Whats a black hole??

Question

whats a black hole exactly? i know if u drop something in it ull nvr c it again but whats it made of? what happens to thing that get sucked in there? where do they go? and does it suck up stars?

Answer 1

ok, take an iron ball as massive as three suns

ok, there's nothing that prevents it to colapse into itself

first it will try to stop when the distance between the clouds of electrons of the atoms become near touch each other

but, the mass gravity is far stronger than electrical repulsion in the center

so the electrons are compresed the far distance between them and the nuclei

soon, the electrical charge of the electron will be nullified with the positive charge of the nuclei. result? all the protons become neutrons

the resistance stops at once and we have a three to ten km neutron block. a neutron star.

now its stopped form collapsing more and more by the limit of matter. the force that keeps the quarks together into a nucleon: the strong force

but, the strenght of the gravity could break such limit and the nucleon degenerates. yes, becomes degenerate matter

what are the quarks? vibrating energetic pulses, electromagnetic packs, not matter, packeted waves, waves occupy no space, are no matter. (are the cause of matter but no matter themselves)

CAN BE COMPRESSED withouth limit

when the limit of matter breaks, the compression goes form ten km to a geometric point. This is a black hole

in the near of it, the fisics goes from classic to relativistic to quantic to unknown

there's division by zero, limits trending to infinites, math becvomes impossible

theres a diameter, calculated by the compressed mass of the center, schawrzschild limit, event horizon. inside it nothing goes out. otside it, the atraction by gravity is intense but not unscappable, very very strong

now, take a star three to ten times bigger than the sun, the nuclear reaction avoids it from collapsing. but when the nuclear stops, it goes into a series of stages that ends in nova, (thats when the protons become neutrons) then a neutron star, then the filnal collapse

and voilá !! a black hole

Answer 2

A  star collapses in the center of the galaxy. In the process material is accelerated to the speed of light so the mass becomes infinite. They furnish the gravity in each galaxy ,that holds all the solar system in orbit. Yes they have swallowed a sun.  

Answer 3

My opinion about “ black hole”

=================================..

A black hole is a region of space in which the gravitational field is

so powerful that nothing,  not even light, can escape its pull after

having fallen past its event horizon.

http://en.wikipedia.org/wiki/Black_hole

=========================.

But to give only such explanation of “ black hole” is not complete.

There is another alternative.

There is another interpretation of “ black hole”.

A “ black hole” is not a “region of space in which the

gravitational field is so powerful that nothing, not even light,

can escape its pull “  but…..

but region with very small density (critical density : p = 10^-29g/sm^3).

And the detected material mass of the  matter in the Universe

is so small  (the average density of all substance in the

Universe is approximately  less than p=10^-30 g/sm^3)

that the “ black hole” is only a model of our Universe / Vacuum

as a whole .

===========.

John ( [e-mail])  asks:

For a non-specialist, what's the conclusion?

=========.

1.

In 1900 Planck found what “ black body” / a model of Vacuum /

can radiate . The radiation goes only by “ quanta” particles (h).

This kind of radiation is electromagnetic radiation.

2.

In 1974 S. Hawking found what “ black hole” / other model of vacuum/

can radiate . This is another kind of radiation.

This radiation explain the thermal spectrum radiation of the beginning

of star formation ( gravitation).  

http://en.wikipedia.org/wiki/Hawking_rad...

3.

So, we have two different kinds of radiation:

electromagnetic radiation and thermal radiation.

4.

Hawking radiation has never been observed because it begins

from very small “ micro black holes “ in the vacuum.

http://en.wikipedia.org/wiki/Micro_black...

And nobody know that the “ mini black hole” keeps in itself.

What is “ mini black hole “?

5.

If you are interesting you can read my opinion on the site:

a).

http://www.wbabin.net/physics/sadovnik.p...

Gravity, particles and star formation.

b).

http://www.wbabin.net/comments/sadovnik....

Entropy - My opinion.

========================..

Best wishes.

Answer 4

A black hole is a place where there is so much matter concentrated that the forces inside the atoms which keep them at a particular size are strong enough to overcome, so the whole lump of matter gets squashed down until it occupies a single point.

Black holes have very strong gravity, so anything coming very close to it will be sucked in, torn apart by the gravity and end up at the centre of the black hole, adding to the mass, which increases the gravity further.

It's possibly to orbit around a black hole as long as you don't get too close.

Black holes bend space in such a way that straight lines curve around them. Within a certain distance of the hole, straight lines curve all the way around, so it is impossible for anything, even light to escape from them, which is why they are called black.

But in fact the space outside of a black hole is far from black, as the matter falling into the hole gives off huge bursts of energy as it is torn apart.

