How true is this statement in this article in the mailon line
Sirius is so bright because it is in fact a binary star system, two stars orbiting each other.
This is the first time I have ever heard this said
It doesn't ring true too me.
THE BRIGHTEST STAR SIRIUS
Sirius is the brightest 'star' in the night sky.
In fact it is a binary system of a white main-sequence star called Sirius A, and a faint white dwarf, Sirius B.
The Sirius binary system is 2.6 parsecs, or 8.6 light years away and is between 200 and 300 million years old.
It is composed of a white main-sequence star, which means it is converting hydrogen to helium in its core, called Sirius A, and a faint white dwarf, Sirius B.
Read more:
http://www.dailymail.co.uk/sciencete...#ixzz42Y78FoNf
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