Assuming you meant the 'Columbus' of the space age... It's because Gagarin was the first person to travel into space - just as Columbus was the first explorer to discover america.
Yuri Gagarin
Yuri Gagarin was the first human in space.
Yuri Gagarin was launched into space on 12/8/1961.
Vostok 1
Yuri Gagarin! :3
Yuri Gagarin
No. Yuri Gagarin was the first man in space.
how far away from the earth did yuri gagarin travel?
Yuri Gagarin launched on a Soyuz spaceship
Yuri Gagarin flew in space in the Russian spacecraft Sputnik on April 11 1961.
Yuri Gagarin became the first human to travel to space on the 12th of April 1961.
Major Yuri Gagarin was a Russian cosmonaut , he was the first man in space.