Here's why:

* Sun's Size: Supernovas occur in stars much larger than our Sun. Our Sun is classified as a yellow dwarf star, which is relatively small.

* Fuel: Supernovas happen when massive stars run out of fuel, causing their cores to collapse under their own gravity. Our Sun doesn't have enough mass to undergo this process.

* Sun's Future: The Sun will eventually run out of hydrogen fuel and expand into a red giant, engulfing the inner planets. It will then shed its outer layers, becoming a white dwarf, a small, dense, and very hot object.

While the Sun won't go supernova, it will eventually run out of fuel and transition into a white dwarf, which is a significant change that will impact our solar system. However, this process will take billions of years.