Scientists discover water vapor on an exoplanet with a rocky core
 

Water vapor is common in gas giants; Jupiter, Saturn, Uranus and Neptune all have H2O floating around in their atmospheres. But water on a rocky planet is exceedingly rare, making the discovery of water vapor -- and possibly even rain -- on the exopl...

https://www.engadget.com/2019/09/11/...et-rocky-core/