'Craft aboard which U.S. astronauts spent the longest time in space, about 2000 hours'
Skylab
MAN IN SPACE: Craft aboard which U.S. astronauts spent the longest time in space, about 2000 hours
Craft aboard which U.S. astronauts spent the longest time in space, about 2000 hours
Craft aboard which U.S. astronauts spent the longest time in space, about 2000 hours
MAN IN SPACE
Skylab
MAN IN SPACE