A solar system is a group of planets, meteors, or other objects that orbit a large star. Our solar system includes everything that is gravitationally drawn into the sun's orbit. While there are at least 200 billion other stars in our galaxy, the sun is the center of Earth's solar system. Astronomers have discovered there are many other large stars within our galaxy, the Milky Way. Use these resources to teach students about the objects and relationships within our solar system.