Who is a Russian spaceman a sailor of the universe callEd?

The Russian spaceman known as the "Sailor of the Universe" is Yuri Gagarin. He was the first human to travel into space, orbiting the Earth on April 12, 1961, aboard the Vostok 1 spacecraft. His groundbreaking journey marked a significant achievement in the space race and made him an international hero. Gagarin's legacy continues to inspire generations in the fields of space exploration and science.