A planet that is about twice the size of Earth has been found orbiting a nearby star in the constellation Cancer. This planet is much too hot for humans to ever live on. But the heat is very good for something else–creating diamonds! The planet is very rich in carbon, which is what diamonds are made of. The illustration above shows the planet with a layer of diamonds under its graphite surface.

Read more about the diamond planet on National Geographic News.

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Illustration courtesy Haven Giguere, Yale