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When was the Tunhuang manuscript made?

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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 Tunhuang manuscript, which is considered the oldest existing portable star map from any civilization (excluding astrolabes), dates from approximately 940 ce.1