There's a Super-Earth Planet Made Mostly of Diamonds

Located about 40 light-years away, 55 Cancri e is an exoplanet thought to have a significant portion of its mass as diamond due to its carbon-rich composition and extreme pressures and temperatures. Its surface is likely covered in graphite and diamond.

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https://www.nasa.gov/feature/goddard/diamond-planet-crab-nebula-pulsar-planet-55-cancri-e

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Published: March 27, 2026
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Space Astronomy Weird Science Planets Diamonds Exoplanet 55 Cancri E

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