[#]ThisDayInScience #Science
1860: The discovery of the planet Vulcan is announced at a meeting of the French Academy of Sciences
https://en.wikipedia.org/wiki/Vulcan%20(hypothetical%20planet)
1959: Luna 1, the first spacecraft to reach the vicinity of the Moon and to orbit the Sun, is launched by the Soviet Union
https://en.wikipedia.org/wiki/Luna%201
2004: Stardust successfully flies past Comet Wild 2, collecting samples that are returned to Earth
https://en.wikipedia.org/wiki/Stardust%20(spacecraft)
https://en.wikipedia.org/wiki/81P/Wild
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