Sirius is a triple-star system. Sirius A is an A-type star. Sirius B and C are a D-type star. See Stellar Classification for more information. It is the brightest star in the night sky.
History and Future
Sirius is moving further south. 70,000 Years ago it was near the same declination as Betelgeuse. Precession has also made the star invisible in northerly latitudes during a period of a few thousand years and is only gonna increase as the star moves further south.