A super-Earth named GJ 1214 b is believed to be made entirely out of water: a water mantle over a water core. Another, named PSR J1719-1438 b, is believed to be made entirely out of crystal diamond.
The planet, GJ 1214 b, is located a mere 48 light-years away from Earth in the constellation Ophiuchus and has become a focal point for groundbreaking research. Unlike anything found in our solar ...
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