Why Should a Star or even one like Our Sun collapse?

Question

Wouldnt the Universe then be filled with a bunch of collapsed stars which would no longer be sheding light?

Answer 1

Their materials collect together (via gravity) and make new stars. Granted, they tend to be made of heavier materials and burn cooler (often red).

Stars collapse when they run out of material. A star begins by fusing hydrogen into helium. Eventually, the hydrogen runs out and the star begins to collapse until it is able to fuse helium into carbon. This continues through various elements until it is largely iron. A star is simply not able to fuse iron into anything else (their not massive enough), so it eventually has a final collapse, sometimes into a supernova.

This final collapse can leave three possible "leftovers":
1. A white dwarf - if the star is less than 3 x the mass of our sun, then the core will be left as a burning ember. Eventually it will burn out to become something known as a brown dwarf, a dead star.

2. A neutron star - if the star is between 3 and 10 (I think) x the mass of our sun, the explosion compresses the core down enough that protons and electrons are crammed together to form a neutron star. It's a bunch of neutrons so dense a teaspoonful would weigh, well, tons on the earth.

3. A black hole - if the star is especially massive, the collapse never ends. The core itself cannot overcome the massive gravity that is created by a now extremely dense remnant, forming a black hole.

Answer 2

To be a little more precise...start live most of their lives in an equalibrium. Due to their great mass, gravity wants to collapse them down. The pressure resulting from the nuclear reactions in the core want to expand them. These two forces find a ballance and as long as the core has fuel to burn, the sun is stable. When the core runs out, the inevitable collapse continues. How the star ends up depends on it's mass.

Answer 3

hi. each and every celebrity starts off out with a large yet limited volume of gasoline, often hydrogen. The celebrity might fall down precise away if the hydrogen fusion did no longer warmth the interior adequate to surrender the contraction. It does for a at the same time as yet at last gravity wins and the celebrity collapses.

Answer 4

The sun is burning gas. Or mabey something no one knows. But once all the burning gas goes out then there is nothing to burn thus resulting in a dying star. And the world would freeze to death. Unless.. We develope super giant heaters. Ya right.