The STG had to decide on a name for the people who would fly into space. A brainstorming session was held on December 1, 1958. By analogy with "aeronaut" (air traveler), someone came up with the term "astronaut", which meant "star traveler", although Project Mercury's ambitions were far more limited. They thought that they had coined a new word, but the term had been used in science fiction since the 1920s. A three-man panel consisting of Charles J. Donlan, Warren J. North and Allen O. Gamble drew up a civil service job specification for astronauts. The panel proposed that astronauts be in civil service grades 12 to 15, depending on qualifications and experience, with an annual salary of $8,330 to $12,770 (equivalent to $89,852 to $137,744 in 2024). It described the duties of an astronaut:
Although the panel considered that many people might possess the required skills – aircraft pilots, submariners, deep sea divers and mountain climbers were all considered likely prospects – it decided that they could be best met by military test pilots. Accepting only military test pilots would simplify the selection process, and would also satisfy security requirements, as the role would almost certainly involve the handling of classified information. The decision to restrict selection to military test pilots was taken by Glennan, Dryden and Gilruth in the last week of December 1958, but the irony of using military test pilots in a civilian program was not overlooked, and in view of the President's express preference for a space program outside the military, Glennan thought it best to run the decision past Eisenhower. A meeting was arranged with the President, who was convinced by the arguments.
The panel also drew up selection criteria. Astronauts had to be:
The first step in the selection process was to obtain the service records of test pilot school graduates from the United States Department of Defense. All services agreed to cooperate fully, and handed over their records. There were 508 military test pilots in total, of whom 225 were Air Force, 225 Navy, 23 Marine Corps and 35 Army. Donlan, North, Gamble and psychologist Robert B. Voas then went through the records in January 1959, and identified 110 pilots – five Marines, 47 from the Navy, and 58 from the Air Force – who met the rest of the minimum standards. The 110 were then split into three groups, with the most promising in the first group.
The candidates were given three briefings by NASA officials. The first was about NASA and Project Mercury; the second concerned the role of the pilot in the project; and the third was about the proposed astronaut training syllabus. In the afternoon candidates had short individual meetings with the NASA selection committee. It was emphasized that participation was entirely voluntary, that candidates were free to decline, and that there would be no career repercussions if they did so. Several candidates declined at this point.
The rest reported to NASA Headquarters in Washington, DC, the following day for further screening. Voas gave them a series of standardized tests: the Miller Analogies Test to measure IQ; the Minnesota Engineering Analogies Test to measure engineering aptitude; and the Doppelt Mathematical Reasoning Test to measure mathematical aptitude. Donlan, North and Gamble conducted interviews in which they asked technical questions, and queried candidates about their motivations for applying to the program. Candidates were evaluated by two USAF psychiatrists, George E. Ruff and Edwin Z. Levy. A USAF flight surgeon, William S. Augerson, went over the candidates' medical records. Some were found to be over the height limit, and were eliminated at this juncture.
The process was repeated with a second group of 34 candidates a week later. Of the 69, six were found to be over the height limit, 15 were eliminated for other reasons, and 16 declined. This left NASA with 32 candidates: 15 from the Navy, 15 from the Air Force and two from the Marine Corps. Since this was more than expected, NASA decided not to bother with the remaining 41 candidates, as 32 candidates seemed a more than adequate number from which to select 12 astronauts as planned. The degree of interest also indicated that far fewer would drop out during training than anticipated, which would result in training astronauts who would not be required to fly Project Mercury missions. It was therefore decided to cut the number of astronauts selected to just six.
Despite their rejection from the first group of astronauts, many of the 25 finalists who were passed over still had successful military careers. Three eventually became astronauts: Pete Conrad and Jim Lovell, who were selected with the next group in 1962; and Edward Givens, who was selected with the fifth group in 1966. Others achieved high rank: Lawrence Heyworth Jr. became a rear admiral, Robert B. Baldwin and William P. Lawrence became vice admirals, and Thomas B. Hayward became an admiral. He commanded the Seventh Fleet and the Pacific Fleet, and was Chief of Naval Operations. Three of the finalists later died in aircraft accidents: Halvor M. Ekeren, Jr., on April 8, 1959; Jack B. Mayo on January 11, 1961; and Hal R. Crandall on July 24, 1963. Finalist Robert G. Bell died in the May 16, 1965, explosion of multiple aircraft at Bien Hoa Air Base, Vietnam.
