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

Professional and amateur astronomers have made a groundbreaking discovery with the help of artificial intelligence, ...

It's merely the 48th brightest. The brightest is Sirius, the “Dog Star,” which rises in November. Polaris is also not one star. It's a triple star system, with the point of light you see ...

A massive white dwarf and a sun-like "blue lurker" star tell a remarkable story of what was once a triple-star system in the ...

NASA has identified a rare and unusual "blue lurker" star that was produced during the collapse of a triple-star system in ...

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 ...