About 30 kilometers in diameter. This refers to the "event horizon". Actually this diameter is directly proportional to the mass: at twice the mass, a black hole will have twice the diameter.
Stellar black holes have been found with estimated diameters from about 20 kilometers upwards.
That really depends a lot on the size of the black hole. A supermassive black hole, in the center of a galaxy, has millions, or even billions, of times the mass of the Sun. Due to its mass, such a black hole has a much stronger attraction than a "stellar" black hole - the remain of a collapsing star, which of course won't attract you more than the star itself did during its lifetime - unless the black hole acquired more mass in the meantime.
The nearest known black hole is at a distance of several thousand light-years. Since Saturn is very near to us by comparison, it doesn't make any difference if you ask about the distance from the Solar System, from the Sun, from Earth, or from Saturn.
The singularity of a black hole is for all intents and purposes a geometric point.
The radius of the event horizon depends on the mass and the type of black hole.
For the simplest (non-charged, non-rotating) kind (a Schwarzschild hole), the radius
of the event horizon is directly proportional to the mass.
The mass of a black hole can range from a few solar masses, on up to the mass
of a small galaxy.
Quite a distance! The nearest black hole that we are aware of is the Cygnus X-1 x-ray source in the constellation Cygnus. This object is about 6,100 light years away, and is detectable only by the x-ray radiation emitted from its companion blue giant star.
As black holes go, we believe that it's pretty small, perhaps near the minimum sustainable size for black holes. It's "only" about 15 solar masses.
There may be nearer black holes that are not close to any stars; these would not radiate appreciably, and would be essentially indetectable.
Yes, but they are microscopic. When atoms smash, they sometimes create miniature black holes that quickly evaporate through Hawking radiation. But to make a destructive black hole is not possible.
A 'black hole' is a singularity ... its physical size is zero.
The diameter of its event horizon depends on its mass.
For a hole with mass equal to the sun, the event horizon is about
2.95 kilometers from the central point. I calculated that myself, so
please think of it as only an opinion.
The closest KNOWN black hole is at a distance of 3000 light-years. It seems very likely (to me, at least) that there are black holes that are closer to us, but that haven't been discovered yet.
The supermassive black hole at the center of the Milky Way is at a distance of about 28,000 light-years.
The nearest known black hole is at a distance of several thousand light-years. Since Saturn is very near to us by comparison, it doesn't make any difference if you ask about the distance from the Solar System, from the Sun, from Earth, or from Saturn.
The nearest known black hole is at a distance of several thousand light-years. Since Saturn is very near to us by comparison, it doesn't make any difference if you ask about the distance from the Solar System, from the Sun, from Earth, or from Saturn.
The nearest known black hole is at a distance of several thousand light-years. Since Saturn is very near to us by comparison, it doesn't make any difference if you ask about the distance from the Solar System, from the Sun, from Earth, or from Saturn.
The nearest known black hole is at a distance of several thousand light-years. Since Saturn is very near to us by comparison, it doesn't make any difference if you ask about the distance from the Solar System, from the Sun, from Earth, or from Saturn.
Considering that the closest black hole to earth is 1,600 light years away, and the fact the the furthest the astronauts have gotten from earth is about 225,622 miles (distance to the moon), they really haven't gotten any closer to a black hole than anyone else.
[1 light year = 5,878,499,810,000 miles]
Antares is a red supergiant and has enough mass to explode as a supernova and then collapse into a black hole.
Then, depending on the remaining mass of the star, it will collapse into a white dwarf, a neutron star (aka pulsar), or a black hole.Then, depending on the remaining mass of the star, it will collapse into a white dwarf, a neutron star (aka pulsar), or a black hole.Then, depending on the remaining mass of the star, it will collapse into a white dwarf, a neutron star (aka pulsar), or a black hole.Then, depending on the remaining mass of the star, it will collapse into a white dwarf, a neutron star (aka pulsar), or a black hole.
If you jumped into an "ordinary" Schwarzschild black hole, you would be crushed into a long line of particles, which means death by a black hole. If you jumped into a Kerr black hole, the same process may occur, but the only thing different is that a Kerr black hole spins, and a Schwarzschild black hole does not. That answer needs a bit more detail. Please use the "related link" below.
A Schwarzschild black hole is a non-rotating black hole. The Kerr black hole is a rotating black hole. Since the latter is more complicated to describe, it was developed much later.A Schwarzschild black hole is a non-rotating black hole. The Kerr black hole is a rotating black hole. Since the latter is more complicated to describe, it was developed much later.A Schwarzschild black hole is a non-rotating black hole. The Kerr black hole is a rotating black hole. Since the latter is more complicated to describe, it was developed much later.A Schwarzschild black hole is a non-rotating black hole. The Kerr black hole is a rotating black hole. Since the latter is more complicated to describe, it was developed much later.
I'm not sure, though I hypothesize that the explosion would be contained in the gravity of the black hole.
We would probaly just float away into deep space.
As far as we know, black holes cannot collapse any further. However, if a star were to collapse and form a black hole, its mass would be the same.
No. Earth would be destroyed if a black hole came anywhere close to it.
Should Earth ever collide with a black hole, it would get destroyed.
Usually from the collapse of a massive star. It isn't quite clear how a supermassive black hole is created; it is possible that it also starts as a stellar black hole (a hole resulting from the collapse of a star), but it isn't quite clear how such a black hole can get so huge in a relatively short time.Usually from the collapse of a massive star. It isn't quite clear how a supermassive black hole is created; it is possible that it also starts as a stellar black hole (a hole resulting from the collapse of a star), but it isn't quite clear how such a black hole can get so huge in a relatively short time.Usually from the collapse of a massive star. It isn't quite clear how a supermassive black hole is created; it is possible that it also starts as a stellar black hole (a hole resulting from the collapse of a star), but it isn't quite clear how such a black hole can get so huge in a relatively short time.Usually from the collapse of a massive star. It isn't quite clear how a supermassive black hole is created; it is possible that it also starts as a stellar black hole (a hole resulting from the collapse of a star), but it isn't quite clear how such a black hole can get so huge in a relatively short time.
The earth would become a black hole.
Nothing, not even light, can escape a black hole. So Earth would get caught into the black hole's path and we would be sucked up and crushed to oblivion
You cannot see a black hole when you are on Earth, unless a black hole were to absorb Earth, which even then, you would see it in a split-second before it would engulf you
My Earth, as well as my Sun, would be completely destroyed if a black hole came through our Solar System. I'm not certain what would happen to YOUR Earth.
Our planet Earth will probably not spontaneously turn into a black hole under its own gravity since it lacks sufficient mass - it would need several solar masses to so collapse, and the Earth is just a tiny fraction of the mass of the Sun.
If the Earth magically became a black hole, the moon and other satellites in orbit around Earth, would be literally ripped apart into tiny bits and swallowed by the black hole.
When a star of sufficient mass stops producing energy, it will collapse into a black hole.