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©2016 by Mason Crest, an imprint of National Highlights, Inc. All rights reserved. No part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopying, recording, taping, or any information storage and retrieval system, without permission from the publisher. Printed and bound in the United States of America. First printing 1 3 5 7 9 8 6 4 2 Library of Congress Cataloging-in-Publication Data The science of space. pages cm. — (Science fundamentals) Includes bibliographical references and index. ISBN 978-1-4222-3515-7 (hc) — ISBN 978-1-4222-8335-6 (ebook) 1. Space and time—Juvenile literature. 2. Space sciences—Juvenile 3. literature. Outer space—Exploration—Juvenile literature. QC173.59.S65 S43 2017 523—dc23 2015035345 Science Fundamentals Series ISBN: 978-1-4222-3512-6

SCIENCE FUNDAMENTALS

THE SCIENCE OF ENERGY THE SCIENCE OF LIFE THE SCIENCE OF SPACE THE SCIENCE OF TIME PICTURE CREDITS

Page: 5, 6, 8, 9, 38: Used under license from Shutterstock, Inc.; 10: Bibliothèque Nationale, Paris); 13, 14, 15, 16, 20, 21, 25, 26: Wellcome Library, London; 22, 35: NASA; 27: T.A. Rector (NOAO/AURA/NSF) and Hubble Heritage Team (STScI/AURA/NASA); 30: NASA/JPL-Caltech/ESA/Harvard-Smithsonian CfA, 31: NASA & ES, 32: NASA/JPL-Caltech 33: NASA/ESA/Hubble, 39: NASA / WMAP Science Team, 40: Danor Aharon / Shutterstock.com Vector Illustrations: 7,12, 19, 23, 29, 37, 43: rzarek/Shutterstock.com Background Images: 2, 6, 18, 30, 46: TairA/Shutterstock.com; 8, 22, 28, 34, 38: getvitamin/Shutterstock.com; 10, 16, 24, 36, 40: jupeart/Shutterstock.com; 13, 27, 45: Maria Starovoytova/Shutterstock.com; 14, 21, 32, 42, 48: dalmingo/Shutterstock.com