| Used for atmospheric test flights. Never flew in space. Named after the ship in [[Star Trek (original series)|Star Trek]].<ref>[http://www.nasa.gov/vision/earth/everydaylife/nasm_enterprise.html Shuttle Enterprise at Center of Museum's Space Hangar]</ref>
|-
|-
| Pathfinder
| Pathfinder
Line 36:
Line 38:
| No flights made.
| No flights made.
| No flights made.
| No flights made.
+
| Not an operational shuttle, but a full-sized mock-up used for various tests.<ref>[http://science.ksc.nasa.gov/shuttle/resources/orbiters/pathfinder.html Pathfinder]</ref>
|-
|-
| [[Space Shuttle Columbia|Columbia]]
| [[Space Shuttle Columbia|Columbia]]
Line 42:
Line 45:
| April 12th, 1981
| April 12th, 1981
| February 1st, 2003
| February 1st, 2003
+
|
|-
|-
| [[Space Shuttle Challenger|Challenger]]
| [[Space Shuttle Challenger|Challenger]]
Line 48:
Line 52:
| April 4th, 1983
| April 4th, 1983
| January 28th, 1986
| January 28th, 1986
+
| Originally built for Earth-bound tests, but later converted for space flight.<ref>[http://www.nasa.gov/centers/kennedy/shuttleoperations/orbiters/challenger-info.html Space Shuttle Overview: Challenger (OV-099)]</ref>