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 ...

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.

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 ...

December brings the longest nights of the year, and with them some fine celestial sights. Far from the neighborhoods’ holiday and street lights, nebulae, star clusters and distant galaxies cross the ...

When examining clusters of galaxies, astronomers often find massive elliptical galaxies lurking at the centers. In some of these, long filaments of gas and dust extend outwards from the core. One of ...

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 ...