K2-18b is a sub-Neptune with water vapour, methane, and possibly DMS in its atmosphere. It’s 124 light-years away, in the habitable zone of a red dwarf star. It might be a water world, a mini ...

Could alien life thrive on K2-18b? ... .6 times that of Earth – means that the planet’s interior likely contains a large mantle of high-pressure ice, like Neptune, according to astronomers.

Scientists using The James Webb Space Telescope have uncovered potentially earth-shattering evidence indicating a faraway world could be home to alien life. A team at the University of Cambridge ...

But, the team calculated, it's slightly more likely that a rogue, Neptune-like planet from another solar system was snagged by the sun's gravity and came to rest somewhere in the Oort cloud.

Unlike the James Webb Space Telescope's views of other sub-Neptune exoplanets' atmospheres, its look at TOI-421 b was clear. Credit: NASA / ESA / CSA / Dani Player illustration A sweltering planet ...

With the possibility of a mini-Neptune being mostly ruled out (though further observations and analysis will be needed to confirm this), Cadieux’s team turned to another possibility: a super-Earth.