When it comes to underdog planets, Ceres might be at the top of the list. Sure, you've probably heard about Pluto's demotion to dwarf planet. But before Pluto, there was Ceres. Ceres also once enjoyed full membership in the solar system's planetary fraternity. When astronomers discovered it in 1801, it was the only object known between Mars and Jupiter. Its story echoes Pluto's. After astronomers found more bodies in similar orbits...
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