So Lets Shaft Our Farmers.....
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(1) How does a sun become a sun? (2) Why is it that when a sun has nothing left to burn it just doesn't go out like a match? It goes super nova or just nova. (3) Can a sun prematurly be extinguished? Can A planet become a sun? Like earth, could earth become a sun?
Thanx all
No best answer has yet been selected by kermit911. Once a best answer has been selected, it will be shown here.
For more on marking an answer as the "Best Answer", please visit our FAQ.1) As pointed out it's all a matter of size, Jupiter is often referred to as a failed sun. In other words when the solar system was forming it did not get big enough to ignite. Often planets do and you get a binary or tertiary with two or more suns orbiting each other
2) Again BobJim's right Our sun is nowhere large enough to go suprenova. After it becomes a Red Giant it will shink back and fade away.
Incidently a nova is not just a dim supernova here's a page explaining the difference:
http://imagine.gsfc.nasa.gov/docs/ask_astro/answers/980202c.html
3) I don't think a sun could prematurly be extinguished other than by extreme events such as a companion star becoming a black hole or netron star and colliding with it.
Earth could not now become a sun there is not enough matter for it to attract . As I mentioned a planet is in effect a wannabe star.