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Copernicus publishes his most scientificaly impressive work, De revolutionibus orbium coelestium, which theorized that the Earth went around the sun.
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Hans Lippershey is credited with inventing the earliest form of the telescope.
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Galileo Galilei discovers the four moons of Jupiter.
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Astronomer Edmond Halley has a famous comet named after him.
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The tenth most massive object orbiting our sun, formerly an official planet, is named Pluto.
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Sputnik 1 is launched in the Soviet Union, becoming the first artificial Earth satellite.
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Neil Armstrong become the first men to step foot on the moon.
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Voyager 1 is launched to explore outside our solar system.
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Voyager 1 takes a photo of the Earth from the far reaches of our solar system, giving mankind a humbling perspective on our position among the stars.
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NASA launches the Curiosity rover to explore the surface of Mars