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Galileo did not actually event the telescope, only improved upon it. Although, he was using the improved telescope to greatly add to the world's knowledge of our Solar System.
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Launched in Earths low orbit by the Soviet Union. It was the first satelite and the first thing that left Earth.
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First American earth orbiter, It discovered the Van Allen radiation belts.
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Luna was the first Lunar flyby launched by the Soviet Union.
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This was the first manned Earth orbiter launched b none other than the Soviet Union.
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First Mars flyby
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First lunar orbiter
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First Venus atmospheric probe
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First man on the moon, launched and succeeded by the United States.
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first landing on Venus, attempted by the Soviet Union.
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First robotic lunar sample return
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First lunar rover
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Salyut was the first space station made by the Soviet Union.
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Mars orbiter, First Mars lander (lost contact after 14.5s) and First Mars atmospheric probe
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First Jupiter flyby
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Jupiter flyby and First Saturn flyby.
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Venus flyby and First Mercury flyby
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First Venus orbiter and lander; First images from surface of Venus
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Mars orbiter and lander; First lander returning data and First pictures from Martian surface.
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Solar observations, Closest solar approach (0.29 AU)
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Jupiter/Saturn/first Uranus/first Neptune flyby
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Jupiter/Saturn flyby, Furthest human-made object.
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Solar wind investigations; later redesignated International Cometary Explorer and performed Comet Giacobini-Zinner and Comet Halley flybys – First comet flyby
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It was a space telescope that was put in space by a space shuttle.
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an American space transport company headquartered in Hawthorne, California.
