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Water vapor discovered in the atmosphere of the exoplanet K2-18b

Exoplanet K2-18b, discovered in 2015 with Kepler telescope, is twice as big as Earth - but 9 times more massive. It orbits its star in habitable zone and apparently has water in its atmosphere. It is the smallest exoplanet with detected water vapor in the habitable zone of a star.

Exoplanet Kepler 20f

Related stars in our catalogue
part of star image
part of star image
K2-18 111 ly
2 exoplanet
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