| Buzz Aldrin, Massachussetts Beta '62 | Gemini XII, Apollo XI (second man to walk on the moon) |
| Scott D. Altman, Illinois Alpha '81 | STS-90, STS-106, STS-109 |
| William A. Anders, Ohio Eta '62 | Apollo VIII (first flight to the moon) |
| James P. Bagian, Pennsylvania Zeta '73 | STS-29, STS-40 |
| Michael A. Baker, Texas Alpha '75 | STS-43, STS-52 |
| Dr. John-David F. Bartoe, Pennsylvania Alpha '66 | 51F; flight scientist |
| Charles A. Bassett, II, Texas Beta '60 | (deceased 2/28/66) |
| Stephen G. Bowen, Maryland Gamma '86 | |
| Guion S. Bluford, Jr., Ohio Eta '73 | STS-8, STS-39, STS-53, 61-A |
| Kenneth D. Bowersox, Maryland Gamma '78 | STS-50, STS-61,STS-73 |
| Roy D. Bridges Jr., Colorado Zeta '65 | STS 51-F |
| Mark N. Brown, Indiana Alpha '73 | STS-28, STS-48 |
| John S. Bull, Texas Gamma '57 | resigned |
| Eugene A. Cernan, Indiana Alpha '56 | Gemini IX (second space walker), Apollo X, Apollo XVII, (two trips to moon) |
| Roger B. Chaffee, Indiana Alpha '57 | died in Apollo I spacecraft fire at Kennedy Space Center January 27, 1967 |
| Gregory E. Chamitoff, California Mu '84 | |
| Mary L. Cleave, Utah Gamma '79 | 61-B, STS-30 |
| Robert L. Crippen, Texas Alpha '60 | STS-1, STS-7, 41-C, 41-G |
| Dr. N. Jan Davis, Alabama Alpha '77 | STS-47 |
| Dr. Bonnie J. Dunbar, Texas Epsilon '83 | 61-A, STS-32, STS-50 |
| Donn F. Eisele, Ohio Eta '60 | Apollo VII (deceased 12/2/87) |
| Joe H. Engle, Kansas Alpha '55 | STS-2, 51-I, (fin) |
| Ronald E. Evans, Kansas Alpha '56 | Apollo XVII (deceased 4/6/90) |
| John M. Fabian, Washington Beta '62 | STS-7, 51-G, (fin) |
| Stephen N. Frick, Maryland Gamma '86 | STS-110, STS-122 |
| C. Gordon Fullerton, California Beta '57 | STS-3, 51-F |
| Dale A. Gardner, Illinois Alpha '70 | STS-8, 51-A |
| Owen K. Garriott, Oklahoma Alpha '53 | Skylab III, STS-9 |
| Edward G. Gibson, New York Kappa '59 | Skylab IV |
| Virgil I. "Gus" Grissom, Indiana Alpha '50 | Mercury IV, Gemini III, died in Apollo I spacecraft fire at Kennedy Space Center January 27, 1967 |
| Fred W. Haise, Jr., Oklahoma Alpha '59 | Apollo XIII |
| Terry J. Hart, Pennsylvania Alpha '68 | 41-C |
| Charles O. Hobaugh, Maryland Gamma '84 | STS-118 |
| Rick D. Husband, Texas Beta '80 | STS-107; died in Columbia explosion, February 1, 2003 |
| Gregory C. Johnson, Washington Alpha '77 | |
| Byron K. Lichtenberg, Rhode Island Alpha '69 | STS-9, STS-45; flight scientist |
| Michael J. Massimino, New York Alpha '84 | STS-109 |
| Richard A. Mastracchio, Connecticut Beta '82 | STS-118 |
| Michael J. McCulley, Indiana Alpha '70 | STS-34 (fin) |
| James A. McDivitt, Michigan Gamma '59 | Gemini IV, Apollo IX |
| Carl J. Meade, Texas Alpha '73 | STS-50 |
| Steven R. Nagel, Illinois Alpha '69 | 51-G, 61-A, STS-37 |
| Lisa M. Nowak, Maryland Gamma '85 | STS-121 |
| William A. Oefelein, Oregon Alpha '88 | STS-116 |
| Ellison S. Onizuka, Colorado Beta '69 | 51-C, 51-L, died in Challenger explosion at Kennedy Space Center, January 28, 1986 |
| Alan G. Poindexter, Georgia Alpha '86 | STS-122 |
| Joseph M. Prahl, Ohio Alpha '63 | Backup payload specialist |
| Judith A. Resnik, Pennsylvania Gamma '70 | 41-D, 51-L, died in Challenger explosion at Kennedy Space Center, January 28, 1986 |
| Richard N. Richards, Maryland Alpha '69 | STS-28, STS-41, STS-50 |
| Albert Sacco, Jr., Massachussetts Epsilon '73 | STS-73; payload specialist |
| Francis R. "Dick" Scobee, Arizona Alpha '65 | 41-C, 51-L, died in Challenger explosion at Kennedy Space Center, January 28, 1986 |
| David R. Scott, Massachussetts Beta '62 | Gemini 8, Apollo IX, Apollo XV (67 hours on moon) |
| Brewster H. Shaw, Jr., Wisconsin Alpha '67 | STS-9, 61-B, STS-28 |
| Richard H. Truly, Georgia Alpha '59 | STS-2, STS-8 |
| Edward H. White, II, Michigan Gamma '52 | Gemini IV (USA's 1st "space walker"), died in Apollo I spacecraft fire at Kennedy Space Center January 27, 1967 |
| Clifton C. Williams, Jr., Alabama Alpha '54 | (deceased 10/5/67) |
| John W. Young, Georgia Alpha '52 | Gemini III, Gemini X, Apollo X, Apollo XVI (71 hours on moon); STS-1, STS-9 |