Who was the first Astronaut of the world?

Maj. Yuri Gagarin made his first space flight on April 12, 1969. Yuri Gagarin was the first human to journey into outer space. He was a Soviet cosmonaut, who on 12 April 1961, was launched on the manned spaceflight Vostok 1. During this spaceflight he orbited the Earth once in a Vostok spacecraft and then landed unharmed.