discovery+of+planets

Discovery of Planets

Back in the 18th century there were only 6 planets including Earth. Uranus was found on accident. There was a young astronomer who was looking for comets and he found Uranus. After discovering Uranus astronomers noticed Uranus's orbit wasn't normal they predicted there were more planets past Uranus. Neptune discovered by Galle and d'Arrest on 1846 September 23. Pluto was discovered in 1930 on accident. After the discovery of Pluto, they decided it was to small to be considered a planet.

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