Science Alert
18 December 2022
Two worlds orbiting a tiny star 218 light-years away appear to be of a kind unlike anything we have in our Solar System.
The exoplanets are named Kepler-138c and Kepler-138d. Both are around 1.5 times the radius of Earth, and both appear to be soggy worlds consisting of thick, steamy atmospheres and insanely deep oceans, all wrapped around a rocky-metallic interior.
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