The correct answer is Yuri Gagarin.
Gagarin was a Soviet pilot and cosmonaut.
On April 12, 1961, he flew aboard Vostok 1 and completed one orbit around the Earth.
The flight lasted about 108 minutes, and he became the first human to travel into outer space and orbit the planet.
His journey marked a major milestone in the space race between the Soviet Union and the United States.
Gagarin became an international hero, and April 12 is now celebrated as the International Day of Human Space Flight.