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What is the size of Sirius?

Updated: 4/28/2022
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Sirius has a mass 0.978 that of the Sun, and a radius 0.0084 times that of the Sun.

No, actually Sirius A has a mass of 2.2 that of the Sun and a radius 1.711 times that of the Sun.

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Q: What is the size of Sirius?
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Continue Learning about Astronomy

Is the sirius star 10 times bigger then the sun?

No. In terms of diameter Sirius is 1.7 times the size of the sun.


What can you infer about Sirius's size and temperature that would explain why it look's brighter than Barnard's Star?

if you want to know this question go to www. sirius's size and barnard's star.comif you need facts.thanksLisa Adjouadi5th grade student


Is the sun sirius a supergiant?

No. Sirius is actually two stars. The main body, Sirius A, is a fairly large star, larger than the sun, but it is nowhere near the size of a supergiant. Sirius B is a white dwarf, a small, dense remnant of a star that is, int his case, slightly smaller than Earth.


What is the size and color of the star Sirius?

Sirius is actually a binary star system, which means there are two stars (A & B).Sirius A is 25 times more luminous that our Sun. It is estimated to be twice as large as our Sun.It is a type A star and is thus classified as a between Sub Giant and Giant.Sirius B is a white dwarf and has the mass of the Sun but the size of the Earth.Both stars are spherical in shape.


Is sirius a star or planet?

The star Sirius is not a planet or even a single star but is in fact a binary star, or two stars that orbit each other. Together, these two stars are often called The Dog Star, as they are the brightest object in the constellation Canis Major - or The Big Dog. The stars, named Sirius A and Sirius B, orbit each other about 20 Astronomical Units (the distance from the Sun to the planet Uranus) that takes about 50 years to complete on orbit. Right now, they appear to be moving away from each other and will reach their maximum separation on the year 2019. At a distance of roughly 8.6 light years, the Sirius binary star system is actually relatively close to us. Sirius A (the larger of the two binary stars) is also extraordinarily bright, about 25 time brighter than our sun. These two factors make Sirius one of the top ten brightest stars in our night sky. While Sirius A is very large and bright, Sirius B (the smaller of the two binary stars) is significantly smaller than it's companion - about the size of our Earth. But even at it's small size, Sirius B still has nearly the same mass as our Sun. That much mass in such a tiny space means more surface gravity (about twice that of Sirius A) and more heat (about 2.5 times that of Sirius A). Just because it's small, doesn't mean it's not awesome. Sirius is considered a wintertime star, usually only seen between the months of December and March. It is part of the Winter Triangle asterism along with Betelgeuse and Procyon. So if you're in the Northern Hemisphere and the weather begins to turn cold, take a look into the southern night sky and find Sirius, The Dog Star!

Related questions

Is the sirius star 10 times bigger then the sun?

No. In terms of diameter Sirius is 1.7 times the size of the sun.


What is the size of Sirius A?

0.987 (SM) Solar Masses.


What is the size is Sirius?

Sirius has a mass 0.978 that of the Sun, and a radius 0.0084 times that of the Sun. No, actually Sirius A has a mass of 2.2 that of the Sun and a radius 1.711 times that of the Sun.


What is sirius A named after?

Sirius was named after the word 'blazing' which fits because it is the brightest star in the night sky AND twice the size and brightness


How do you get the scale?

If Our Star Were the size of a Basketball, Sirius A (Main Sequence) Would be a size of A Teddy Bear.


How do you do scale?

If Our Star Were the size of a Basketball, Sirius A (Main Sequence) Would be a size of A Teddy Bear.


What is the size of the Sirius (A) star?

Multiple questions. See related questions.


What can you infer about Sirius's size and temperature that would explain why it looks brighter than Barnard star?

if you want to know this question go to www. sirius's size and barnard's star.comif you need facts.thanksLisa Adjouadi5th grade student


What can you infer about Sirius's size and temperature that would explain why it look's brighter than Barnard's Star?

if you want to know this question go to www. sirius's size and barnard's star.comif you need facts.thanksLisa Adjouadi5th grade student


Is the sun sirius a supergiant?

No. Sirius is actually two stars. The main body, Sirius A, is a fairly large star, larger than the sun, but it is nowhere near the size of a supergiant. Sirius B is a white dwarf, a small, dense remnant of a star that is, int his case, slightly smaller than Earth.


Is Sirius a cold star?

No. Sirius is far from a cold star. Sirius is actually a binary system about 8.6 light years away. Sirius A is a white main sequence star just over twice the size of the sun. Sirius B is a white dwarf stellar remnant of about 0.978 solar masses. The temperature of the two stars are far higher than that of our sun. The sun is about 5778 Kelvin, Sirius A is almost twice that at 9,940 K and Sirius B is many times that at 25,200 K.


Is sirius a cold?

No. Sirius is far from a cold star. Sirius is actually a binary system about 8.6 light years away. Sirius A is a white main sequence star just over twice the size of the sun. Sirius B is a white dwarf stellar remnant of about 0.978 solar masses. The temperature of the two stars are far higher than that of our sun. The sun is about 5778 Kelvin, Sirius A is almost twice that at 9,940 K and Sirius B is many times that at 25,200 K.