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Sirius

Sirius (, a romanization of Greek Σείριος, Seirios, lit. "glowing" or "scorching") is a star system and the brightest star in the Earth's night sky. With a visual apparent magnitude of −1.46, it is almost twice as bright as Canopus, the next brightest star. The system has the Bayer designation Alpha Canis Majoris (α CMa). What the naked eye perceives as a single star is a binary star system, consisting of a white main-sequence star of spectral type A0 or A1, termed Sirius A, and a faint white dwarf companion of spectral type DA2, designated Sirius B. The distance separating Sirius A from its companion varies between 8.2 and 31.5 astronomical units.Sirius appears bright because of its intrinsic luminosity and its proximity to Earth. At a distance of 2.6 parsec… more »