Hint: This historic milestone happened on April 12, 1961.

Yuri Gagarin was the first human to travel into space, achieving this historic milestone on April 12, 1961.

A Soviet cosmonaut, Gagarin orbited the Earth aboard the spacecraft Vostok 1, completing one full orbit in approximately 108 minutes.

His successful mission marked a major victory for the Soviet Union in the Space Race and demonstrated the potential for human space exploration. Gagarin became an international hero, symbolizing both technological achievement and the spirit of human exploration. His flight remains one of the most significant events in space history.