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There are not black dwarfs. It would take trillions of years for a white dwarf to cool to a black dwarf, which is more than the current age of the universe.
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∙ 8y ago
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Is a white dwarf smaller than a red dwarf?
Yes, far smaller. A red dwarf is a whole star in and of itself. A white dwarf is the collapsed remnant of the core of a low-to medium mass star. A white dwarf may be about the size of Earth.
Which types of stars are invisible?
If a star is younger in years than it is distant in light years we will not see it. It is there but because of its age and distance the star will be unseen as the light emitted from it has not reached us. Also black holes which use to be stars are 'invisible' as they do not emitt or reflect light.
Which is bigger a galaxy or a white dwarf star?
All galaxies.A white dwarf star is the remains of a medium sized star that has ended it's life - so they are everywhere.
How far from earth is the star Adhil?
It is 196 light years far from the earth. In fact Adhil(Arabic name) is a binary star in the Andromeda constellation.
How far is earth to the matar star?
five feet..
How far away is the dwarf star from earth?
The nearest dwarf star is Proxima Centauri, about 4.24 light years away and so dim it can't be seen in binoculars.
Is a white dwarf smaller than a red dwarf?
Yes, far smaller. A red dwarf is a whole star in and of itself. A white dwarf is the collapsed remnant of the core of a low-to medium mass star. A white dwarf may be about the size of Earth.
What is the cycle of the black dwarf star?
There are no "cycles". A black dwarf star is the final stage of a white dwarf - a white dwarf that has cooled down so much that it no longer emits significant amounts of radiation. The Universe is currently too young to have black dwarves; white dwarves are expected to become black dwarves in the far future.
When a star becomes a black dwarf it?
In that case, it will basically stop emitting any radiation. No star has had time so far to become a black dwarf - the Universe is too young for that. This is because it takes a white dwarf a long, long time to cool down.
Does a red dwarf generate a lot of energy?
It depends on what you consider to be a lot of energy. A red dwarf generates far less energy than other classes of star, but still far more than anything on Earth.
What is old cold star?
That means that it's a start, that it's old, and that it's cold.Basically it might refer to a black dwarf - a hypothetical star that doesn't exist yet, but which it is assumed will exist in the far future - a white dwarf that has cooled down.
Which types of stars are invisible?
If a star is younger in years than it is distant in light years we will not see it. It is there but because of its age and distance the star will be unseen as the light emitted from it has not reached us. Also black holes which use to be stars are 'invisible' as they do not emitt or reflect light.
What prevents a black dwarf star from shrinking indefinitely?
It is believed that black dwawfs are the burnt out hulks of white dwarfs. In its dying phase a star 1.5 solar masses or less will shrink to something around the size of the Earth, and there is no more nuclear fusion taking place , but heat remaining will make it continue to shine for several billion years. It can only shrink so far because of electron degeneracy, a condition where the electron repulsion stops them from being pushed any closer together.It will not shrink further as a black dwarf.
Which is bigger a galaxy or a white dwarf star?
All galaxies.A white dwarf star is the remains of a medium sized star that has ended it's life - so they are everywhere.
How far is the wolf 359 from the earth?
Wolf 359 is a tiny red dwarf star 7.8 light-years away. At magnitude 13, it is not visible in hobbyist-class telescopes.
How far is the star eliptic from earth?
I don't think there is such a star. If you mean the ecliptic, that's not a star - it is the plane of Earth's orbit.
How far is the star Eridanus from earth?
Eridanus is a constellation - not a single star
