How water was detected on a potentially habitable exoplanet for the first time

By Angelos Tsiaras
Updated September 12 2019 - 11:23am, first published 11:19am

With more than 4,000 exoplanets - planets orbiting stars other than our sun - discovered so far, it may seem like we are on the cusp of finding out whether we are alone in the universe. Sadly though, we don't know much about these planets - in most cases just their mass and their radius.

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