Black holes do exist--there are large ones that have been observed at teh center of most galaxies. A black hole is crated when a mass is large enough(or collapses to e dense enough) that the the acceleration due to gravitational attraction exceeds the speed of light (300,000 km/sec).
Some stars are large enough that they can become supernovas--and the really big ones, when the collapse afterward, can form black holes. Our sun is not large enough to do that--it will never become a black hole.
2007-02-03 06:01:03
·
answer #1
·
answered by Anonymous
·
1⤊
0⤋
There are many good reasons why black holes cannot exist.
If they could our sun is too small to to have the virtue of becoming a black hole.
I won"t go into the features of the formation of black holes I would only repeat what you have read here.
2007-02-03 07:06:16
·
answer #2
·
answered by Billy Butthead 7
·
0⤊
1⤋
The sunlight is an intermediate mass huge call. meaning alongside the numerous stars born between 0.8 and eight image voltaic lots, it is going to die down as a white dwarf after the purple huge level. After being a planetary nebula on the proper of the purple huge level the daylight will reveil a 0.5 image voltaic mass white dwarf. To change right into a black hollow, a large call should be appropriately above 20 image voltaic lots even as it truly is born supplied it has no close better half. it truly is because the extra massive a large call, the extra mass it is going to lose because it enters the merely precise degrees of its evolution. because it loses a lot mass, there is merely no longer adequate mass to provide a black hollow remnant it truly is at minimum is about 3 image voltaic lots. sparkling skies!
2016-11-02 05:25:27
·
answer #3
·
answered by ? 4
·
0⤊
0⤋
our sun is not going to become a black hole is not big enough is just going to get big and red and eat us then is going to get small and then is going to turn white and super hot
black holes are real but it's created when a relly big star blows up and then gravity does something i forgot like it trys to push evrything in back togeather and makes a blackhole the gravity around it its so strong not even ligth could escape from being sucked in
(wow i am a nerd lol)
2007-02-03 04:59:09
·
answer #4
·
answered by Felipe 4
·
1⤊
0⤋
Sun was compressed to a radius of roughly three kilometers (about 1/232,000 its present size), the resulting gravitational field would create an event horizon around it, and thus a black hole.
A quantitative analysis of this idea led to the prediction that a stellar remnant above about three to five times the mass of the Sun (the Tolman-Oppenheimer-Volkoff limit) would be unable to support itself as a neutron star via degeneracy pressure, and would inevitably collapse into a black hole. Stellar remnants with this mass are expected to be produced immediately at the end of the lives of stars that are more than 25 to 50 times the mass of the Sun, or by accretion of matter onto an existing neutron star.
Stellar collapse will generate black holes containing at least three solar masses. Black holes smaller than this limit can only be created if their matter is subjected to sufficient pressure from some source other than self-gravitation. The enormous pressures needed for this are thought to have existed in the very early stages of the universe, possibly creating primordial black holes which could have masses smaller than that of the Sun.
Supermassive black holes are believed to exist in the center of most galaxies, including our own Milky Way. This type of black hole contains millions to billions of solar masses, and there are several models of how they might have been formed. The first is via gravitational collapse of a dense cluster of stars. A second is by large amounts of mass accreting onto a "seed" black hole of stellar mass. A third is by repeated fusion of smaller black holes. Effects of such supermassive black holes on spacetime may be observed in regions as the Virgo cluster of galaxies, for example, the location of M87 (see image below) and its neighbors.
Intermediate-mass black holes have a mass between that of stellar and supermassive black holes, typically in the range of thousands of solar masses. Intermediate-mass black holes have been proposed as a possible power source for ultra-luminous X ray sources, and in 2004 detection was claimed of an intermediate-mass black hole orbiting the Sagittarius A* supermassive black hole candidate at the core of the Milky Way galaxy. This detection is disputed.
The lower limit on the mass of a black hole comes from the quantum arguments. According to the most commonly accepted physics, one should not expect to observe black holes lighter than the Planck mass, or approximately 10-5 g, and even those would only exist for minuscule periods of time before evaporating. If true, this limit would rule out the possibility of creating miniature black holes in the laboratory in the foreseeable future: even today, center-of-mass collision energies of the world's most advanced particle accelerators are still 14-15 orders of magnitude lower than the Planck mass.
However, certain models of unification of the four fundamental forces do allow the formation of micro black holes under laboratory conditions. These postulate that the energy at which gravity is unified with the other forces is comparable to the energy at which the other three are unified, as opposed to being the Planck energy (which is much higher). This would allow production of extremely short-lived black holes in terrestrial particle accelerators. No conclusive evidence of this type of black hole production has been presented, though even a negative result improves constraints on compactification of extra dimensions from string theory or other models of physics.
2007-02-03 04:59:23
·
answer #5
·
answered by Anonymous
·
1⤊
0⤋
Yes,but our sun turns to a blackhole way.... after our time.The blackhole will be huge and suck up the Earth destroying every1 on it.
2007-02-03 05:58:37
·
answer #6
·
answered by Nicholais S 6
·
0⤊
2⤋