Here's why:
* Planets are not massive enough to go supernova. Supernovae occur when a star runs out of nuclear fuel and collapses under its own gravity. Planets, even giant planets like Jupiter, are far less massive than stars and lack the internal processes needed to fuse elements and produce energy like stars do.
* Planets are not stars. Planets are celestial bodies that orbit stars. They do not have their own internal fusion reactions and are not massive enough to become stars.
In summary:
* Supernovae are a phenomenon that happens to stars.
* Planets are much smaller and less massive than stars.
* Planets do not have the necessary conditions to undergo a supernova.