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Know the cosmos and our place within it.
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“Exploration is in our nature.” - Carl Sagan

Articles

Stories, updates, insights, and original analysis from The Planetary Society.

Haumea with a ring (artist's rendering)

Meet the Solar System's five official dwarf planets

The International Astronomical Union currently recognizes five dwarf planets: Ceres, Pluto, Haumea, Makemake, and Eris.

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