Eight newfound alien planets appear to orbit in their parent stars' habitable zone -- that just-right range of distances that may allow liquid water to exist on a world's surface -- and all of them are relatively small, researchers said.
Eight newfound alien planets appear to orbit in their parent stars' habitable zone -- that just-right range of distances that may allow liquid water to exist on a world's surface -- and all of them are relatively small, researchers said.
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