Multiple choice Yuri Gagarin was the ______ man cosmonaut in space. third second first fourth Reveal answer Fill a bubble to check yourself C Correct answer Explanation Yuri Gagarin was indeed the first human to journey into outer space when his Vostok 1 spacecraft completed an orbit of the Earth on 12 April 1961. He was a Soviet cosmonaut and remains one of the most famous figures in space exploration history.