Sign up for CNN's Wonder Theory science newsletter.Explore the universe with news on fascinating discoveries, scientific advancements and more.The exoplanet 55 Cancri e goes by several names, but the rocky world located 40 light-years from Earth is most known for its reputation as a hell planet.This super-Earth, so named because it's a rocky planet eight times as massive and twice as wide as Earth, is so scorching hot that it has a molten lava ocean for a surface that reaches 3,600 degrees Fahrenheit (1,982 degrees Celsius).
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