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Loading contentA free, open-source sky-charting program (also known as SkyChart) that draws detailed star charts from a choice of catalogues for any time and place, with strong support for telescope control and finder charts. It is a long-standing favourite for planning deep-sky observing.
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.