Sapphires and rubies in the sky

Wednesday, December 19, 2018 - 14:10 in Astronomy & Space

Twenty-one light years away from us in the constellation Cassiopeia, a planet orbits its star with a year that is just three days long. Its name is HD219134 b. With a mass almost five times that of Earth it is a so-called “super-Earth”. Unlike the Earth however, it most likely does not have a massive […]

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