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 ...

In this artist's view, the larger, cooler star in the Algol pair deeply eclipses the smaller, brighter star every 2.9 days. We can easily see the eclipse as a dramatic change in Algol's brightness.

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.

There’s a demon in the early-morning sky, amid the stars of Perseus the Hero. Second-magnitude Algol (Beta Persei) is also famously known as the Demon Star, and you can spot it two hours before ...

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 ...

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 ...

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 ...

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. Breaking space news, the ...