Neil Armstrong became the first person to walk on the moon on July 20, 1969, during the Apollo 11 mission.

The Soviet Union launched Sputnik 1, the first artificial satellite, into orbit on October 4, 1957.

Yuri Gagarin became the first person to orbit the Earth on April 12, 1961, during the Vostok 1 mission.

The Soviet Union sent Yuri Gagarin into space on April 12, 1961, making him the first human in space.

John Glenn became the first American to orbit the Earth on February 20, 1962, during the Mercury-Atlas 6 mission.

The Soviet Union sent Luna 1, the first probe to reach the moon, on January 2, 1959.

Neil Armstrong became the first person to walk on the moon on July 20, 1969, during the Apollo 11 mission.

The Soviet Union sent Mars 2 and Mars 3, the first probes to reach Mars, in 1971.

No human has yet walked on Mars.

The United States sent Pioneer 10, the first probe to reach Jupiter, in 1973.

No human has yet walked on Venus.

The United States sent Pioneer 11, the first probe to reach Saturn, in 1979.

No human has yet walked on Mercury.

The United States sent Voyager 2, the first probe to reach Uranus, in 1986.

No human has yet walked on Neptune.