World’s Strangest

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GJ 1214b, the Earthlike Exoplanet

Astronomers are identifying more and more exoplanets, planets that exist in other star systems besides ours. Of the hundreds of exoplanets we know of, the one that most resembles earth is called GJ 1214b. It can be studied because it is only 42 light years away. Based on its radius and mass — about 2.7 and [...]