Are you rocky or are you gassy? Astronomers help unlock the mysteries of super-Earths

An artist’s impression of a stellar system with three super-Earths. Courtesy of ESO. A star about 100 light years away in the Pisces constellation, GJ 9827, hosts what may be one of the most massive and dense super-Earth planets detected to date according to new research led by Carnegie’s Johanna Teske. This new information provides evidence to help astronomers better understand the process by which such planets form. The GJ 9827 star actually hosts a trio of planets, discovered by NASA’s exoplanet-hunting Kepler/K2 mission, and all three are slightly larger…

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