Lauri Jetsu, an astrophysicist at the University of Helsinki, is following a tradition that may stretch back thousands of years. For more than a decade, he’s studied the bright star Algol, one of the ...

The so-called "demon star" of Algol is the most prominent eclipsing variable star in the night sky, and if you know when and where to look, you can see the star appear to wink as it is eclipsed by ...

Dr. Lauri Jetsu from the University of Helsinki has analysed observations of Algol. He argues that Algol has many companion stars which have not been detected from earlier observations. Algol is an ...

While children dress up as ghosts and goblins for halloween and get their bags and orange plastic pumpkins filled with candy, there's a ghoul in the night sky above and it's called Algol, the Demon ...

Don't miss the big stories. Like us on Facebook. It's known as Algol, the Demon Star, and we can see it shining diabolically in our sky each year around Halloween. To find it, go outdoors in the ...

A page of the Cairo Calendar with the hieratic writing for the word 'Horus' in the superimposed rectangle Lauri Jetsu The Ancient Egyptians linked the changes of Algol and the Moon to their deities in ...

According to a legend, more than two centuries ago, a famous Paris astronomer used to stand on one of the Seine bridges on nights when the variable star Algol was in eclipse, to point out this ...

The Ancient Egyptians were meticulous astronomers and recorded the passage of the heavens in extraordinary detail. The goal was to mark the passage of time and to understand the will of the Gods who ...

The Ancient Egyptian papyrus Cairo 86637 calendar is the oldest preserved historical document of naked eye observations of a variable star, the eclipsing binary Algol -- a manifestation of Horus, a ...

Dr. Lauri Jetsu from the University of Helsinki has analysed observations of Algol. He argues that Algol has many companion stars which have not been detected from earlier observations. The results ...