Water discovered on ‘habitable zone’ exoplanet could actually be methane, new study finds
Evidence of water vapour in the atmosphere of an exoplanet caused widespread excitement in 2019, signalling the first discovery of a key element for life on a planet in a “habitable zone” outside of our solar system. A new study, however, suggests that vapour found on the planet named K2-18b may not be the life-supporting…