Facts101 is your complete guide to Science of Earth Systems. In this book, you will learn topics such as The Earth as a Planet . . ., The Moon: Earth`s Closest Neighbor, The Life of Stars, and The Solar System and Its Place in the Universe plus much more. With key features such as key terms, people and places, Facts101 gives you all the information you need to prepare for your next exam. Our practice tests are specific to the textbook and we have designed tools to make the most of your limited study time.