See the ‘Demon Star’ Algol wink in the night sky this week

The variable “Demon Star” Algol is located in the Perseus constellation. (Image credit: SkySafari/Simulation Curriculum)

A lovely constellation that straddles the Milky Way is Perseus, the hero, which is visible in the northern skies from July to March. Its stars arc from Capella, in the constellation Auriga, to the “W” of Cassiopeia. But there is one star here that is really quite special. 

According to a legend, late in the 18th century, a famous Parisian astronomer would stand on one of the Seine bridges on nights when the variable star Algol was in eclipse, to point out this remarkable phenomenon to passersby. 

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