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CoRoT-7b
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CoRoT-7b

extrasolar planet
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Written by
Erik Gregersen
Erik Gregersen is a senior editor at Encyclopaedia Britannica, specializing in the physical sciences and technology. Before joining Britannica in 2007, he worked at the University of Chicago Press on the...
Erik Gregersen
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CoRoT-7b, the first extrasolar planet that was shown to be a rocky planet like Earth. CoRoT-7b orbits a main-sequence star, CoRoT-7, of spectral type K0 (an orange star, cooler than the Sun) that is about 500 light-years from Earth. CoRoT-7 was discovered in 2009 by the French satellite CoRoT (Convection, Rotation and Planetary Transits), when it passed in front of its star. CoRoT-7b orbits its star every 0.85 day at a distance of 2.6 million km (1.6 million miles). It is so close to its star that its surface temperature is about 2,000 °C (3,600 °F). CoRoT-7b’s radius was determined ...(100 of 243 words)

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