Stars have extremely interesting lives! At the beginning of a star’s life, they are born in clouds made of dust and gas. These clouds are called nebulae. At this time, gravity pulls part of the nebula together into a spinning hot ball. This is the star, and it starts to glow because of its high temperature. Throughout the life of a star, the size and temperature of it changes throughout the many years that the star can live. Some stars, when they die, puff out and expand. They are now red giants. When a red giant cools off, it will shrink and become a white dwarf. Stars can live for millions and even trillions of years. Can you believe how fascinating the life of just one star can be?