how does the sun resist collapsing under its own gravitation attraction?
828693
During most of the lifetime of a star, it neither expands nor contracts.  The gravitational attraction is balanced by internal pressure.  The internal pressure in our Sun comes from the density and temperature of the particles (atomic nuclei and electrons) in the plasma.\n\nThe temperature is maintained by the energy released by nuclear fusion in the core.  If this fusion stopped, the interior of the Sun would cool over a period of about a million years, and it would begin to contract.  (Once it contracted enough, it would begin to fuse helium instead of hydrogen and it would re-expand.)
99768
Sort of!  As the sun slowly runs out of (mostly hydrogen) fuel, it will expand into a red giant and it's radius will be greater than the current position of the Earth.  However, the Earth's orbit is currently projected to move farther out while this happens so our planet will not actually be engulfed by the sun.  It will, however, experience a very large temperature increase.
330944
A black hole is a very large star, many times more massive than our Sun, that has collapsed under its own gravity (Usually, the star doesnt collapse because the nuclear reactions occuring in its core counter the gravitational force) The gravitational field around a black hole is so strong that not even light can escape
637323
The Sun does rotate/turn on an axis by itself, but it also rotates around a huge black hole in the center of our galaxy, and it takes a very, very, VERY long time to complete one rotation.\n\nIt rotates around the black hole with similar principles to that of earth revolving around the sun, and yes, eventually it will be swallowed by the black hole.
441723
Gravity is ALWAYS attractive.  Every bit of matter in the universe is attracted to every other bit of matter via gravity.  The only reason everything doesn't collapse in on itself is that there are other forces besides gravity.  If you want to escape Earth's gravity, you have to be far enough away that you are more attracted by everything else in the universe.
128958
To simply, the sun is basically a gigantic collection of hydrogen gas that is being pushed together by an enormous force of gravity (each particle of hydrogen gas attracts each other).  When those atoms are forced together, they interact to form a continuious nuclear reaction which effectivly acts as a counter-force to the force of gravity.  So: Gravity pushes in, a nuclear explosion pushes out and the particles come to an equilibrium giving the sun a particular size.\n\nAs a star grows older, it begins to exhaust its supply of hydrogen fuel for the nuclear reaction and increases in size while decreasing in temperature.  At some point in the lifecycle of our sun, its size will actually expand to include the current position of the Earth.  However, current models indicate that Earth will move farther out in orbit, preventing its engulfment and destruction.\n\nAt any rate, as _our_ star (the Sun, sometimes called "Sol") continues to grow older, it will eventually shed these outer layers (thus creating a nebula) and condense into a very dense core and over time radiate away its energy.\n\nVery large stars can form black holes or neutron stars, regions of extreme gravitational forces, but our sun is small enough that it will form neither of these and just cool down into an inert ball of chemicals, no longer shining after it has radiated away its energy.\n\nHope that is helpful.
319780
Yes, the Sun revolves around it's own axis, just like the Earth.  It spins around every 27 days.  It just doesn't ORBIT anything.\n\nedit: actually, it orbits the galaxy.  Takes a few hundred million years.
572377
There is an interaction between atoms in a mass structure.\nGravity tends to push the atoms together and temperature keeps them apart.So there is an equilibrium maintained so that the mass keeps a certain shape at a particular temperature.\nAt zero degree absolute theorethically there is no temperature to keep the atoms apart.So the atoms should actually touch. However be cause of the space substance between the atoms gets compressed,a reaction occurs and reversed gravity takes place.That is the reason why atoms can never actually kiss.\nThen there is a state where atoms get ionized becaus of high temperature.Here the electrons are pushed away from the atoms. This state is called plasma. This occurs in the Sun.\n\nAs far as black holes are concerned it is a debatable theory which brings doubt how mass structure can exist \nwithout electrons. The Idea came from solutions of Einsteins field equation. Its only a mathematical solution ,whether it represents reallity is a matter of interpretation.
49395
There is a confusion about magnetic attration and gravity attraction. First of all,nothing has been proven to show that there is something in the earth that pulls you down.It makes more senseto believe that gravity is an external phenomena rather than an internal one.\n\nThere is no magnetic response unless two poles exist in a material. In this case we have an internal phenomena which has to do the atomic structure of the material which forms\nan external circuit of twisted space. It requires two opposite ends to observe a magnetic response. The poles of a material which is magnetized can exhibit both attraction and repulsion.\nMost material display some magnetism.\nFerrous material are able to store magnetic power more so than other material because of the arrangement of their electronic structures.\n\nIt is believed by scientists that  the magnetism of the earth is caused by a molted iron core;however ,it has\nbeen shown that at high temperature a magnetic field cannot be established.\n\nThe best explanation presented was that the earth magnetic field is caused by the motion of the ocean around the earth.
