7/8" tall. Small die-cut medal finished in gold luster plus enamel accents. Bottom margin has tiny names of astronauts Young and Crippen. Back has needle post and clutch fastener attached to short, fine gold chain terminated by button hole bar.
STS-1 was the first flight of the Space Shuttle program, launched on April 12, 1981, and returning to Earth April 14. Space Shuttle Columbia orbited the earth 37 times in this 54.5-hour mission. It was the first US manned space flight since the Apollo-Soyuz Test Project on July 15, 1975, and the first (and so far only) manned maiden test flight of a new spacecraft system.
All Space Shuttle flights are referenced by their sequential chronological number, prefaced by the acronym "STS", which stands for "Space Transportation System", the official name of the Space Shuttle.