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The mass of a black hole can be calculated by observing the movement of any object which is in orbit around it - or simply close enough to be affected by the black hole's gravity. The same method can be used to calculate the mass of other objects - for example, both stars in a binary star system.

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Q: How do they measure the mass of black holes?
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Related questions

What is stronger sun or black hole in space?

Impossible to answer as it's a measure of mass, and there as black holes with less mass than the Sun and some with more.


Can a black hole be as big as a human?

Technically yes, realistically, probably not. The best measure of the size of a black hole is the size of the event horizon. That we know of, black holes fall into two general categories: stellar mass black holes and supermassive black holes. The diameter of the event horizon is directly proportional to the mass. Stellar mass black holes range in mass from about 3 to 30 times the mass of the sun, with diameters several miles to several tens of miles. Supermassive black holes are millions to billions times the mass of the sun and are millions to billions of miles across. A black hole with roughly the mass of Saturn would have an event horizon about as wide as an adult human is tall, but there is no known way for an object of that mass to become a black hole.


What has a lot of mass?

Black holes.


What is the most common form of black holes in the universe?

Probably stellar mass black holes


How do you weigh a black hole?

Black holes aren't a measure of matter. They are immense forces of gravity so strong not even light can escape it (I.e the name BLACK hole). So, while you cannot technically measure a black holes weight you could hypotheticallly measure it's denisity by measuring it's gravitational pull on an object and rationalize that with it's mass. Cha cha on!


How do black holes survive?

it's mass


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.


How does a black holes acquire greatest mass?

Most black holes are stellar mass black holes with masses comparable to those of large stars as they form from the collapse of massive stars. Scientists know of the existence of supermassive black holes that are millions to billions of times the mass of our sun and can be found in the centers of most galaxies. Scientists still do not know how these black holes become so massive.


What do very large mass star become at the end of their life cycle?

The most massive stars will die as black holes.


Is a black hole just a hole in space that contains no matter?

No. Without matter there would be no black hole. The black holes confirmed to exist so far actually have a fairly large amount of matter (or mass) - at least 2-3 times the mass of our Sun. The largest black holes have millions or even billions of times the mass of our Sun.No. Without matter there would be no black hole. The black holes confirmed to exist so far actually have a fairly large amount of matter (or mass) - at least 2-3 times the mass of our Sun. The largest black holes have millions or even billions of times the mass of our Sun.No. Without matter there would be no black hole. The black holes confirmed to exist so far actually have a fairly large amount of matter (or mass) - at least 2-3 times the mass of our Sun. The largest black holes have millions or even billions of times the mass of our Sun.No. Without matter there would be no black hole. The black holes confirmed to exist so far actually have a fairly large amount of matter (or mass) - at least 2-3 times the mass of our Sun. The largest black holes have millions or even billions of times the mass of our Sun.


Is an Intermediate-mass black hole a type of black hole?

Yes. Intermediate-mass blackhole is a medium size black hole. Scientists have found stellar black holes and supermassive black holes but there is no prove that Intermediate-mass black type of black holes exist. My opinion is that they do exist because when a black hole is becoming a black hole supermassiveblack hole it will need to go though this stage of intermediate-mass black hole.


What kind of stars become black holes low mass or medium mass or high mass?

High-mass stars might become black holes, if the remaining matter (after the supernova explosion) is sufficiently large.