* Sun's Size: Our Sun is a relatively small star, classified as a yellow dwarf. Supernovae happen in stars at least eight times more massive than our Sun.
* Sun's Fuel: The Sun's primary fuel is hydrogen. It fuses hydrogen into helium, releasing energy in the process. When it runs out of hydrogen, it will start fusing helium. However, it's not massive enough to fuse heavier elements like carbon and oxygen, which is necessary for a core collapse supernova.
* Sun's Fate: In about 5 billion years, the Sun will run out of hydrogen fuel. It will expand into a red giant, engulfing the inner planets (including Earth). Eventually, it will shed its outer layers, forming a planetary nebula. The core will collapse into a white dwarf, a dense, hot remnant that slowly cools over time.
In short, our Sun will not explode in a spectacular supernova. It will have a much gentler, but equally dramatic, end.
