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Originally Posted by Tiny Bronco
9. A Super Nova is when a star collapses on itself because it has run out of feul and then Exploooooodes
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Only the biggest stars end their lives in a Super Nova. A small or medium sized star (such as our sun) will not end in a Super Nova. These will, when they dont' have enough hydrogen to sustain the hydrogen fusion anymore, start to fusion helium into yet heavier elements, causing the star to grow immensly and turn red, a so-called red giant. This process will continue, fusioning heavier and heavier elements, but eventually when there is no more fuel, the outer layers will be ejected into space as a planetary nebulae (an expanding ring, or rather sphere, of gas), and the core is all that remains basically. The remains is called a white dwarf, and will slowly cool off over a course of billions of years
