Ask any astronomer to name the most famous variable star in the sky and many will say Algol, the eclipsing binary in Perseus whose variations were first reported in 1670 by the Italian astronomer Geminiano Montanari. Algol is clearly visible in the evening at this time of year, dropping to one-third of its usual brightness every 2.87 days for 10
Algol: the demonised star
Dec 14, 2023
2 minutes
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