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After a massive star fuses all the hydrogen in its core into helium, it contracts until the pressure builds up so much that heavier elements start to fuse, all the way up to iron. When the star reaches this point, all fusion in the core stops because elements heavier than iron cannot be created in this manner. Since there is no more fusion going on to maintain the outward pressure, the massive core contracts very suddenly into a ball of neutronium (a neutron star). The outer layers of the star collapse onto the core with great force, and this causes a supernova explosion (and the supernova creates elements heavier than iron). Afterwards, you might be left with just a neutron star, or if the original star had enough mass, a black hole.

2007-05-24 15:11:41 · answer #1 · answered by Nature Boy 6 · 0 0

Here, i think i can answer, but what do you mean by "goes through".
here, ok, i found it.
1. A supergiant starts to colapse.
2. iron starts to form at the center because nuclear fusion canot create elements heaveir than iron so it builds up.
3. outer layers of core collapse inward because the iron core reaches 1.4 solar mass and cant support its own weight.
4. black hole forms when it explodes creating a rift in space.

2007-05-24 22:00:21 · answer #2 · answered by Johnson 2 · 0 0

Hi. Try this site: http://www.answers.com/main/ntquery?s=supernova&gwp=13

2007-05-24 21:58:29 · answer #3 · answered by Cirric 7 · 0 0

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