via www.gizmag.com
An international research team led by the Swinburne University of Technology, identified a pulsar star (PSR J1719-1438) with a hidden planet. This small planet is much denser than any other planet and consists largely of carbon. Because of its density, scientists speculate the carbon must be crystalline. Effectively meaning a large part of the planet is diamond.
The planet is estimated to be the remains of a massive star that has lost its outer layers to the pulsar star it orbits (PSR J1719-1438), leaving behind the crystallized core.
The planet is located about 4,000 light years away in the constellation Serpens.
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