What Does PN Stand For?
PN stands for Planetary Nebula
A Planetary Nebula (PN) is an astronomical phenomenon that occurs at the end stage of a medium-sized star's life cycle. This nebula forms when a star exhausts its nuclear fuel and expels its outer layers, creating a shell of ionized gas that glows due to ultraviolet radiation from the remaining core, or white dwarf. Planetary nebulae are often characterized by their intricate shapes and vibrant colors, serving as vital contributors to the chemical enrichment of the interstellar medium.
Added on 14th April 2008 | Last edited on 16th June 2025 | Edit Acronym