In the sky with diamonds? A so-called Super-Earth, planet 55 Cancri e was believed to be the first known planet to consist largely of diamond, due in part to the high carbon-to-oxygen ratio of its host star. (Artist's concept: Haven Giguere/Yale University)
Diamond 'Super-Earth' May Not be Quite as Precious.
A planet 40 light years from our solar system, believed to be the first-ever discovered planet to consist largely of diamond, may in fact be of less exquisite nature, according to new research led by University of Arizona astronomy graduate student Johanna Teske.
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