0
What else can I help you with?
Are any of the 20 nearest or 20 brightest stars white dwarf?
Yes, some of the 20 nearest stars are white dwarfs. For example, Sirius B, the companion star to Sirius A, is a white dwarf. Among the 20 brightest stars, Sirius B is the only white dwarf.
Can you give an example of a hot star which is not very bright?
A white dwarf star can be very hot due to residual heat from its earlier evolution, but it may not be very bright because of its small size. This is because the heat energy is spread over a smaller surface area compared to larger, brighter stars.
What is an example of a white dwarf star?
If you are in the northern hemisphere, Winter is a good time to see Orion. Using Orions belt as pointer stars, continue down to the horizon and you'll see a very bright star - Sirius. It's the brightest star in out skies due to its actual brightness and its close proximity to our solar system (8 light years or so). It is actually a binary star system though, there are two stars in orbit about each other. The main star, Sirius A is a white hot main sequence star (active), while its companion, Sirius B, is a white dwarf star. Sirius B was thought to once be the most massive of the two, but became an inactive white dwarf some 120 million years ago. Online pictures will show the two stars side by side, the Sirius B white dwarf seen as a much smaller and dimmer star than its active companion, Sirius A. You wont be able to pick out the two stars with the naked eye.
Why is Sirius known as the Dog Star?
Not just Sirius - all stars do this. This is due to changes in density in our atmosphere.Not just Sirius - all stars do this. This is due to changes in density in our atmosphere.Not just Sirius - all stars do this. This is due to changes in density in our atmosphere.Not just Sirius - all stars do this. This is due to changes in density in our atmosphere.
What is the next stage in the life of a lower-mass main-sequence star?
white dwarf. unless you count black dwarf of which none have been observed, only theorized.
Is Sirius a dwarf star?
No, it is not a dwarf star. It's fairly large as stars go, but nowhere near the largest. However, because it is both fairly large and fairly close, Sirius is one of the brighter stars in our sky.
Are any of the 20 nearest or 20 brightest stars white dwarf?
Yes, some of the 20 nearest stars are white dwarfs. For example, Sirius B, the companion star to Sirius A, is a white dwarf. Among the 20 brightest stars, Sirius B is the only white dwarf.
Is Sirius a giant?
No. Sirius consists of two stars. Sirius A is larger than the sun but is not a giant. Sirius B is a white dwarf,
Is a white dwarf considered large or small?
A white dwarf is very small as stars go; comparable in size to a small planet such as Earth.
Which are the three white dwarf stars?
Sirius B, IK Pegasi B, GD 358, and Procyon B.
Is a white dwarf considered large or small star?
A white dwarf is very small as stars go; comparable in size to a small planet such as Earth.
Can you give an example of a hot star which is not very bright?
A white dwarf star can be very hot due to residual heat from its earlier evolution, but it may not be very bright because of its small size. This is because the heat energy is spread over a smaller surface area compared to larger, brighter stars.
Are the stars of Sirius accepted as the origin of the Milky Way yet?
No, because they are not. Sirius A and B are just two stars in a Galaxy of many billions of stars. Sirius is a few hundred million years old, younger than most of the stars in the Milky Way.
What is the age of the star Sirius b?
It's very difficult to age individual stars, but it is estimated that the Sirius system is about 200 - 300 million years old. Sirius B became a white dwarf about 120 million years ago. Big stars like Sirius rarely last more than half a quarter billion years.
What is an example of a white dwarf star?
If you are in the northern hemisphere, Winter is a good time to see Orion. Using Orions belt as pointer stars, continue down to the horizon and you'll see a very bright star - Sirius. It's the brightest star in out skies due to its actual brightness and its close proximity to our solar system (8 light years or so). It is actually a binary star system though, there are two stars in orbit about each other. The main star, Sirius A is a white hot main sequence star (active), while its companion, Sirius B, is a white dwarf star. Sirius B was thought to once be the most massive of the two, but became an inactive white dwarf some 120 million years ago. Online pictures will show the two stars side by side, the Sirius B white dwarf seen as a much smaller and dimmer star than its active companion, Sirius A. You wont be able to pick out the two stars with the naked eye.
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 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.
