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There can be no average diameter for a black hole due to the fact that all black holes are unique in size and diameter, reaching from the diameter of 18 billion suns tied together and less than half a star's diameter. they are all different sizes and no one actually knows for sure whether they are actually holes considering that they are completely invisible to all eyes. because their gravitational pull is so powerful that not even light escapes.
Wiki User
∙ 10y ago
Wiki User
∙ 15y agoDepends on what you define the radius of a black hole to be. If you're referring to the schwarzchild radius, which is the radius of the event horizon then there is a specific equation for that, however all the mass of a black hole is condensed into an infinitely small point that doesn't have a radius. the schwarzchild radius is given by:
r = 2Gm(c^-2), where G is the gravitational constant, and c is the speed of light. You can plug in the numbers yourself
Wiki User
∙ 8y agoWhile black holes do come in a variety of sizes from microscopic to supermassive giants, black holes are generally very small in the relative sense because of their extreme density. A black hole of the mass of the Earth would be only about the size of a marble.
Wiki User
∙ 13y agoThe biggest black hole is about 10,000 times bigger than the solar system. You would be able to see it but it's a "black" hole so you can't see it.
Wiki User
∙ 10y agoThe same as its diameter times pi, or its radius times (2 x pi).
Wiki User
∙ 8y ago12 kilometers
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What is the length of a black hole?
The diameter is usually considered the diameter of the event horizon. The diameter of this event horizon is directly proportional to the black hole's mass. More information at http://en.wikipedia.org/wiki/Schwarzschild_radiusThe diameter is usually considered the diameter of the event horizon. The diameter of this event horizon is directly proportional to the black hole's mass. More information at http://en.wikipedia.org/wiki/Schwarzschild_radiusThe diameter is usually considered the diameter of the event horizon. The diameter of this event horizon is directly proportional to the black hole's mass. More information at http://en.wikipedia.org/wiki/Schwarzschild_radiusThe diameter is usually considered the diameter of the event horizon. The diameter of this event horizon is directly proportional to the black hole's mass. More information at http://en.wikipedia.org/wiki/Schwarzschild_radius
Do blackholes have a diameter Why or Why not?
The "diameter" of a black hole is usually taken as the diameter of the event horizon.
How big do event horizons get?
Assuming you mean the event horizon of a black hole (there are other types as well), the diameter of a black hole as measured by its event horizon is directly proportional to its mass. The larger the mass, the larger the diameter. Thus, as a black hole's mass increases, it will get bigger. The only limitation is how much mass a black hole is able to incorporate from its surroundings.
Is the black hole big?
Well if your comparing the smallest black hole knowen to humans to the Earth YES THEY ARE BIG but there is no definant diameter or size considering that all black holes are unique in all three size diameter and gravataional pull.
What is the diameter of the black hole of galaxy Andromeda?
In Jan 1987, John Cormedy of Dominion Astrophysical Observatory in Canada discovers the balck hole in Galaxy Andromeda and estimated that the diameter of black hole in Andromeda Galaxy is 10 million times as massive as the Sun.
What is the length of a black hole?
The diameter is usually considered the diameter of the event horizon. The diameter of this event horizon is directly proportional to the black hole's mass. More information at http://en.wikipedia.org/wiki/Schwarzschild_radiusThe diameter is usually considered the diameter of the event horizon. The diameter of this event horizon is directly proportional to the black hole's mass. More information at http://en.wikipedia.org/wiki/Schwarzschild_radiusThe diameter is usually considered the diameter of the event horizon. The diameter of this event horizon is directly proportional to the black hole's mass. More information at http://en.wikipedia.org/wiki/Schwarzschild_radiusThe diameter is usually considered the diameter of the event horizon. The diameter of this event horizon is directly proportional to the black hole's mass. More information at http://en.wikipedia.org/wiki/Schwarzschild_radius
Do blackholes have a diameter Why or Why not?
The "diameter" of a black hole is usually taken as the diameter of the event horizon.
How big do event horizons get?
Assuming you mean the event horizon of a black hole (there are other types as well), the diameter of a black hole as measured by its event horizon is directly proportional to its mass. The larger the mass, the larger the diameter. Thus, as a black hole's mass increases, it will get bigger. The only limitation is how much mass a black hole is able to incorporate from its surroundings.
How fat is a black hole?
A black hole can have anywhere between a few Sun masses, and several billion Sun masses (the so-called "supermassive black holes"). The diameter of the event horizon, if that's what you mean, is directly proportional to the black hole's mass - in other words, more massive black holes have a larger diameter.
Is the black hole big?
Well if your comparing the smallest black hole knowen to humans to the Earth YES THEY ARE BIG but there is no definant diameter or size considering that all black holes are unique in all three size diameter and gravataional pull.
How does a black hole not have volume if it contains no space how can it exist?
The premise of the question is faulty: a black hole is a star with a diameter less than the Chandrasekhar diameter. The body within the black hole can have a range of sizes depending on the mass of the object and its degree of compression. See http://en.wikipedia.org/wiki/Chandrasekhar_limit
What is the diameter of the black hole of galaxy Andromeda?
In Jan 1987, John Cormedy of Dominion Astrophysical Observatory in Canada discovers the balck hole in Galaxy Andromeda and estimated that the diameter of black hole in Andromeda Galaxy is 10 million times as massive as the Sun.
How large can the volume of a black hole get?
There is no theoretical limit to the MASS of a black hole. The largest known black holes have a mass in excess of a billion solar masses... so far. In the distant future, you can expect them to continue growing.The DIAMETER or the RADIUS of a black hole is directly proportional to the black hole's mass; the radius would be about 3.0 kilometers for every solar mass. The diameter, of course, is twice as much. Thus, a black hole of 10 billion solar masses would have a radius of 30 billion kilometers... about 200 AU.
How do black holes and vacuums relate by size?
The mass of a black hole determines its "size" or diameter of the event horizon. The relationship between mass and radius (Schwarzchild radius) is described by a formula in which the size is proportional to the gravitational constant and mass of the black hole and inversely proportional to the square of the speed of light.
Is a neutron star or a black hole bigger?
A black hole has more mass than a neutron star, but if you are comparing volume it would depend on the mass of the black hole. A neutron star is estimated to be about 14 miles in diameter, which is larger than the event horizon of a black hole up to about 3.8 times the mass of the sun. A more massive black hole will be larger.
Are there black holes the size of stars?
The relevant magnitude is mainly the black holes' mass. Since black holes are the result of collapsing stars, yes, there are black holes with the mass of a star.The diameter is usually taken as the diameter of the event horizon. This diameter is directly proportional to the mass; a supermassive black hole such as Sag A* has a diameter comparable to that of a large star.
Is there any way to calculate the mass of a black hole?
Currently, the way the mass of a black hole is measured is indirectly determined by the speed of its rotation and/or its gravitational influence. Note: Theoretically, the faster a black hole rotates, the more massive it is. The gravitational influence is estimated by the diameter of the event horizon (or even as the difference between the spherical edge of the event horizon and the edge of the oblate diameter of its ergosphere). Also the latest consensus is that there is not a relevant relationship between the observable size of the accumulated bulge about the Black Hole and the size of the Black Hole itself.
