Stock Photo - The three members of the Skylab 4 crew undergo spacesuit fit and pressure checks in the suiting building during preflight activity at the Kennedy Space Center, Florida. They are astronaut Gerald P. Carr (foreground), commander; scientist-astronaut Edward G. Gibson (center), science pilot; and astronaut William R. Pogue (background), pilot. Skylab 4, the third and last visit to the Skylab space station in Earth orbit, will return additional information on the Earth and sun, as well as provide a favorable location from which to observe the recently discovered Comet Kohoutek.