The Space Shuttle < Plus >

40 Years Ago: Space Shuttle Enterprise rolls to the Pad - NASA

: The "workhorse" of the fleet, it flew 39 missions, including the launch of the Hubble Space Telescope. The Space Shuttle

: Built as a replacement for Challenger, it completed 25 missions, including the first service mission for Hubble. 40 Years Ago: Space Shuttle Enterprise rolls to

: A prototype used for atmospheric flight tests; it never flew in space but is currently on display at the Intrepid Sea, Air & Space Museum. How It Worked it flew 39 missions