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The Story of How Pluto Was Discovered 95 Years AgoEveryone's favorite dwarf planet, Pluto, was discovered just 95 years ago. Here's the story of how the once-ninth planet was ...
Astronomers finally spotted evidence of auroras on Neptune after years of searching, raising new questions about the planet.
Ganymede, Jupiter's largest moon and the solar system's largest, is bigger than Mercury and the dwarf planet Pluto, with a diameter of 5,268 kilometers.
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