'As long as we can see the sky, we can see our stories': Indigenous Australians first to discover variable stars. Around 2000 years ago. https://www.abc.net.au/news/2019-07-15/indigenous-astronomy-disvoveries-that-preceded-modern-science/11308924

'As long as we can see the sky, we can see our stories': Indigenous Australians first to discover variable stars.

Around 2000 years ago.