Incorporates data collected by the Viking, Mariner, Voyager, Pioneer, and Russian space missions and is accompanied by spectacular photographs.

The family from Secrets of the Garden are back in a new book about backyard science that explains why the seasons change. Alice and her friend Zack explore the reasons for the seasons. Alice's narrative is all about noticing the changes as fall turns into winter, spring, and then summer. She explains how the earth's yearlong journey around the sun, combined with the tilt in the earth's axis, makes the seasons happen. Alice's text is clear and simple, and experiential. Two very helpful—and very funny—chickens give more science details and further explanation through charts, diagrams, and sidebars. Packed with sensory details, humor, and solid science, this book makes a complicated concept completely clear for young readers—and also for the many parents who struggle to answer their kids' questions! "Several adults of my acquaintance . . . would find Secrets of the Seasons to be an eye-popping revelation." —John Lithgow, The New York Times Book Review

" ... Concise explanations and descriptions - easily read and readily understood - of what we know of the chain of events and processes that connect the Sun to the Earth, with special emphasis on space weather and Sun-Climate."--Dear Reader.

Contains 250 questions and answers about astronomy, particular for the amateur astronomer.

The Discworld is an unpredictable place, what with rivers you can skateboard across (if they weren't so knobbly), rocks that like a stroll about of an evening and points of raw magic that can turn a body inside out soon as look at it. For safety's sake, you need a guide! The DISCWORLD COMPANION contains everything you need to know about the Discworld. This edition, the first major revision since HOGFATHER was published (1997), will cover the eight DISCWORLD novels from JINGO onwards, including THE LAST HERO and MAURICE AND HIS AMAZING EDUCATED RODENTS, as well as the Diaries, the plays and other Discworld Spinoffery.

Controversial at the time, Copernicus's discoveries led to the scientific revolution, and a greater understanding of our place in the universe. An accessible, abridged edition with a new introduction. Renaissance Natural philosopher Nicolaus Copernicus's pioneering discovery of the heliocentric nature of the solar system is one of the few identifiable moments in history that define the understanding of the nature of all things. His great work was the consequence of long observation and resulted in the first stage of the Scientific Revolution by correctly positing that the earth and other planets of the solar system revolved around the sun. Not only did this promote further study to understand the place of humanity in the world and the universe, it questioned the authority of the organised Christian Church in the West to be the keeper of fundamental truths. Ultimately this would lead to the Enlightenment, and the separation of religion, government and science. The FLAME TREE Foundations series features core publications which together have shaped the cultural landscape of the modern world, with cutting-edge research distilled into pocket guides designed to be both accessible and informative.

The phases bring the Moon to life and highlight the complex moonscape of hills and ridges and dark and light areas. This book is designed to give you the basics about the craters that are found on the Moon.