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Jessica Story's List: Astronomy
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For all its similarity to our own globe, though, it is still a far cry away from a habitable Earth-twin. For one thing, it is so hot — between 1,830 and 2,730 degrees Fahrenheit — that scientists think it might be covered in lava.
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Terrestrial planets are so hard to find because they are small, and their low mass makes it tough to detect their gravitational pull on parent stars (a common way of discovering exoplanets).
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