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Britannica Sources used in this answer

How many stars are plotted in the Tirion Sky Atlas 2000.0?

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Star trails over banksia trees, in Gippsland, Vic., Austl. The south celestial pole, located in the constellation Octans, is at the centre of the trails.
Astronomical map Star trails over banksia trees, in Gippsland, Vic., Austl. The south celestial pole, located in the constellation Octans, is at the centre of the trails.

The Tirion Sky Atlas 2000.0 (1981) plots approximately 43,000 stars down to magnitude eight.1

This atlas, which is based primarily on the SAO Star Catalog, consists of 26 charts and also includes information on the boundaries of the Milky Way and about 2,500 nonstellar objects, such as star clusters, nebulas, and galaxies.1