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Loading contentThe verbs of the graph — the relation types that connect entities, from 'orbits' and 'discovered by' to 'associated with' — and how often each is used. The grammar of the knowledge.
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.