The Sirius system, about 8.6 light-years from us, does include a white dwarf star (Sirius B) orbiting a companion (Sirius A). However, Sirius B is not close enough to its companion to accrete ...

This orbital motion reveals that Sirius A, the brighter star, has 2.02 ± 0.03 solar masses and Sirius B, the white dwarf, has 1.00 ± 0.02 solar masses. Liebert and his colleagues then determined ...

It was discovered in 1862 but close scrutiny isdifficult because of the glare of the primary star. "Studying Sirius B has challenged astronomers for more than140 years," said Martin Barstow of the ...

Sirius, a double-star system and the brightest object in the night sky, will briefly blink out of existence for parts of Earth on Monday evening. In an event called an occultation — when one ...

Sirius B is a white dwarf. A white dwarf is the leftover core of a main sequence star that has finished its life cycle. After using up the hydrogen and helium in its core, the star evolved through ...