Loading…
Loading contentLoading…
Loading contentSirius is a hot, blue-white star in the constellation Canis Major, the Greater Dog. It is the brightest star in the night sky, a combination of being genuinely luminous and lying close to the Sun in galactic terms — about 8.6 light-years away.
Sirius is a binary system. The bright star we see, Sirius A, is a main-sequence star noticeably hotter and more massive than the Sun. Orbiting it is Sirius B, a faint white dwarf — the dense, Earth-sized remnant of a star that has ended its main lifetime.
From the Northern Hemisphere, Sirius dominates winter evenings. The three stars of Orion's Belt point down and to the left toward it. Because it is so bright and often low in the sky, it frequently twinkles in vivid colors.
How this connects across Asteria Star — scientific, cultural, and astrological links are kept separate.
Verified imagery of Sirius will appear here.
Prepared for official NASA / ESA integration. We publish only openly licensed and public-domain media, with full credit, license, and source for every image.
Our sources & licensing policy →