Sirius or the Dog Star: Sirius is very famous as the Dog Star. Also known as SiriusA, the dog star in fact, is the brightest star on our planet’s night sky. From the southern hemisphere, the star is easily visible during the summer nights.
The Dog Star is almost twice as bright as Canopus, which is the second brightest star on our Sky. Sirius Sirius or the Dog Star has visual apparent magnitude of -1.46. Being brightest on our sky, SiriusA was popular from the ancient ages. The name was derived from Greek, which means “Glowing”.
In 1862, the astronomers astonished the world by identifying a companion for Sirius called SiriusB. SiriusB was so much dimmer in comparison to its companion and so it was overlooked. Only in 2005, the scientists could able to estimate the mass of SiriusB. Sirius is almost 10,000 times brighter than its little brother. You need not to be surprised to know mass of SiriusB is almost 98% that of the Sun’s.
Sirius is famous as the Dog Star because of its presence in the Canis Major constellation. Canis Major means ‘the greater dog’ in Latin. The star was present in many ancient literatures and records including Greek and Polynesians.
There are two reasons for the Sirius to be the brightest from Earth. The very first reason is, no doubt, its intrinsic luminosity. The second reason is its proximity to Earth. SiriusA has almost twice the mass of our Sun and almost 25 times more luminous.