How Do Stars Die and What Happens to Their Remains?

Stars live long, bright lives, but even they must eventually die. Imagine a giant balloon that keeps getting bigger and bigger until it can’t hold any more air, then poof! It explodes or collapses into something small and dense. That’s what happens to stars when they run out of energy. Some become big, glowing clouds called nebulae, while others turn into tiny but super-heavy objects like white dwarfs or even black holes.