Sirius - Wikipedia
网页Sirius is a binary star consisting of a main-sequence star of spectral type A0 or A1, termed Sirius A, and a faint white dwarf companion of spectral type DA2, termed Sirius B. The distance between the two varies between 8.2 and 31.5 astronomical units as …
Sirius | Facts & Location | Britannica
网页Sirius, brightest star in the night sky, with apparent visual magnitude −1.46. It is a binary star in the constellation Canis Major. The bright component of the binary is a blue-white star 25.4 times as luminous as the Sun.
See Sirius, the brightest star in the night sky - EarthSky
网页2024年2月2日 · Sirius is the sky’s brightest star. You’ll always know it’s Sirius because Orion’s Belt – 3 stars in a short, straight row – points to it. Also, as seen from the latitudes like those in...
Sirius: The brightest star in Earth's night sky | Space
网页2023年10月24日 · Sirius, also known as the Dog Star or Sirius A, is the brightest star in Earth's night sky. The name means "glowing" in Greek — a fitting description, as only a few planets, the full moon and the...
Sirius (α CMa): Star System, Facts, Location, Constellation - Star …
网页2019年9月9日 · Sirius, Alpha Canis Majoris (α CMa), is the brightest star in the night sky and one of the nearest star systems to Earth. It has an apparent magnitude of -1.46 and lies at a distance of only 8.6 light years from the Sun. It is also known as the Dog Star, in reference to its position as the luminary of the constellation Canis Major, the Greater ...
Sirius is the Brightest Star in the Sky - AstroBackyard
网页Sirius is known for being the brightest star in the night sky and is nearly twice as bright as the next brightest star, Canopus with a magnitude of -1.46. Sirius is also known as the ‘Dog star’ because it is part of the constellation Canis Major, which is Latin for “the greater dog.”
Meet Sirius, the Brightest Star - Sky & Telescope
网页2018年3月27日 · As an A-class star, Sirius is significantly larger than our Sun and shines with an absolute magnitude more than 20 times more luminous. But it’s still on the main sequence, which means it’s still burning hydrogen in its core — it hasn’t expanded into a giant phase yet.
Sirius (α Canis Majoris) | Facts, Information, History & Definition
网页2019年12月6日 · Sirius is a binary star consisting of a main-sequence star of spectral type A0 or A1, termed Sirius A, and a faint white dwarf companion named Sirius B, which is a spectral type DA2 star.
Sirius: The Dog Star (Alpha Canis Majoris) – Constellation Guide
网页2014年6月29日 · Sirius, also known as the Dog Star, α Canis Majoris (Alpha Canis Majoris), or Canicula, is the brightest star in the night sky. It lies at a distance of 8.60 light years (2.64 parsecs) from Earth, in the constellation Canis Major, the Greater Dog.
Sirius Star – Facts About The Brightest Star From Earth
网页Sirius, also known as Alpha Canis Majoris, is the brightest star in the constellation of Canis Major, located in the southern sky, and overall the brightest star in the night sky. It has an apparent magnitude of 1.46, making it twice as bright as …