The Soviet Union launched Sputnik 1 on October 4, 1957, marking the beginning of the Space Race.

Yuri Gagarin, a Soviet cosmonaut, became the first person to travel into space on April 12, 1961.

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

The United States landed Neil Armstrong and Buzz Aldrin on the moon on July 20, 1969, making them the first humans to walk on the lunar surface.

Neil Armstrong was the first American astronaut to walk on the moon on July 20, 1969.

Apollo 11 was the spacecraft that took Neil Armstrong and Buzz Aldrin to the moon on July 20, 1969.

The Soviet Union launched Mars 2 and Mars 3 into orbit around Mars in 1971, making them the first satellites to orbit the Red Planet.

The Soviet Union sent Venera 3 to Venus in 1966, making it the first spacecraft to reach the planet's surface.

The United States sent Pioneer 10 to Jupiter in 1973, making it the first spacecraft to visit the largest planet in our solar system.

The United States sent Pioneer 11 to Saturn in 1979, making it the first spacecraft to visit the ringed planet.

The United States sent Voyager 2 to Uranus in 1986, making it the first spacecraft to visit the seventh planet from the sun.

The United States sent Voyager 2 to Neptune in 1989, making it the first spacecraft to visit the eighth and farthest planet from the sun.

The United States sent New Horizons to Pluto in 2015, making it the first spacecraft to visit the dwarf planet.

The United States sent Mariner 10 to Mercury in 1974, making it the first spacecraft to visit the closest planet to the sun.

Japan sent Hayabusa to the asteroid Itokawa in 2005, making it the first spacecraft to land on and return samples from an asteroid.