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What is a Planet? - NASA Science

Planets - NASA Science

Planets, ranked

What's the largest planet in the Universe? - BBC Science Focus Magazine

If another planet existed that was precisely our size and in our exact orbit, but placed behind the Sun, would we have the means to detect its existence?

Deep Space Spotlight: The Dwarf Planets of our Solar System - Lowell Observatory

Astronomers find seven planets being 'fried' by their star

Exoplanet Exploration: Planets Beyond our Solar System

The planet that could end life on Earth

Planets of the Solar System Planet Facts, Dwarf Planets, Size