On September 23, 1846, German astronomer Johann Gottfried Galle discovered the planet Neptune, the eighth planet in our solar system. To celebrate this landmark event in astronomical history, here are five things Trivia Today tells us about the planet Neptune...
The Discovery of Neptune is still a Controversy
The first person to have seen Neptune was likely Galileo, who marked it as a star in one of his drawings. However, since he did not identify it as a planet, he is not credited with the discovery. That credit goes to French mathematician Urbain Le Verrier and the English mathematician John Couch Adams, both of whom predicted that a new planet – known as Planet X – would be discovered in a specific region of the sky. When astronomer Johann Gottfried Galle actually found the planet in 1846, both mathematicians took credit for the discovery.
Neptune is the Coldest Planet in the Solar System
The temperatures on Neptune can dip down to -221.45 degrees Celsius (-366.6 °F). That’s almost three times the coldest temperature ever recorded on Earth (-89.2°C; -129°F), which means that an unprotected human being would flash freeze in a second!
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