Soviet Union launches the first artificial satellite, beginning the Space Race. The 58 cm sphere orbited Earth every 96 minutes, transmitting radio signals.
USSR sends the first living creature into orbit - a dog named Laika. This proved that animals could survive launch and weightlessness.
America's first satellite successfully reaches orbit, discovering the Van Allen radiation belts. This marked the US entry into the Space Race.
National Aeronautics and Space Administration officially begins operations. NASA consolidated American space efforts under civilian control.
Soviet cosmonaut Yuri Gagarin completes one orbit of Earth aboard Vostok 1. His 108-minute flight made him the first human in space.
Alan Shepard completes a 15-minute suborbital flight in Freedom 7. Though not orbital, this was America's first crewed spaceflight.
President Kennedy challenges America to land a man on the Moon before 1970. This speech formally committed the US to the Apollo program.
John Glenn becomes the first American to orbit Earth, completing three orbits in Friendship 7. This achievement restored American confidence in the Space Race.
Soviet cosmonaut Valentina Tereshkova orbits Earth 48 times over three days. She remains the only woman to complete a solo space mission.
Soviet cosmonaut Alexei Leonov performs the first extravehicular activity, spending 12 minutes outside Voskhod 2. His spacesuit inflated dangerously during the historic walk.
Ed White becomes the first American to walk in space during Gemini 4. He spent 23 minutes outside the spacecraft using a handheld maneuvering unit.
Soviet probe Venera 3 becomes the first spacecraft to reach another planet's surface. Contact was lost before data transmission, but it marked a historic first.
A cabin fire during a launch rehearsal kills astronauts Gus Grissom, Ed White, and Roger Chaffee. The tragedy led to major Apollo spacecraft redesigns.
First crewed mission to orbit the Moon, with astronauts reading from Genesis on Christmas Eve. This mission tested critical systems for the lunar landing.
Neil Armstrong and Buzz Aldrin become the first humans to walk on the Moon. Armstrong's 'one small step' marked America's victory in the Space Race.
An oxygen tank explosion forces the crew to abort their lunar landing and use the lunar module as a lifeboat. The safe return was hailed as a 'successful failure.'
Soviet Union launches the world's first space station. Though plagued with issues, Salyut 1 pioneered long-duration spaceflight research.
The last Apollo mission to the Moon carries geologist Harrison Schmitt. No human has returned to the lunar surface since.
American and Soviet spacecraft dock in orbit, symbolizing détente between the superpowers. This joint mission marked the end of the Space Race era.