* Luminosity: Sirius is the brightest star in the night sky. This high luminosity is a direct consequence of its high mass.
* Spectral Type: Sirius is classified as an A-type star. A-type stars are generally more massive than our Sun (a G-type star).
* Mass: Sirius is about twice as massive as our Sun.
Low-mass stars are much fainter and cooler than Sirius. They typically live for much longer than high-mass stars.
