History changed on October 4, 1957, when the Soviet Union successfully launched Sputnik 1, the world's first artificial satellite. It was around the size of a beach ball, weighed 83.6 kg (183.9 pounds), and took about 98 minutes to orbit Earth on its elliptical path. This ushered in a new age of political, military, technological, and scientific developments, and although the Sputnik launch was a single event, it marked the start of the space age and the U.S.-U.S.S.R space race.
The real thing may have only been the size of a beach ball, but making Sputnik the same height as Yuri Gagarin was too good of an idea to pass up.
Comparative Image by Mike Gruntman, 2004