Why does the sun remain stable over time?

Answer 1

The sun isn't an ordinary fire, but an ordinary fire can answer your question:

A fire keeps burning as long as it has fuel to burn. When the fuel runs out and

there's nothing left to burn, the fire goes out.

The sun is a nucleasr fusion reactor, pressing the nuclei of hydrogen atoms

together so hard that they 'fuse', which creates nuclei of helium and releases

energy in the process. The sun has been doing that for something like 3 or 4

billion years, and has fused something like 1/2 of the hydrogen it started with.

When the rest of the hydrogen is used up, in something like another 4 billion

years, the sun will either swell up, blow up, or go out.

Answer 2

In the long term, it will NOT remain stable. For example, it will eventually run out of fuel, and long before that happens, it will become a red giant.

In the short term, it works something like this: if a star like the Sun contracts too much, its gas pressure and temperature will increase; this will increase nuclear fusion, and thus the radiation pressure. This will make it expand again. If it expands too much, it is just the other way round - nuclear fusion will decrease... etc.

As a result, in general terms, it tends to remain in an equilibrium size (and power output). However, note that many stars pulsate, which means that they seem to expand and contract regularly - around such an equilibrium point, similar to a pendulum that moves past its equilibrium point and then goes back again!

Answer 3

The Sun remains stable over time due to a balance between the inward force of gravity and the outward force of nuclear fusion. Gravity pulls everything inward, while nuclear fusion in the Sun's core generates energy that creates an outward pressure, maintaining the Sun's stability.

Answer 4

The fusion of hydrogen into helium occurs because of gravitational force. Energy is released across the E-M spectrum part of which is visible light.

Answer 5

gravitational pull keeps it there and its shape now that u know why the hell did u wanna know that that is jus common knowledge

Answer 6

any life on any planet has to give off energy and when they do an invisible force will push it to the sun and the sun will digest it and will get more energy

Answer 7

Gravity. Any object above a certain mass will maintain a more or less spherical shape, due to gravity.

Answer 8

Gravity.