British scientists say they have found water for the first time in the atmosphere of a planet outside our solar system.
Researchers at University College London said Wednesday they found water vapor in a planet's air 110 light years from Earth that has temperatures suitable for life as we know it.
More than 4,000 exoplanets have been detected, but scientists say it is the only known exoplanet that has water, temperatures needed for life and a rocky surface.
It is not known if the planet, twice the size of Earth, eight times its mass, has water flowing on its surface.