It depends on what you are referring to. If you referring to manned space trips, then the answer is 6; Apollo 11, 12, 14, 15, 16 and 17
As long as it is repaired properly, a space shuttle can make trips to and from space forever. They were built for just that purpose. However, they will not do this because NASA is retiring the space shuttles this year (2010).
As of now, NASA has made over 150 manned spaceflights, including missions to the Moon, space stations, and various space shuttle flights. NASA continues to conduct missions to explore outer space, conduct research, and advance scientific knowledge.
none
Many space enthusiest or kids on field trips.
Currently NASA have three space shuttles Discovery, Atlantis and Endeavour.
NASA, the United States National Aeronautics and Space Administration, builds and launches many of the space probes with the cameras.
huston
N.A.S.A has six space stations
As of the end of February 2010, NASA has flown 130 space shuttle flights, two of them ending in catastrophe.
There were a total of six space shuttles in NASA's Space Shuttle program: Columbia, Challenger, Discovery, Atlantis, Endeavour, and Enterprise (which was a prototype and never flew into space).
2
18