279164
Our sun will never go supernova or form a black hole. It doesn't have enough mass for that. It will, however, become a red giant and eventually cool down as others here have pointed out.
828930
it compresses itself then collapes into itself creating intense gravitational pull
876446
The sun rotates on its own axis that what causes the gavational pull to keep the planets moving around it.
463132
Yes,it exerts gravitational pull and it is due to this gravitational pull all the planets are revolving around the sun in fixed orbits.
359720
throughout a stars life-cycle, it is constantly heating materials (hydrogen and iron) and pushing them to the surface to cool, and to the center to heat up and melt.\nThis is part of nuclear fission.\n\nafter a very long time, the sun starts to lose energy, and cant push the iron up from its core and gradually grows larger, turning red (hence red giant),\nEventually, the pressure from its mass, and it's failure to push it all away from its core will result in the star collapsing into itself, potentially turning into a black hole.
1152307
...when it has degenerated & becomes dead.\n\nA white dwarf is what stars, like our Sun, become when they have exhausted their nuclear fuel. Near the end of its nuclear burning stage, such a star expels most of its outer material (creating a planetary nebula), until only the hot core remains, which then settles down to become a very hot (T > 100,000K) young white dwarf. Since a white dwarf has no way to keep itself hot unless it is accreting matter from a nearby star (see Cataclysmic Variables), it cools down over the course of the next billion years or so. Many nearby, young white dwarfs have been detected as sources of soft X-rays (i.e. lower-energy X-rays); recently, soft X-ray and extreme ultraviolet observations have become a powerful tool in the study the composition and structure of the thin atmosphere of these stars.\n\nA typical white dwarf is half as massive as the Sun, yet only slightly bigger than the Earth. This makes white dwarfs one of the densest forms of matter, surpassed only by neutron stars.\n\nBecause a white dwarf is no longer able to create internal pressure, gravity unopposedly crushes it down until even the very electrons that make up a white dwarf's atoms are mashed together. In normal circumstances, identical electrons (those with the same "spin") are not allowed to occupy the same energy level. Since there are only two ways an electron can spin, only two electrons can occupy a single energy level. This is what's know in physics as the Pauli Exclusion Principle. And in a normal gas, this isn't a problem; there aren't enough electrons floating around to completely fill up all the energy levels. But in a white dwarf, all of its electrons are forced close together; soon all the energy levels in its atoms are filled up with electrons. Well, if all the energy levels are filled, and it is impossible to put more than two electrons in each level, than our white dwarf has become degenerate. For gravity to compress the white dwarf anymore, it must force electrons where they cannot go. Once a star is degenerate, gravity cannot compress it any more because quantum mechanics tells us there is no more available space to be taken up. So our white dwarf survives, not by internal combustion, but by quantum mechanical principles that prevent its complete collapse.\n\nDegenerate matter has other unusual properties; for example, the more massive a white dwarf is, the smaller it is! This is because the more mass a white dwarf has, the more its electrons must squeeze together to maintain enough outward pressure to support the extra mass. There is a limit on the amount of mass a white dwarf can have, however. It was found by Subrahmanyan Chandrasekhar to be 1.4 times the mass of our Sun, and is is call the "Chandrasekhar limit" after its discoverer. \n\nWith a surface gravity of 100,000 times that of the earth, the atmosphere of a white dwarf is very strange. The heavier atoms in its atmosphere sink and the lighter ones remain at the surface. Some white dwarfs have almost pure hydrogen or helium atmospheres, the lightest of elements. Also, the very strong gravity pulls the atmosphere close around it in a very thin layer, that, if were it on earth, would be lower than the tops of our skyscrapers! \n\nUnderneath the atmosphere of many white dwarfs, scientists think there is a 50 km thick crust, the bottom of which is a crystalline lattice of carbon and oxygen atoms. One might make the comparison between a cool carbon/oxygen white dwarf and a diamond! (After all, a diamond is just crystallized carbon!)
463963
I would say false.  The gravitational pull of the sun would pull it to it's doom.
65546
A supernova is the death of a supermassive star.  Our sun converts Hydrogen into Helium right now.  When all or most of the Hydrogen has been converted, the Sun will heat up and start fusing Helium atoms together.  The Sun will continue to fuse heavier and heavier elements until it gets to Iron.  The increase in energy needed here is too great.  Our sun is average, it won't Supernova.  Much more massive stars when they reach this point collapse in on itself because there is no nuclear furnace keeping gravity in check.  The resulting explosion releases massive amounts of energy, creates elements heavier than Iron, and leave either a nuetron star or a black hole where the original star used to be