Scientist giving a vibration test to the Television Infrared Observation Satellite (TIROS) at the Astro-Electronic Products Division of RCA in Princeton, New Jersey on April 1, 1960. TIROS was NASA's first experimental step to determine if satellites could be useful to study the Earth. NASA celebrates the 50th anniversary of the Space Age marked by the October 4, 1957 launch of Sputnik, the world's first artificial satellite, made by the Soviet Union. (UPI Photo/NASA/FILES)