CNN —Astronomers using the Hubble Space Telescope have detected water molecules in the atmosphere of a small, blazing-hot exoplanet 97 light-years from Earth. The planet, named GJ 9827d, is about twice Earth’s diameter, and it’s the smallest exoplanet found to have water vapor in its atmosphere, according to a new study. Starlight filtering through the planet’s atmosphere helped astronomers measure the signature of water molecules. It’s possible that the planet is a mini-Neptune with a hydrogen-rich atmosphere that contains water vapor. Or astronomers suspect that GJ 9827d could be a warmer version of Jupiter’s icy moon Europa, which contains an ocean beneath a thick, icy crust.

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Persons: ”, Laura Kreidberg, Max Planck, Björn Benneke, Hubble, Ian Crossfield, Pierre, Alexis Roy, we’re, ” Benneke, “, GJ, Benneke, Thomas Greene, James Webb, Webb, ” Kreidberg Organizations: CNN —, Hubble, Max, Max Planck Institute, Astronomy, University of Montreal’s Trottier Institute for Research, University of Kansas, University of Montreal’s Trottier Institute, GJ 9827d, NASA’s Ames Research, James Webb Space Telescope, ”, 9827d Locations: Heidelberg, Germany, Lawrence , Kansas, Silicon