When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. It's looking less likely that a swarm of comets or an "alien megastructure" can explain a faraway ...

There’s another oddly flickering star in the galaxy. Astronomers using a telescope in Chile have discovered a star whose strange dimming and brightening of light are reminiscent of Tabby’s star, which ...

The week will start off with a planetary alignment. Mercury will reach what’s known as “superior conjunction” on Sunday at 5:00 P.M. That is when Earth, the sun and Mercury will line up in that order.

The "music" of starquakes—enormous vibrations caused by bursting bubbles of gas that ripple throughout the bodies of many stars—can reveal far more information about the stars' histories and inner ...