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Hubble spots liquid water on a 'super-Earth' 110 light-years away

Devin Coldewey
Hubble spots liquid water on a 'super-Earth' 110 light-years away

Water is not uncommon to find in our galaxy in ice or gaseous form, but liquid water is quite rare — and liquid and gaseous water on an Earth-like exoplanet? Astronomers spotted this celestial unicorn, called K2-18 b, using the venerable Hubble space telescope. K2-18 b is a "super-Earth," a planet with a mass and size approximately like our own.