Artist’s depiction of a water world. Image: NASA/JPL-Caltech
While the surface of the Earth is more than 70% covered by ocean, worlds covered by even greater expanses of water may be more common than previously thought. We have previously posted about evidence of water on other bodies in our solar system. It is likely that there is water on Mars and Jupiter’s largest moon, Ganymede, may have vast underground oceans. Likewise the dwarf planet Ceres may contain more water than our planet Earth. Now, recent computer models suggest that most habitable planets may be “water worlds.”
Gizmodo reports that “a new study published in The Monthly Notices of the Royal Astronomical Society suggests that most habitable planets are wet. Like, extremely wet. Using computer models, astronomer Fergus Simpson from the Institute of Cosmos Science at the University of Barcelona found that habitable exoplanets, at least simulated ones, tend to be overrun by water, in most cases accounting for 90 percent or more of the total surface area.”
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