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There really is no answer. A black dwarf is simply a white dwarf that has gone out, after it has radiated all its heat. This process, however, takes an enormous amount of time and our universe is not old enough to acommodate it. Consequently, there is no such thing as a black dwarf anywhere in the universe to begin with, it is a theoretical concept. Strictly speaking, I wouldn't call a black dwarf a "star" either. It was once a star, it now is ("will be" to be precise!) a dead celestial body, a "stellar remnant" as it is called.
If I should take a guess, however, I'd say it's smaller than a planet, given that this is the average white dwarf's size. The energy (heat) that it has lost will probably result in a loss in mass (remember E=mc2?)
What else can I help you with?
What can you assume about the gravitational pull of the brown dwarf system?
The gravitational pull of a brown dwarf system would be weaker than that of a star system but stronger than that of a planet. It is sufficient to keep the system objects in orbit around the brown dwarf.
How does a brown dwarf compare to our sun?
The distinguishing feature is that a brown dwarf gets hot enough to fuse deuterium (hydrogen-2), but not hot enough to fuse hydrogen-1.
Is a brown dwarf bigger than the sun?
No Brown Dwarfs are too small to be considerred a star.
What is the difference between red and brown dwarf stars?
Red dwarf stars are massive enough to undergo nuclear fusion, so they would burn a long time before they run out of fuel. Brown dwarves are not massive enough for nuclear fusion, so almost all of its light come from the time when the brown dwarf was formed. Over a long period of time, a brown dwarf would cool down into a gas giant similar to Jupiter.
Why is earth not as big as the sun?
Because there is a physical limit to how big a planet can be - especially a terrestrial planet. A gas planet like Jupiter can be a lot larger, but only to a certain limit, after that it can only become a brown dwarf or star. Nothing apart from a star can be as large as our Sun.
What is a big dwarf called?
Big dwarf: Naxiotis SUPER big dwarf: Tera-dwarf
What is a possible outcome for a protostar that does no have enough material?
A brown dwarf.A brown dwarf.A brown dwarf.A brown dwarf.
How long will it take for a brown dwarf to become a black dwarf?
A brown dwarf will never become a black dwarf. A black dwarf is what becomes of a white dwarf. This process takes hundreds of trillions of years.
What does a white dwarf become when it gets colder?
A brown/black dwarf.
Is a brown dwarf star on its way to becoming a black dwarf?
No. A brown dwarf is a star that has too low a mass to start nuclear fusion. A black dwarf is a former white dwarf, the remnant of a low to medium mass star that ran out of fuel in its core.
What is a small brown star called?
That's called a brown dwarf.
Are brown dwarf stars young or old?
They can be any age. A brown dwarf is a failed star, one that is not massive enough to start nuclear fusion. A brown dwarf may have formed recently, or could be almost as old as the universe itself.
What can you assume about the gravitational pull of the brown dwarf system?
The gravitational pull of a brown dwarf system would be weaker than that of a star system but stronger than that of a planet. It is sufficient to keep the system objects in orbit around the brown dwarf.
How big is the dwarf shark?
The dwarf shark is about the size of your hand.
Can a star be a brown dwarf?
Yes, a brown dwarf is a star that failed to ignite hydrogen fusion because it did not have enough mass for a strong enough gravitational collapse. Brown dwarf stars glow dimly with residual heat for a very short time.
What in not a red Tomato celebrity new big dwarf early girl beefsteak?
New Big Dwarf
Will the sun become a brown dwarf?
No. A brown dwarf is a failed star, one that is not massive enough to start nuclear fusion. The sun is well above the threshold of fusion. When it dies it will become a white dwarf.
