Question

sputnik was the first unmanned satellite launched into orbit in 1957. during which decade were manned satellites first sent into orbit? 1970s 1960s 1950s 1940s

Explanation:

The first manned space - flight with a human in orbit was Yuri Gagarin's Vostok 1 mission in 1961, which was in the 1960s.

Answer:

B. 1960s