Final answer:
Stars die because they run out of nuclear fuel, leading to a collapse under their own gravity. The material from dead stars is recycled in the galaxy, contributing to the birth of new stars and celestial bodies.
Step-by-step explanation:
Every star will eventually die because it runs out of nuclear fuel. Stars generate energy through the process of nuclear fusion, which requires fuel such as hydrogen and helium. When a star exhausts its fuel supply, it no longer has the means to produce the necessary energy to counteract gravitational forces. Without this internal pressure, the star collapses under the weight of its own layers, leading to its death. The way a star ends its life can vary; some may explode in a supernova, while others become white dwarfs and fade away more quietly.
The atoms that make up our bodies were once part of these stars. Underscoring the cosmic cycle of birth and death, the material from expired stars is recycled throughout the galaxy, contributing to the formation of new stars and other celestial bodies. Understanding the life cycles of stars helps us comprehend the vast and dynamic nature of the universe, as well as our place within it.