Explanation:

On 12^th April 1961, the first human space flight was carried out by Yuri Gagarin, a citizen of the Soviet Union. On the Vostok 1 mission, he completed one orbit around the planet for over 108 minutes. The spacecraft on which he orbited around the planet was named Vostok 3KA and it was launched on a rocket named Vostok-K. The launch took place from the Baikonur Cosmodrome in Kazakhstan, USSR.