The brightest star (top center) is Sirius. (Image credit: Getty Images) In 1718, English astronomer Edmond Halley discovered that stars have "proper motion" relative to one another, ...

Star Guide: A winter cosmic theater at Lake Tahoe. It’s more common than not for stars to have companions, and Sirius is no exception; it's a binary star.

The brightest star in the night sky is Sirius, also known as the "Dog Star." Here's when, where and how to see it—and glimpse its rainbow of colors.

The brightest star in the night sky, Sirius, is easily visible in January if you know when and where to look! The star Sirius is an interesting object and one that is relatively close to our planet.

The brightest star in the night sky is the Sirius star. According to NASA, it is over 20 times brighter than our sun and twice as massive, though it might not appear that way to the naked eye.

Sirius is the brightest star in the constellation of Canis Major, the Big Dog. Hence its nick-name. For the same reasons it’s catalogued by astronomers Alpha Canis Majoris.

Sirius is the brightest star of the constellation Canis Major, the "Greater Dog," in Latin. According to Burnham's Celestial Handbook other names for it include "The Sparkling One" or "The ...

You may have heard the phrase "the dog days of summer," but do you know the science behind the saying? Hint: it's got nothing ...

At magnitude -1.4, Sirius is 23 times brighter than the North Star. You can easily compare the two now: Find Polaris in the North, then turn around and face Sirius in the South. Sirius will be ...

The brightest star in Earth’s night sky, Sirius, is orbited by a white dwarf — a dead star’s core. This binary companion would have lost its planetary nebula nearly 100 million years ago ...