On this day in 1974 - May 17th - the first geostationary satellite was launched.

SMS-1 (Synchronous Meteorological Satellite) was the first satellite in the first series of geostationary meteorological satellites. (A geostationary satellite is in an orbit that keeps it above the same part of the Earth all of the time.)

Mona Evans
For news, activities, pictures and more, sign up to the Astronomy Newsletter!