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The first instances of the Geocentric model being used in Ancient Greece
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The idea of the Heliocentric model is first referred to by Nicolaus Copernicus
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The Sextant was first invented, an ancient tool that navigated by the stars
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Russians launch the first artificial satellite, Sputnik 1
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The dog Laika goes into space, making it the first living thing ever to do so
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Russian Probe Luna 3 sends first pictures of the far side of the moon.
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Valentina Tereshkova is the first woman in space
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Neil Armstrong is the first man to ever step on the moon
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The spaceship Challenger explodes at launch, killing 7 astronauts
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Discovery launches the Hubble Telescope into Space
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The ISS is launched
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The Mars Orbiter disappears after orbiting Mars
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Dennis Tito is the first tourist in space
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Twin Mars Exploration Rover Missions Spirit and Opportunity land on Mars
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The planet HD 106906b or the Distant Monster is discovered. This planet has confused many of the cleverest space scientists alive today
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Water flow patterns are discovered on mars, indicating that there might be water on mars after all.
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Hubble's Partner, and eventually replacement, the James Webb Space Telescope is going to be launched