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Either nothing or just unknown. Dark matter is a term used by scientists to describe the apparent missing mass of the universe. It is either made up of matter that we can't detect or an error in calculation due to a fundamental error in our current understanding of the nature of the universe. (I suspect the latter).
What else can I help you with?
Why the event horizon of a black hole stop the light from getting rid of that?
The event horizon is the point of no return around a black hole where the escape velocity exceeds the speed of light. Light cannot escape from beyond the event horizon because the gravitational pull is so strong that even light cannot overcome it. This is why the event horizon appears to "trap" light within the black hole.
What is the name for the boundary around a black hole beyond which events cannot affect the observer?
The "boundary" you're probably thinking of is called the event horizon. Past this point, the escape velocity of the black hole exceeds the speed of light, meaning nothing, including light, can escape it.
What is the difference between the inner event horizon and outer event horizon?
the event horizon is an imaginary spherical or ellipsoidal shell at a certain altitude above the singularity of the black hole, the shape and altitude above the singularity of this imaginary shell depends on only three properties of the singularity: mass, spin, and charge. the event horizon shell is not solid and so things fall through it quite easily, but nothing inside it can go outside it including lighta black hole has no surface, only a singularity of infinite density at its center
What are the two parts of the black hole?
The two parts of a black hole are the event horizon and the singularity. The event horizon is the "surface" of the black hole, and is imaginary. The event horizon's appearance is caused by the bending of light. The singularity is a point of space where everything that gets sucked in is crushed to about the size of an atom.
How is the term 'event horizon' defined?
The event horizon is a "point of no return"; anything within the event horizon can't get out, even at the speed of light.An event horizon is the "surface" of a black hole. It is the line that is crossed right where the chaos stops and the actual hole begins. it is theorized that beyond this horizon, all of the laws of physics cease to exist. A single hydrogen atom becomes a billion mega-ton hydrogen bomb. an entire planet fits on the head of a needle, that sort of thing.In general relativity, an event horizon is a boundary in spacetime, most often an area surrounding a black hole, beyond which events cannot affect an outside observer. Light emitted from beyond the horizon can never reach the observer, and anything that passes through the horizon from the observer's side appears to freeze in place, with its image becoming more redshifted as time proceeds.
Is the Event Horizon the surface of singularity?
No, the Event Horizon is outside the singularity.The singularity probably has no surface as it is an infinitesimal point.
Can an evanescent wave bounce off the event horizon of a black hole and convey what's inside?
The event horizon is not a surface you can touch, or from which things can "bounce off". It is simply the point of no return - if anything gets inside the event horizon, then it can't get out anymore, no matter in what direction it moves, and even if it moves at the speed of light.
What is the event horizon in a black hole?
That is the "point of no return". Within the event horizon, gravity is so strong that anything that crosses the event horizon can't get out, even if it moves at the speed of light.
What is the entity located at the event horizon of a black hole and how can it be defined?
The entity located at the event horizon of a black hole is called the singularity. It is a point of infinite density and gravity where the laws of physics as we know them break down. The singularity can be defined as a theoretical point in space-time where matter is infinitely compressed.
How do black holes eject matter if they are so massive nothing can escape their gravitational pull?
As matter nears and crosses the event horizon, it is violently torn apart. This causes the release of huge amounts of radiation and particles from just outside of the event horizon. This is one reason why the swallowing of a star by a large black hole is so catastrophic; unimaginable amounts of radiation and particles are released.Note that the matter is ejected outside the black hole - to be more precise, outside the event horizon, which is the "point of no return".
What phrase has been used to describe the event horizon in black holes?
The phrase commonly used to describe the event horizon in black holes is "point of no return."
Why the event horizon of a black hole stop the light from getting rid of that?
The event horizon is the point of no return around a black hole where the escape velocity exceeds the speed of light. Light cannot escape from beyond the event horizon because the gravitational pull is so strong that even light cannot overcome it. This is why the event horizon appears to "trap" light within the black hole.
Does a black hole have an horizon?
The so-called "event horizon" of a black hole is the point-of-no-return. That means that anything that gets inside the event horizon can't get out any more, even if if it moves at the speed of light.
What is the name for the boundary around a black hole beyond which events cannot affect the observer?
The "boundary" you're probably thinking of is called the event horizon. Past this point, the escape velocity of the black hole exceeds the speed of light, meaning nothing, including light, can escape it.
What is the difference between the inner event horizon and outer event horizon?
the event horizon is an imaginary spherical or ellipsoidal shell at a certain altitude above the singularity of the black hole, the shape and altitude above the singularity of this imaginary shell depends on only three properties of the singularity: mass, spin, and charge. the event horizon shell is not solid and so things fall through it quite easily, but nothing inside it can go outside it including lighta black hole has no surface, only a singularity of infinite density at its center
Is there any other black hole gravity apart from the event horizon?
Gravity is towards the center of the black hole. The event horizon is not what attracts objects - it is simply the "point of no return".
What can escape a black hole?
Simply put, nothing can escape a black hole. Not even light. The only matter than has even remotely 'escaped' (and I use the term loosely) a black hole is just "lucky". Some matter is saved at the brink and thrust light years into space. Once something crosses the Event Horizon, however, that's it. The Event Horizon is the point of no return.