Answer 5

http://en.wikipedia.org/wiki/Black_hole

Answer 6

"...whats a black hole exactly?..."

A black hole is a celestial object with gravity so strong that not even light can escape from it. That means the object can not be seen, hence the name 'black hole.'

"...whats it made of?..."

Most black holes are what's left behind after a very massive star explodes in an event known as a 'supernova.'

"...what happens to thing that get sucked in there?..."

In spite of what others might try to tell you, no one knows what happens to all the stuff sucked into black holes.

"...does it suck up stars?..."

Yes! Anything that gets too close to a black hole will be torn apart and sucked into the black hole.

Answer 7

A black hole is nothing more (and nothing less) than a region of space from which nothing can escape, not even light.

The word escape has a precise sense.

Any mass generates gravity:  things are attracted by mass.  Earth's mass attracts all of us towards its centre.  That is why we are stuck to the surface.

If you jump up, gravity pulls you back:  your vertical speed diminishes, goes to zero, then increases downwards.  You fall back to the ground.

The further away you get from the mass, the less gravity you feel.  If you could jump really high, the rate at which you'd slow down would be reduced.

If you could jump up fast enough, the gravity would feel weaker at such a rate that your speed would never go down to zero.

This speed is called "escape speed".

On Earth, it is 11.2 km/s (approx. 25,000 mph).

The more mass an object has (for the same size), the higher the escape speed from that object (more mass = more gravity).

The smaller an object is (for the same mass), the higher the escape speed (surface closer to the centre = more gravity).

If the entire mass of the Earth was squeezed down to a little less than 1 cm (less than half an inch), then the surface would be so close to the centre that the escape speed would be 300,000 km/s (the speed of light).  Since nothing can go faster than the speed of light (not even light), then nothing would have enough speed to avoid falling back.

Nothing could escape, not even light.

Hence the name: black hole.

We do not know what goes on inside a black hole.  We do know what cannot go on:  ordinary matter as we know it cannot exist.  Atoms cannot support such density and pressure.  Even nuclear particles cannot support the pressure.  Everything just keeps crunching down on itself.

We are not even sure what happens to time in there.

However, outside the black hole, business as usual.  Objects will be attracted by the black hole in the same manner as they would be by any other object.

For example, if the Sun was suddenly replaced by a black hole that has exactly the same mass as the Sun, the orbits of the planets would not change at all.  The planets would not get "sucked in".  (However, without sunlight, things would get very cold on Earth).

Because black holes are so small (a black hole with the same mass as the sun would only measure 3 km), it is possible for other things to get very close to them.

One problem then becomes the tidal effect (the fact that, as you are falling in feet first, the gravity acting on your feet can get much stronger than the gravity acting on your head).

The tidal effect would stretch objects and pull them apart (look up spaghettification).  This effect can get so strong that even atoms can be pulled apart while still outside the black hole.

This results in very strong radiation from objects that are not yet fallen inside, but are getting way too close.

This is how we detect black holes.  We cannot see the black hole itself (not even light can escape), and it is generally very small in size -- a few kilometres in the middle of the universe is very, very small.

But the matter that is falling in is sending out a lot of very powerful radiation as its atoms are being pulled apart or rubbing against each other with tremendous friction force.

When matter does fall into the black hole, we say that it is "feeding" (a poor choice of words, but that is the word being used).  When a black hole is feeding, things can get very hot around it (even though the black hole itself is not sending out any heat, since heat is carried by light, and light cannot escape).

Answer 8

it gravity so strong that not even light can get out; we can't tell u where the go hun we don't know enough about them all we know is that the are real

l

Answer 9

a black hole is a very small dense star with very strong gravity. according to some people they are supposedly infinitely small, but that is impossible.

Answer 10

A Black Hole is an object with such powerful gravity that nothing can escape from it, including light. The black hole's mass is concentrated in a point of almost infinite density called a singularity. At the singularity itself, gravity is almost infinitely strong, so it crushes normal space-time out of existence. As the distance from the singularity increases, its gravitational influence lessens. At a certain distance, which depends on the singularity's mass, the speed needed to escape from the black hole equals the speed of light. This distance marks the black hole's "horizon," which is like its surface. Anything that passes through the horizon is trapped inside the black hole. Black holes come in several varieties, depending on mass.At the center of every galaxy is a Super massive Black Hole These are simply the same as average Black holes except they tend to have the mass of 10 to 100 billion Suns. They are found in the centers of galaxies called active galactic nuclei.

We even have one in the center on the Milky Way Galaxy that is currently "sleeping" but when it "awakens" either earth will be thrown out into space or sucked into the black hole

And did you know that if the earth was put into a black hole it would emerge at the size of a basketball

Hope i helped

Billy