Why do we have night and day?

"This title explores the relationship between Earth and the Sun. Readers will learn how and why Earth orbits the Sun, as well as the materials that make up the Sun. Readers will find answers to questions such as 'Do other planets have nights and days?' and 'Where do stars go in the daytime?' Easy-to-understand diagrams and text explain these quite complex scientific points in an age-appropriate and dynamic way. Hands-on science projects allow readers to create their own exciting experiments. Sidebars add useful information to enhance readers' understanding"--Provided by the publisher.