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Russians launch the first official satellite, Spuntink 1
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A dog named Laika becomes the first living creature sent from Earth into space, aboard Russia's Sputnik 2
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Launch of the first US satellite, Explorer 1
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Russian probe Luna 3 sends first pictures of the far side of the moon.
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NASA launch a chimpanzee named Ham into space aboard a Mercury rocket.
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Russian Yuri Gagarin becomes the first person in space in a 108-minute flight in Vostok 1.
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First American in space (Alan Shephard).
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First Astronaut to orbit the Earth (John Glenn, USA)
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NASA's Mariner 2 scans the surface of Venus.
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Soviet cosmonaut Alexei Leonov makes the first space walk.
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Soviet cosmonaut Valentina Tereshkova becomes the first woman in space, aboard Vostok 6.
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Mmariner 4 flies by Mars.
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First Moon landing (by Soviet spacecraft Luna 9)
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A fire on the launch pad of Apollo 1 kills 3 US astronauts.
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The first death in space (Soviet cosmonaut Vladimir Komorok)
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Soviet craft Venera 4 lands on Venus.
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First crewed spacecraft to orbit the moon (Apollo 8)
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US astronaut Neil Armstrong becomes first person to walk on the moon.
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Russian rover the first vehicle to drive on the moon.
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Launch of the first space station 9the Soviet Salyut 1)
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First space probe to fly-by Jupiter (Pioneer 10)
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First space probe to fly-by Mercury (Mariner 10)
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First US and Soviet spacecraft docking (Apollo/Soyuz)
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First successful landing on Mars (by space probe Viking 1)
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First Saturn fly-by (Pionner 11)
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First space shuttle launch (Columbia)
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First Uranus fly-by (Voyager 2)
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Space shuttle Challenger explodes during launch, killing all seven crew.
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Launch of Russian space station Mir.
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First fly-by of Halley's comet (by European space probe Giotto)
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First Neptune fly-by (Voyager 2)
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Space shuttle Discovery launches the Hubble Space Telescope (HST).
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The first part of the International Space Station (ISS) is launched
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Mars Climate Orbiter disappears after orbiting Mars.
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Mars Polar Lander dissapears, creating further embarrassment for NASA
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Mir space station abandoned and crashes of the coast of Australia in the Pacific Ocean.
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First tourist in space, Dennis Tito.
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Twin Mars Lander missions 'spirit' and opportunity' land on Mars
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Space Shuttle Columbia explodes on re-entry, killing all seven astronauts.
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The Nobel Prize for Physics was awarded to the Ligo team that has now spotted three instances of gravitational waves coming from black holes merging.
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An exoplanet discovered 40 light years away caused excitement among astronomers in April, as it has the potential to give us the best opportunity ever to find alien life. The 'super-Earth' called LHS 1140b is around 1.4 times the size of our planet but seven times its mass. It is rocky, temperate and orbits a quiet star in our galactic neighbourhood.
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In October, a merger was detected – but this time from two neutron stars. Not only this, but the team also found electromagnetic radiation coming from the event and gamma-ray bursts given off just seconds later.