Eta Canis Majoris (η CMa, η Canis Majoris) is a star in the constellation Canis Major. It has the traditional name Aludra.
Aludra shines brightly in the skies in spite of a large distance from Earth due to being intrinsically many times brighter (absolute magnitude) than the Sun. A blue supergiant, Aludra has only been around a fraction of the time our Sun has, yet is already in the last stages of its life. It is still expanding and may be becoming a red supergiant, or perhaps has already passed that phase, but in either case it will become a supernova within the next few million years.
The name Aludra originates from the Arabic: عذرا al-‘aðrā "the virgin". In ancient times Arabic astrologers/astronomers referred to a group of four stars in the Canis Major constellation, also known as the "Greater Dog", as Al 'Adhara "the virgins".
η Canis Majoris is classified as an Alpha Cygni type variable star and its brightness varies from magnitude +2.38 to +2.48.
from http://en.wikipedia.org/wiki/Eta_Canis_Majoris
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Aludra shines brightly in the skies in spite of a large distance from Earth due to being intrinsically many times brighter (absolute magnitude) than the Sun. A blue supergiant, Aludra has only been around a fraction of the time our Sun has, yet is already in the last stages of its life. It is still expanding and may be becoming a red supergiant, or perhaps has already passed that phase, but in either case it will become a supernova within the next few million years.
The name Aludra originates from the Arabic: عذرا al-‘aðrā "the virgin". In ancient times Arabic astrologers/astronomers referred to a group of four stars in the Canis Major constellation, also known as the "Greater Dog", as Al 'Adhara "the virgins".
η Canis Majoris is classified as an Alpha Cygni type variable star and its brightness varies from magnitude +2.38 to +2.48.
from http://en.wikipedia.org/wiki/Eta_Canis_Majoris
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