| 100% | COLUMBIA | 8 | NASA's first space-rated Space Shuttle orbiter constructed by Rockwell International |
| 87% | ENTERPRISE | 10 | NASA's first Space Shuttle orbiter constructed by Rockwell International |
| 76% | CHALLENGER | 10 | NASA's second Space Shuttle orbiter constructed by Rockwell International |
| 76% | ATLANTIS | 8 | NASA's fourth Space Shuttle orbiter constructed by Rockwell International |
| 35% | DISCOVERY | 9 | First shuttle to be retired by NASA |
| 34% | ENDEAVOUR | 9 | NASA Space Shuttle aka OV-105 whose first mission was in May, 1992 |
| 34% | ENDEAVOUR | 9 | NASA Space Shuttle aka OV-105 whose first mission was in May 1992 |
| 31% | NEIL | 4 | Armstrong, NASA's first civilian astronaut to fly in space |
| 29% | CHALLENGER | 10 | NASA's space shuttle that broke apart 73 seconds after take off in 1986 |
| 29% | EILEEN | 6 | First woman Space Shuttle pilot Collins |
| 29% | ALANSHEPARD | 11 | First American to travel into space during NASA's 1961 Freedom 7 mission |
| 29% | DISCOVERY | 9 | First operational space shuttle to be retired |
| 28% | DISCOVERY | 9 | NASA space shuttle in service from 1984-2011 |
| 28% | ULF | 3 | First German Space Shuttle payload specialist, ___ Merbold ('83) |
| 28% | EILEEN | 6 | ___ Collins, first female space shuttle commander |
| 28% | SHUTTLE | 7 | Space __; spacecraft system operated by NASA |
| 27% | EILEEN | 6 | Astronaut Collins, first female Space Shuttle commander |
| 27% | MIR | 3 | Site visited by the first space tourist |
| 27% | EILEEN | 6 | ___ Collins, first woman to command a space shuttle |
| 27% | COLLINS | 7 | Eileen, first woman to command a space shuttle |
| 27% | COLUMBIA | 8 | Name of the first space shuttle, launched 1981 |
| 27% | CHALLENGER | 10 | Space Shuttle —, orbiter that exploded 73 seconds after lift-off in January, 1986 |
| 27% | CHALLENGER | 10 | Space Shuttle —, orbiter that exploded 73 seconds after lift-off in January 1986 |
| 26% | EILEEN | 6 | Collins who was the first woman Space Shuttle commander |
| 26% | EROS | 4 | First asteroid orbited by a NASA spacecraft |
| 26% | MISSION | 7 | NASA's is space exploration |
| 26% | EILEENCOLLINS | 13 | First female commander of a space shuttle, Columbia in 1999: 2 wds. |
| 26% | EROS | 4 | First asteroid landed on by a NASA craft |
| 26% | ENDEAVOUR | 9 | Final operational shuttle built by NASA |
| 26% | ORBIT | 5 | Space shuttle's path |