In the atmosphere of an exoplanet just 111 light-years away, astronomers have just made a highly exciting discovery: they’ve detected water.
As much as 50 percent of the atmosphere of K2-18b could be water vapour. But unlike other giant exoplanets on which atmospheric water has been detected, K2-18b is a super-Earth. It could be rocky, like Earth, Mars and Venus.
Not only could this discovery help us to understand the atmospheres of habitable zone exoplanets in general, but those of habitable zone rocky exoplanets in close orbit around red dwarf stars. Read more