Vanguard 60th Anniversary: A Look Back

Produced and Edited by James Marshall, Strategic Communications Office

Launched by the U.S. Naval Research Laboratory, March 17, 1958, Test Vehicle 4 (TV4), better known as Vanguard I, was the second satellite launched by the U.S., the first successful satellite of the Vanguard series, and the first satellite to use solar cell power. It is the oldest satellite still orbiting the Earth