2006-09-19 06:49:27 · 7 answers · asked by Anonymous in Science & Mathematics ➔ Astronomy & Space
when they are spent and can no longer support the fusion reaction that powers them.
2006-09-19 06:52:16 · answer #1 · answered by vanman8u 5 · 1⤊ 0⤋
Many of them already have. But it takes millions of years in some cases for that light to reach earth, so while the star died a long time ago, we still see it as if it were alive, we are essentially seeing into the past.
At the same time, stars are being created, but it will be thousands or even millions of years before we see them because of the distance the light needs to travel.
2006-09-19 13:58:14 · answer #2 · answered by shadow_boy42 2 · 0⤊ 0⤋
In stars there are two types of forces- gravitational force trying to pull all the gases together, and pressure from the fusion reaction that is not allowing gravity to predominate. As the fuel burns out, the second force decreases. So stars collapse under their own weight.
Larger stars burn out their fuel faster (to create enough pressure to counter the large gravitational force), so they last shorter.
2006-09-23 12:51:44 · answer #3 · answered by astrokid 4 · 0⤊ 0⤋
I remember when I was little, being told that even once a star actually does burn out, you would still see the light (for a long time) because it takes so long for the light to travel towards the Earth, into our viewing capability.
2006-09-19 13:53:09 · answer #4 · answered by Andy Panda 1 · 0⤊ 0⤋
Star ends its life as a cold dead lump of mass when it has expended all its fuel that supports the fusion reaction. Devoid of energy it looses its ability to give light and heat and can no longer be viewed by us.
2006-09-19 13:59:04 · answer #5 · answered by openpsychy 6 · 0⤊ 0⤋
When they make lame one lame movie after another.
2006-09-19 14:07:19 · answer #6 · answered by Anonymous · 0⤊ 0⤋
When entropy reaches its maximum.
2006-09-19 13:58:43 · answer #7 · answered by zmes_matt 3 · 1⤊ 0⤋