With facts about the sun's strength, the speed at which it travels, and more, this volume follows the pattern of the sun from dawn to dusk. Children discover how light rays travel out from the sun, how shadows are formed, how the moon lights up night sky and how the Earth orbits the sun once every year. There is also an experiment to make a sundial. This volume is part of a series which uses cartoon-style illustrations and speech bubbles to make scientific ideas easier to understand. Fact boxes, a themed experiment, a list of related Web sites and an index are also included.