All were male and white. Women were not yet accepted into the military test pilot schools, and the first African American to graduate from the USAF Experimental Test Pilot School, John L. Whitehead Jr., did so only in January 1958, and was not one of the finalists. Yet the Mercury Seven were similar beyond what was a simple result of the selection criteria. Four were their fathers' namesakes. All were the eldest or only sons in their families. All were born in the United States, and were raised in small towns. All were married with children, and all were Protestants.
Their ages at the time of selection ranged from 32 (Cooper) to 37 (Glenn). Shepard was the tallest, at the maximum height of 5 feet 11 inches (1.80 m); Grissom, the shortest at 5 feet 7 inches (1.70 m). Weight was not a firm criterion like height, as losing weight was always possible, but the Mercury spacecraft set a limit of 180 pounds (82 kg). Cooper was the lightest, at 150 pounds (68 kg), while Glenn was at the maximum weight of 180 pounds (82 kg), and Schirra was slightly overweight at 185 pounds (84 kg), and had to lose weight to be accepted. Both had to watch their weight carefully while they were in the space program. IQs ranged from 135 to 147.
All seven had attended post-secondary institutions in the 1940s. Of the five astronauts who had completed undergraduate degrees before being selected, two (Shepard and Schirra) were graduates of the United States Naval Academy at Annapolis, Maryland, in 1944 and 1945, respectively. Following a decade of intermittent studies, Cooper completed his bachelor's degree in aerospace engineering at the Air Force Institute of Technology (AFIT) in 1956. Grissom earned a bachelor's degree in mechanical engineering from Purdue University in 1950, and a second bachelor's degree, in aeromechanics, from the AFIT in 1956. Slayton graduated from the University of Minnesota with a bachelor's degree in aeronautical engineering in 1949. Average flying hours were 3,500, of which 1,700 was in jets. Most were fighter pilots except Carpenter, who flew multi-engine patrol planes for most of his career.
Glenn and Carpenter did not meet all of their schools' degree requirements; Glenn had not completed his senior year in residence or his final proficiency exam, and Carpenter had not finished his final course in heat transfer. Both were admitted on the basis of professional equivalency, and were ultimately awarded their bachelor's degrees after their 1962 space flights—Glenn in engineering from Muskingum College and Carpenter in aeronautical engineering from the University of Colorado at Boulder.
NASA introduced the astronauts in Washington, DC, on April 9, 1959. Although the agency viewed Project Mercury's purpose as an experiment to determine whether humans could survive space travel, the seven men immediately became national heroes and were compared by Time magazine to "Columbus, Magellan, Daniel Boone, and the Wright brothers." Two hundred reporters overflowed the room used for the announcement and alarmed the astronauts, who were unused to such a large audience.
Because they wore civilian clothes, the audience did not see them as military test pilots but "mature, middle-class Americans, average in height and visage, family men all." To the astronauts' surprise, the reporters asked questions about their personal lives instead of their war records or flight experience, or details about Project Mercury. After Glenn responded by speaking eloquently "on God, country, and family," the others followed his example, and were applauded by the reporters.
Test pilots accepted that their jobs were dangerous; during Glenn's three years serving as one for the Navy, 12 had died. When asked about how their families thought about their taking on such a dangerous job, most of the seven were surprised, as they had never considered this before. Glenn replied that he "didn't think that any of us could really go on with something like this if we didn't have pretty good backing at home. My wife's attitude towards this has been the same as it has been all along through my flying. If it is what I want to do, she is behind it, and the kids are too, one hundred percent." Carpenter received even more applause when he noted that he was at sea when NASA had phoned to inform him that he had been chosen, and his wife Rene had accepted on his behalf. His selection had also tested the Navy's commitment to Project Mercury when the skipper of his ship, the USS Hornet, refused to release him, and Burke had to personally intervene.
Cooper's wife Trudy had left him in January 1959 after he had an affair with another officer's wife, and had moved to San Diego. During the selection interviews, he had been asked about his domestic relationship, and had lied, saying that he and Trudy had a good, stable marriage. Aware that NASA wanted to project an image of its astronauts as loving family men, and that his story would not stand up to scrutiny, he drove down to San Diego to see Trudy at the first opportunity. Lured by the prospect of a great adventure for herself and her daughters, she agreed to go along with the charade and pretend that they were a happily married couple.
