Its maiden voyage was on August 30, 1984. Since then it has flown more than any other Spacecraft having completed 39 successful missions one of which was the launching of the Hubble Space Telescope. Discovery now resides at the Smithsonian Museum in Washington, DC.
The First Space Shuttle built was the Enterprise. It was built by Rockwell International to be used by NASA for test flights in the atmosphere. The Enterprise had been designed so it could be refitted and used for orbital flight. However, this plan proved too expensive and so it was decided to simply build a new shuttle called Challenger. The Enterprise now resides in the Intrepid Museum in New York City.
Kepler is a space observatory launched by NASA to discover Earth-size planets orbiting other stars. Named after astronomer Johannes Kepler, the spacecraft was launched on March 7, 2009, into an Earth-trailing heliocentric orbit.