but also on a series of rockets dating back to the early days of the space race. Delta II is the ultimate evolution of the US Air Force’s Thor missile, which first flew in 1957 and stood watch ...

A Thor-Delta rocket combination will launch OSO II in the summer of 1963. According to the scientists' plans, as the OSO II circles the earth, it will collect date on the sun and radio it to a ...

The telecommunications company AT&T launched the world’s first commercial communications satellite, on top of a Thor-Delta rocket. It went “live” on the night of July 10, and provided its ...