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Astronomers surprised by discovery of planet twice as big as Earth but 17 times as heavy

Astronomers have discovered a new type of rocky planet beyond the solar system that weighs more than 17 times as much as Earth while being just over twice the size, scientists said on Monday. The so-called “mega-Earth” circles a very old star called Kepler-10, which is located about 560 light-years…

‘Goldilocks’ study shows which planet’s climates are just right for human life

The bad news: Earth’s oceans will evaporate away. The good news: It won’t happen for another billion years or so. Those are the conclusions of a new study into the so-called Goldilocks zone — the distance from a star at which water on a rocky planet can exist as a…