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Loading contentBuilds an observing list from the graph's real objects — stars, deep-sky objects, planets — and checks each against the night's visibility. A bridge from the catalogue to the eyepiece.
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.