The Seven Sisters

In 2021 Ray and Barnaby Norris proposed that 'lost Pleiad' stories share one origin: around 100,000 BC Pleione stood farther from Atlas's glare, showing seven stars.

Ray P. Norris and Barnaby R. M. Norris, 'Why Are There Seven Sisters?', in Advancing Cultural Astronomy (Springer, 2021), 223-235; arXiv:2101.09170 (December 2020)

The Pleiades star cluster in Taurus, called the Seven Sisters though most eyes see six stars.

Sources3 sources

Primary source

Hesiod (trans. Hugh G. Evelyn-White), Works and Days, 1914, 383-384For Hesiod the Pleiades' rising and setting time the harvest and ploughing.
When the Pleiades, daughters of Atlas, are rising, begin your harvest, and your ploughing when they are going to set.

Scholarship

Ray P. Norris and Barnaby R. M. Norris, Why Are There Seven Sisters?, in Advancing Cultural Astronomy, 2021, pp. 223-235 (arXiv:2101.09170, §§1 and 6.1)Proposes that Seven Sisters and lost-Pleiad stories share an origin around 100,000 BC, when Pleione's greater separation from Atlas made seven stars visible.
These strong similarities suggest a common origin

The tradition itself

Margo Neale (ed.), Songlines: Tracking the Seven Sisters, 2017Exhibition book (National Museum of Australia Press, ISBN 9781921953293) with Martu, APY and Ngaanyatjarra accounts of the sisters' flight from Wati Nyiru/Yurla across the Western Desert.