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.

WASHINGTON, June 25 (Reuters) - In addition to providing a trove of information about the early universe, the James Webb ...

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.