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Image shows super-Earth Kepler-138 d in the foreground, undated photo. Astronomers from the University of Montreal, in Quebec, Canada, found out that two exoplanets may be mostly water. (NASA, ESA, Leah Hustak (STScI)/Newsflash)
Hubble Researchers Find Twin Super-Earth Planets With 1,000-Mile-Deep Oceans
An international team of researchers using the Hubble telescope has found that two Earth-like planets may be largely made of water and covered in oceans 1,000 miles deep. The planets,…