The first man-made satellite , Sputnik -I was launched by the former USSR in -
A
1957
B
1955
C
1970
D
1967
Correct Answer: 1957
In October 1957, the Soviet Union launched Sputnik 1, the world's first artificial satellite. The 184 - pound 22.5 - inch sphere orbited the earth once every 96 minutes. Sputnik transmitted radio signals for 21 days and later burned up in the earth's atmosphere.