0
Like other stars, Sirius formed when a cloud of gas and dust called a nebula collapsed under the force of gravity. As the cloud collapsed it formed two masses that heated up until the nuclear fusion of hydrogen ignited, turning the two masses into stars by 200 to 300 million years ago. The result was a binary star system consisting of the smaller Sirius A and the larger Sirius B. Since Sirius B was more massive it burned through its hydrogen fuel more quickly and eventually exhausted its fuel supply. By about 120 million years ago it has shed most of its mass while the remainder collapsed into a small, dense remnant called a white dwarf, leaving Sirius A as the larger, more massive body. Sirius A has not yet finished its fuel supply and will likely last for about another 1.5 billion years or so.
Wiki User
∙ 8y ago
Add your answer:
Earn +20 pts
How far apart are Sirius A and Sirius B?
Sirius is a binary star system Sirius A and Sirius B.The distance separating Sirius A from B varies between 8.1 and 31.5 AU. (See related question).
Is Sirius A a cold star?
No. There is no such thing a a cold star. Sirius consists of two stars, both of which are hotter than the average star.
What is sirius composition?
Sirius is a star, I hope this detailed information helps.
Is sirius a blue super giant?
No. Sirius is a two-star system consisting of a white main sequence star and a white dwarf.
How is the star Polaris compared to that of the star Sirius?
Sirius is the brightest star...Polaris is bigger then Sirius, Polaris is 360 to 820 light years away from earth, and Sirius is only 8.6 light years away. The Sirius star is known as the dog constalation, The polaris star is found at the tip and corner of the big dipper and the little dipper
Is the Sirius star extremely hot?
Yes - Sirius is a blue-white star - the hottest type of star there is.
Which star is called the dog star?
the dog star is called sirius and is located south west of Orion belts in the southern hemisphere
How far apart are Sirius A and Sirius B?
Sirius is a binary star system Sirius A and Sirius B.The distance separating Sirius A from B varies between 8.1 and 31.5 AU. (See related question).
Is Sirius also called the North Star?
No. The North Star is Polaris. Sirius is known as the Dog Star.
Is a sirius star bigger than a barnard star?
Yes, Sirius is quite big while Barnard's star is small.
Is 'Sirius C' real or not?
It is not real. Sirius is a two-star system containing only Sirius A and Sirius B.
Is Sirius the largest star?
No. Sirius is the brightest star in Earth's night sky, but how bright a star appears is a product of its actual brightness and its distance from us. Sirius itself is actually two stars with Sirius A emitting the vast majority of the system's light. Sirius A is a fairly large star, but others are much larger.
How is Sirius not the brightest star in the sky?
Sirius is the brightest star in the night sky, but the brightest overall is the sun.
Is Sirius A an Earth-like star?
No. There is no such thing as an "earth-like star" as Earth is a planet, not a star. Sirius A is a star that is larger and brighter than the sun.
Why is Sirius not a main sequence star?
Sirius is not a single star but a binary star system consisting of a white main sequence star and a white dwarf.
Is Sirius A a cold star?
No. There is no such thing a a cold star. Sirius consists of two stars, both of which are hotter than the average star.
Is Sirius a medium mass star?
Yes, Sirius is about twice as massive as our sun, making it a medium mass star. It is quite a bit brighter, however, and is the second brightest star in our sky.
