Sirius is a binary star system consisting of two white stars orbiting each other with a separation of about 20 AU [e] (roughly the distance between the Sun and Uranus) and a period of 50.1 years. The brighter component, termed Sirius A, is a main-sequence star of spectral type early A , with an estimated surface temperature of 9,940 K . [ 14 ]

2025年1月14日 · 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 .

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...

2025年2月21日 · By early April, Sirius will be moving noticeably toward the sunset glare. See it now. It’s the legendary Dog Star, part of the constellation Canis Major the Greater Dog. From the Northern...

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 ...

2024年6月9日 · Sirius is a bright star, 25.5 times more luminous than the Sun, and in astronomical terms it is close. It lies at a distance of 8.6 light years, in celestial terms this is our back yard, making it the seventh nearest star to the Sun.

Sirius and the Sun are both celestial bodies that emit light and heat, but they differ in size and distance from Earth. The Sun is a massive star at the center of our solar system, while Sirius is a smaller star located in the constellation Canis Major.

Typically, the only objects that outshine Sirius in our night sky are the sun, moon, Venus, Jupiter, Mars, and sometimes Mercury. Sirius’ brightness can be attributed to its luminosity and proximity at a distance of 8.6 light-years. There are few stars that are closer to Earth, but none of them can match Sirius’ magnitude.

Sirius is the brightest star in the night sky. It is a binary star system in Canis Major, near Orion. It has an apparent magnitude of −1.46. The system is between 200 and 300 million years old. [1] . It was originally composed of two stars: one was blue-white and one was white.

Scientific evidence now supports Sirius mythology that measures our two-sun solar system. Explore the Binary Star theory today. It took over 200 years for the world to accept the solar system model.