The Sun is the heart of our solar system. It provides the light and heat that make life possible on Earth, drives our planet’s climate, and influences the movement of every planet, asteroid, and comet around it. For billions of years, the Sun has burned steadily, appearing constant and eternal from the perspective of human history. Yet despite its immense power and seemingly endless energy, the Sun will not last forever. Like every star in the universe, it has a life cycle. It was born, it is currently in a stable middle age, and one day it will die.