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 ...

Add Yahoo as a preferred source to see more of our stories on Google. While children dress up as ghosts and goblins for halloween and get their bags and orange plastic pumpkins filled with candy, ...

It is easy to imagine the stars as stable, never changing as the turning Earth sends the constellations across the sky and as we round the sun through the year, the evening's starry offerings shift.

Rising higher as the evening progresses is the constellation Perseus, perhaps most famous for its so-called Demon Star, the variable star Algol. But the Hero hosts many other treasures, including M34, ...

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 ...

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 ...

There are two hero constellations in the celestial theater of the night sky. In the summer and early autumn, we have Hercules the Hero riding high in the heavens. Now that we’re in late fall, ...

Algol makes up one of the "eyes" of Medusa's head that Perseus carries. When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works.

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 ...

There are two hero constellations in the celestial theater of the Pottsville night sky. In the summer and early autumn, we have Hercules the Hero riding high in the heavens. Now that we’re in late ...