This colorful image of the Helix nebula may mirror what someday could become of our sun and our home planet. Released on ...
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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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 discovered. In the early 20th century, the businessman, astronomer, and ...
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