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Ancient Egyptians discovered Algol's variability 3,000 years before western astronomers

Trending story found on phys.org
Ancient Egyptians discovered Algol's variability 3,000 years before western astronomers
An ancient Egyptian papyrus, known as the Cairo Calendar, could be the oldest historical record of a star's brightness, providing a new perspective on the development of the Algol triple star system over thousands of years.
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