Astronomers measure a star’s brightness using the apparent magnitude system, where lower values indicate brighter stars.

To find Adhara, first locate Sirius, then look just below to see ... Adhara is a binary star system approximately 430 light-years from Earth. The primary star, a blue-white supergiant, is the ...

This week’s first small-telescope target is Sirius B, the companion to the night sky’s brightest star, Alpha (α) Canis Majoris. American telescope-maker Alvin Graham Clark discovered that ...