The Mercury spacecraft was less finished than the astronauts' previous vehicles. After watching an Atlas rocket explode during launch on May 18, 1959, they publicly joked "I'm glad they got that out of the way" – typical gallows humor that test pilots used to cope with danger – but privately calculated that one of the seven would die during Project Mercury. The astronauts participated in the project's design and planning, dividing the work between them. Carpenter had training in airborne electronics and celestial navigation, so he assumed responsibility for the spacecraft's communications and navigation systems. Grissom had a degree in mechanical engineering, so he became responsible for the attitude control systems. Glenn had experience flying many types of aircraft, so he oversaw the cockpit layout. Schirra drew responsibility for the life support systems and the pressure suits. Drawing on his experience as a Naval officer, Shepard looked after the tracking network and liaised with the Navy on recovery operations. Cooper and Slayton were Air Force officers with engineering backgrounds, so they dealt with the Redstone Arsenal and Convair, who built the Redstone and Atlas boosters used by Project Mercury. The astronauts affected the design of the Mercury spacecraft in significant ways, insisting that a window be installed, and pressing for a greater degree of astronaut autonomy in flying the spacecraft.
The astronauts remained on active duty as military officers, and were paid according to their rank. To supplement their travel, they were provided a $9 per diem (equivalent to $97 in 2024) for day trips, and a $12 per diem (equivalent to $129 in 2024) for overnight trips, which did not cover the cost of hotels and restaurant meals. As a result, astronauts avoided spending money while traveling, as they were personally responsible for costs over their allotted per diem. An important component of their income was monthly flight pay, which ranged from $190 to $245 (equivalent to $2,049 to $2,643 in 2024).
The astronauts traveled to frequent meetings around the country on commercial flights, which forced them to earn their flight pay on weekends. Grissom and Slayton regularly drove to Langley Air Force Base, and attempted to fly the required four hours a month, but had to compete for T-33 aircraft with colonels and generals. Cooper traveled to McGhee Tyson Air National Guard Base in Tennessee, where a friend let him fly higher-performance F-104B jets. This came up when Cooper had lunch with William Hines, a reporter for The Washington Star, and was duly reported in the paper. Cooper then discussed the issue with Congressman James G. Fulton. The matter was taken up by the House Committee on Science and Astronautics. Within weeks the astronauts were given priority access to USAF T-33s, F-102s and F-106s at Langley. In 1962, NASA acquired a fleet of T-38s for their use.
The Mercury astronauts established the style and appearance of astronauts. "I soon learned", Gene Kranz later recalled, "if you saw someone wearing a short-sleeved Ban-Lon shirt and aviator sunglasses, you were looking at an astronaut." While busy with the intense training for their flights, they also drank and partied. Some had affairs with the female groupies that flocked around them. NASA actively sought to protect the astronauts and the agency from negative publicity and maintain an image of "clean-cut, all-American boy[s]." The seven Mercury astronauts agreed to share equally any proceeds from interviews regardless of who flew first.
They were forbidden from being compensated for radio or television appearances, or endorsing commercial products, but were allowed to sell their personal stories. In August 1959, they hired an agent, C. Leo DeOrsey, and he negotiated an exclusive contract with Life magazine on behalf of the astronauts for $500,000 (equivalent to $5,400,000 in 2024) in exchange for exclusive access to their private lives, homes, and families. The money was used as life insurance. Between August, 1959, and May 15, 1963, they each received $71,428.71 (equivalent to $733,619 in 2024). Their official spokesman from 1959 to 1963 was NASA's public affairs officer, USAF Lieutenant Colonel John "Shorty" Powers, who as a result became known in the press as the "eighth astronaut".
As additional groups of astronauts were selected in the 1960s, the Mercury Seven remained in control of management decisions. The Astronaut Office, which was headed by Shepard, was one of three divisions in the Directorate of Flight Crew Operations, which was headed by Slayton. Since twenty-six of the first thirty astronauts were military personnel, the Astronaut Office had a military character, although few of the astronauts wore their uniforms even as much as once a year. There was a bi-weekly military-style pilots' meeting at which activities planned for the upcoming two weeks would be discussed. A "captain's mast" was held afterwards to adjudicate disputes.
