how are black holes formed?

Question

And are they big enough to suck in planets if so then what would happen if a black hole appeares close to our solar system

Answer 1

Black holes form when super massive stars collapps in on themselves because of their own weight.
There gravity is so strong because they have all that original mass but it has become so dense that its pull no means even light cannot escape.
Ironically black holes do emit gamma radiation and are actually the cause of the biggest emiter of light because the smallest objects get sucked in first which is gases and as they spiral into the black hole the friction generated by the different rotational speeds emits light,

Get to close to a black hole and you can't escape however black holes can't just magically appear so we are quite safe

Answer 2

One myth people usually believe is that black holes "suck" planets or material in. This is true in certain cases, but in the most part of peoples imagination, its wrong. A black hole, has mass, try not to see it as a hole, more as a really really dense star, so dense, that gravity stops light escaping from it.
So, if the Sun was condensed so far that it would become a black hole (and we would need to compact it into a size equivalent to a large town). Its mass would remain the same as it was now. The earth, and all other planets would carry on orbiting the black hole as though it were the Sun, because the force of gravity is only dependant on the mass of the object, and the distance square from it.
To form a black hole, usually, after the giant stages of stellar evolution, stars have to be around 1 - 3 times as large as our star now. So, our sun will not become one, but it wouldn't matter if it did, if we managed to live through the various other stages of its life, we would not be sucked into it.
The case where black holes do suck in material is just as though and asteroid fell too close to the sun, the suns mass would pull on it, the asteroid unable to escape would plummet into the sun.
Just with a black hole, once past the event horizon (the area where the velocity needed to escape is the speed of light) the asteroid has no hope in hell of getting back out.

Answer 3

The black hole is formed when a large sun collapses ,and the parts are accelerated faster and faster until they reach the speed of light where its mass becomes infinity. Normally forms in the middle of a galaxy ,and holds all the solar systems in orbit with it's huge gravity well that can be 100 light years across. a black hole can consume hole solar systems.

Answer 4

If a black hollow ought to exist it would stick to a chain of activities initiated by ability of a great-nova explosion. A 20 image voltaic mass action picture star, after exploding would depart a remnant that must be approximately 2 to 3 image voltaic plenty and a diameter of approximately one hundred km,a white dwarf. If the white dwarf accreted any count,this is gravity would reason it give way right into a neutron action picture star. This 2 to 3 image voltaic mass entity would have a diameter of between sixteen and 20 km. If the neutron action picture star gained some mass,such that this is shape ought to no longer guard this is diameter it would give way to approximately 3 km diameter.. the exterior gravity would be such that the exterior get away velocity would be greater effective than the value of sunshine and it would become invisible. Black holes are strictly theoretical entities and there are some compelling explanation why they won't be able to exist.

Answer 5

There formed when huge stars die and implode. A black hole will suck in anything within a certain distance and nothing can escape

Answer 6

blackholes are born when stars that fall under the corresct parameters collaspe. to give you an idea of size The black hole at the center of the Andromeda Galaxy has an opening that 99,000,000 of our suns could fit into. "Suns", not planets

Answer 7

Read Stepjhen Hawkings book "A short history of time"

Answer 8

They were formed using huge quantities of black paint.

Answer 9

formed by huge forces
(formados poe forças gigantescas)

of course our planets would be suck into it
(é claro que os nosso palnetas seriam sugados por ele)

☼

Answer 10

Hey, you can get into trouble talking about black hos