Well, Einstein said that space is space because it doesn't stay there, as if earth stays in its planetary bounds. In fact, our universe expands very rapidly little by little and day by day until it...
Outer space is known as space due to the vast amount of empty nothingness (Space) it contains. A space is a void with nothing to fill it. That is, no form of mass - neither gas, liquid or solid....
Vostok 1 was the first human spaceflight. The Vostok 3KA spacecraft was launched on April 12, 1961, taking into space Yuri Gagarin, a cosmonaut from the Soviet Union.