Newslink: TRAPPIST-1 Planets Could Harbor 250 Times More Water Than Earth's Oceans
The seven TRAPPIST-1 exoplanets are "tugging" on each other as they travel around their parent star, scientists have observed. Scientists also found that some TRAPPIST-1 worlds could have 250 times more water than Earth's oceans.
https://www.space.com/39621-trappist-worlds-tug-at-each-other.html
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