the period in modern history characterized by space exploration, usually considered as beginning October 4, 1957, when the Soviet Union launched the first artificial satellite, Sputnik I, into orbit around the earth.
Also, space age.
[speys-eyj] /ˈspeɪsˌeɪdʒ/ Show IPA
pertaining to or characteristic of the Space Age.
using the latest or most advanced technology or design.