Sputnik 1, the first man-made object to orbit Earth, is launched by the USSR.
Explorer 1 is the first U.S satellite to orbit Earth.
Volstok 1 is launched by the USSR carrying Cosmonaut Yuri Gargarin.
Project Mercury carries Alan Shepard into space as the first U.S. astronaut.
John Glenn is the first U.S. astronaut to orbit Earth
Project Gemini launches the first U.S. two-man crew into space.
Apollo 8 leaves Earth's orbit and circles the Moon.
Apollo 11 lands on the Moon. Astronauts Neil Armstrong and Edwin "Buzz" Aldrin walk on the moon.
Project Skylab is launched by the U.S.
Viking 2, launched by the U.S. lands on Mars.
First mission of the U.S. Space Shuttle
The Hubble SPace Telescope is launched
First evidence of a planet outside the solar system is obtained.
Pathfinder lands on Mars. Colar images of the surface and data on the rocks and soil are collected.
Construction begins on the International Space Station