The universe contains billions of galaxies, each with billions of stars. Our galaxy, the Milky Way, contains over 100 billion stars, including our Sun. The Earth and other planets orbit the Sun, forming the Solar System. The Solar System is made up of the Sun and eight planets, along with their moons, asteroids, comets and other small bodies. The document provides details about each planet's distance from the Sun and key facts about its rotation, orbit and composition.