Scientists discover rocky planet with possible atmosphere and oceans

The planet LHS 1140b is located 49 light-years from Earth in the system of the red dwarf LHS 1140 in the constellation Cetus. It continuously emits helium, indicating that other volatile substances are retained at lower altitudes, consistent with atmospheric structure models, according to a publication in Science. Scientists believe that if atmospheric gases create a greenhouse effect, there could be a warm ocean on the surface suitable for swimming.