Add Yahoo as a preferred source to see more of our stories on Google. A bright blue star in the night sky. According to a legend, more than two centuries ago, a famous Paris astronomer used to stand ...

These photos contrast the star Algol at normal brightness (left) and when it's eclipsed by a close companion star 2.9 days later. Algol is located in the constellation Perseus, which is shaped liked a ...

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 ...

Lauri Jetsu, an astrophysicist at the University of Helsinki, is following a tradition that may stretch back thousands of years. Subscribe to read this story ad-free Get unlimited access to ad-free ...

Algol in the constellation Perseus is one of the sky's most remarkable stars. It knows how to wink. Which is another way of saying that its light is variable, and the changes are easily visible with ...

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 evening and look low toward the northeast. After it ...

We call it the Demon Star because it winks ominously at us from the sky each evening. Well, OK, it doesn’t “wink,” but it does vary its brightness over time, and for much of history that was quite a ...

In the constellation Perseus the Hero, the star Algol is fun to watch due to its regular changes in brightness. And you don’t even need a telescope. Officially designated Beta Persei, it’s the second ...

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 ...