Home, Sweet Home This title is about Earth, the planet we live on The layers of the Earth, how it relates to the other planets in our solar system, and how it is the only known planet to sustain life, as far as we know, are all discussed in this science title. Learn about how the Earth rotates on its axis, giving us day and night, and how it orbits and is warmed by that giant star we call the Sun. This book will allow students to make observations to determine the effect of sunlight on Earth's surface.