When you think about stars twinkling overhead, you probably don’t associate them with a color. But the star Sirius shifts through every color of the rainbow. That effect is thanks to the same ...

You thought the brightest star is Polaris, right? Or one of the stars in Orion? Nope! Sirius—the “Dog Star”—never seems to get the recognition it deserves. It’s the brightest star in the night sky by ...

Step outside this week around 9 p.m. local time and look about one-third of the way up from the southern horizon, and your eyes will be met by a dazzling celestial solitaire: Sirius, the Dog Star. It ...