Reading the birth of Uranus moons in water

Uranus has a family of icy moons, and how they formed is still debated. Scientists measured a special kind of water called deuterated water. The amount of it acts like a fingerprint for where and how the moons formed. Their reading points to the conditions in the cold outer solar system long ago. It is a small clue that helps place the birth of the moons in time and space. The study is a new paper, adding a piece to a long puzzle.

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