How is a nebula formed and what processes contribute to its creation in space?

Alright darling, listen up! A nebula is formed when a giant molecular cloud collapses due to gravity, creating a stellar nursery. Various processes like supernovae explosions, radiation from nearby stars, and shockwaves from star formation contribute to its creation in space. In simpler terms, it's a cosmic baby shower where stars are born - ain't that just out of this world?