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Aboard Vostok 1, Soviet cosmonaut Yuri Gagarin performed the first human spaceflight, completing one orbit of Earth in 108 minutes.

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Vostok 1
First human spaceflight in history
Vostok 1 was the first spaceflight of the Vostok programme and the first human orbital spaceflight in history. The Vostok 3KA space capsule was launched from Baikonur Cosmodrome on 12 April 1961, with Soviet cosmonaut Yuri Gagarin aboard, making him the first human to reach…Source: Wikipedia (CC BY-SA)
Astronaut
Spacecraft crew member
An astronaut is a person trained, equipped, and deployed by a human spaceflight program to serve as a commander or crew member of a spacecraft. Although generally reserved for professional space travelers, the term is sometimes applied to anyone who travels into space, including…Source: Wikipedia (CC BY-SA)
Yuri Gagarin
Soviet cosmonaut (1934–1968)
Yuri Alekseyevich Gagarin was a Soviet pilot and cosmonaut who, aboard the first successful crewed spaceflight, became the first person to journey into outer space. Travelling on Vostok 1, Gagarin completed one orbit of Earth on 12 April 1961, with his flight taking 108 minutes.…Source: Wikipedia (CC BY-SA)
Human spaceflight
Spaceflight with a crew or passengers
Human spaceflight is spaceflight with a crew or passengers aboard a spacecraft, often with the spacecraft being operated directly by the onboard human crew. Spacecraft can also be remotely operated from ground stations on Earth, or autonomously, without any direct human…Source: Wikipedia (CC BY-SA)