CoRoT-7b is another of the extrasolar planets that resemble Earth. It revolves around a star very similar to the Sun located in the constellation of Monoceros, also known as the Unicorn. It takes 20.4 hours to complete a circle around its star, which is 480 light years away. Astronomers have calculated that the star is about 1.5 billion years old, almost a third of the age of the Sun.
Unlike other large exoplanets, CoRoT-7b is much smaller and similar to Earth. Even so, its size is 70 percent larger than that of the Earth, and its mass 4.8 times that of our planet. It is almost certain that CoRoT-7b is made of rock materials.
CoRoT-7b is 60 times closer to its star than the Earth of the Sun. As can be seen in the simulated image, it could originate as a gas giant. Currently, the exoplanet undergoes extreme warming that can reach 2,000 degrees Celsius on the daytime side. That is why the rocky surface that is directly exposed to the irradiation of the star is melted. Therefore, the exoplanet can only retain a faint atmosphere, composed almost exclusively of vaporized rock.
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