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Loading contentOne of the most abundant molecules in the universe, present as gas, as ice frozen onto dust grains, and in the disks where planets form. Tracing where water is inherited from the interstellar medium versus made in disks is central to understanding how worlds get their oceans.
Facts on this topic will be cited from these primary and reference sources.
Mission data, planetary science, space telescopes, and public-domain imagery.
Most NASA-produced imagery is in the public domain; individual items are checked for usage terms before publication.