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In the constellation of Canus Major, Sirius is the brightest star in the night sky. Outdistancing #2 by twice as much. The star we see as Sirius was actually a binary star consisting of a white main sequence star (Sirius A) and a faint white dwarf companion (Sirius B). However, Sirius B went supernova, and while its remains help Sirius remain king of Bright, it's no longer two stars. It's bright because of both its luminosity and its proximity to Earth. Two times as massive as our sun and 25 times more luminous, the "Dog Star" lives in a system that is between 200 and 300 million years old.
If you can't immediately find it by its brightness, just find Orion's belt and follow the line of it to the left to Sirius. You can't miss it. It also forms one point of the "Winter Triangle" with fellow mates Procyon and Betelguese.
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