade" Bresnik is a retired officer in the United States Marine Corps and an active NASA astronaut. A Marine Aviator by trade, Bresnik was selected as a member of NASA Astronaut Group 19 in May 2004. He first launched to space on STS-129, then served as flight engineer for Expedition 52, and as ISS commander for Expedition 53.
Leon Theodore "Lee" Silver was an American geologist who was professor of geology at the California Institute of Technology (Caltech). He was an instructor to the Apollo 13, 15, 16, and 17 astronaut crews. Working with the National Aeronautics and Space Administration (NASA), he taught astronauts how to perform field geology, essentially creating lunar field geology as a new discipline. His training is credited with a significant improvement in the J-Mission Apollo flights' scientific returns. After the Apollo program, he became a member of the United States National Academy of Sciences in 1974. He retired in 1996 as the W. M. Keck Foundation Professor for Resource Geology, emeritus, at Caltech.
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