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Telescope made by Galileo, and spotted the moon.
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Hermann Oberth fired his first liquid rocket engine, the called "Kegeldüse"
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First artificial satellite placed into space that sends back signals to earth launched by the USSR (Union of Soviet Socialist Republics).
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First artificial satellite placed into space that sends back signals to earth launched by the USSR (Union of Soviet Socialist Republics). It was named Sputnik.
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Animal put into orbit, launched by USSR (Union of Soviet Socialist Republics) and didn’t return alive.