When is the first day of summer? Find out all the facts about the longest day of the year! When is the first day of summer in ...

This might sound like an obvious thing for a professional stargazer to say. But astrophysicist Federica Bianco was reacting ...

Astronomers have discovered the largest known cloud of energetic particles surrounding a galaxy cluster—spanning nearly 20 ...

Other astronomers used similar techniques and measured the parallax of Sirius, the brightest star in the night sky. Sirius’ parallax is the very thin angle formed by the positions of Earth ...

Sirius, in the constellation Canis Major, is the brightest star in the sky. It’s twice as massive as the Sun. Alpha Centauri is a triple star system, the third brightest and closest star system ...

Canis Major’s sparkling eye is the brightest star in the sky: Sirius. The dog days of summer ... the shoulder to the viewer’s left and Rigel his foot on the right. Sitting between Rigel ...

Sirius, the brightest of the three stars, will appear first ... Castor and Pollux (from the Mars Triangle), as well as Rigel, Capella, and Aldebaran, rises in the east and sets in the west ...

Then look for the bright star on the bottom or Orion — opposite Rigel. Run a line through it ... It’s in Canis Minor and always rises before Sirius. If you look toward the west you’ll ...

Humans have been utterly fascinated with the night sky and the millions of stars sprinkled throughout the huge expanse. Out of the numerous stars, some are brighter than others, and closer to the ...

Also in the region are some of the brightest stars in the night sky, such as Sirius, Rigel, Procyon and Capella. Orion will reach its highest point in the sky around 2 a.m. in the Northern ...