Shepard ran the Astronaut Office on a "rank has its privileges" basis. The Mercury and 1962 astronauts had their own allocated parking spaces outside Building 4 at Johnson Space Center, while astronauts from later groups had to compete for the remaining spaces allotted to astronauts. While Shepard prohibited junior astronauts from receiving gifts and consulting or teaching part-time, he remained vice president and part owner of the Baytown National Bank in Houston, and devoted much of his time to it.
Training was always ungraded; the Mercury astronauts had nothing to gain and much to lose from being objectively compared to the newer classes, as it could threaten their privileged status, managerial control, and priority for flight assignments. The astronaut's attendance at their training events was voluntary. The character of the Astronaut Office would only change after Mercury astronauts retired in the 1970s, and control passed to George Abbey.
The Mercury Seven wrote first-hand accounts of their selection and preparation for the Mercury missions in the 1962 book We Seven. In 1979 Tom Wolfe published a less sanitized version of their story in The Right Stuff. Wolfe's book was the basis for the 1983 film of the same name directed by Philip Kaufman, and the 2020 TV series of the same name.
Glenn became the first American in orbit in 1962. In 1998 (while a sitting U.S. senator) he flew on the Space Shuttle Discovery, and became the oldest person to fly in space at the time, aged 77. He was the last living member of the Mercury Seven when he died in 2016 at the age of 95.
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Atkinson & Shafritz 1985, p. 34. - Atkinson, Joseph D.; Shafritz, Jay M. (1985). The Real Stuff: A History of NASA's Astronaut Recruitment Program. Praeger special studies. New York: Praeger. ISBN 978-0-03-005187-6. OCLC 12052375. https://search.worldcat.org/oclc/12052375
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Swenson, Grimwood & Alexander 1966, p. 130. - Swenson, Loyd S. Jr.; Grimwood, James M.; Alexander, Charles C. (1966). This New Ocean: A History of Project Mercury (PDF). The NASA History Series. Washington, DC: NASA. OCLC 569889. NASA SP-4201. https://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/19990026158.pdf
Atkinson & Shafritz 1985, pp. 36–37. - Atkinson, Joseph D.; Shafritz, Jay M. (1985). The Real Stuff: A History of NASA's Astronaut Recruitment Program. Praeger special studies. New York: Praeger. ISBN 978-0-03-005187-6. OCLC 12052375. https://search.worldcat.org/oclc/12052375
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Burgess 2011, p. 35. - Burgess, Colin (2011). Selecting the Mercury Seven: The Search for America's First Astronauts. Springer-Praxis books in space exploration. New York; London: Springer. ISBN 978-1-4419-8405-0. OCLC 747105631. https://search.worldcat.org/oclc/747105631
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Atkinson & Shafritz 1985, p. 38. - Atkinson, Joseph D.; Shafritz, Jay M. (1985). The Real Stuff: A History of NASA's Astronaut Recruitment Program. Praeger special studies. New York: Praeger. ISBN 978-0-03-005187-6. OCLC 12052375. https://search.worldcat.org/oclc/12052375
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Burgess 2011, p. 38. - Burgess, Colin (2011). Selecting the Mercury Seven: The Search for America's First Astronauts. Springer-Praxis books in space exploration. New York; London: Springer. ISBN 978-1-4419-8405-0. OCLC 747105631. https://search.worldcat.org/oclc/747105631
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Atkinson & Shafritz 1985, pp. 43–47. - Atkinson, Joseph D.; Shafritz, Jay M. (1985). The Real Stuff: A History of NASA's Astronaut Recruitment Program. Praeger special studies. New York: Praeger. ISBN 978-0-03-005187-6. OCLC 12052375. https://search.worldcat.org/oclc/12052375
" "Rendezvous with Destiny". Time. April 20, 1959. Archived from the original on June 18, 2007. Retrieved January 27, 2019. https://web.archive.org/web/20070618053311/http://www.time.com/time/magazine/article/0,9171,864563,00.html
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"Astronaut Selection". Project Mercury Overview. NASA. November 30, 2006. Retrieved January 11, 2015. https://www.nasa.gov/mission_pages/mercury/missions/astronaut.html#.VLKiV3vAuJw
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