What Makes Day and Night

'Accompanied by NASA photographs and Dorros's colorful, lively drawings, the text explains the Earth's rotation in clear and simple terms. An experiment using a lamp as the 'sun' further clarifies the principles introduced.' —BL.

Author Biography: Franklyn M. Branley is the originator of the Let's-Read-and-Find-Out Science series and the award-winning author of over 140 popular books for readers of all ages. He is Astronomer Emeritus and former Chairman of the American Museum-Hayden Planetarium. Dr. Branley lives in Brunswick, Maine.