Patterns in the Sky Lessons 1–2 CXECA08ARD304_LLR_CVa.indd 3 2/22/06 2:28:49 PM NOTE: In 2006, scientists from the International Astronomical Union classified Pluto as a “dwarf planet.” However, not all scientists agree with the decision. Use the Internet or current newspaper and magazine articles to find the latest information about the planets. Copyright © by Harcourt, 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 photocopy, recording, or any information storage and retrieval system, without permission in writing from the publisher. Requests for permission to make copies of any part of the work should be addressed to School Permissions and Copyrights, Harcourt, Inc., 6277 Sea Harbor Drive, Orlando, Florida 32887-6777. Fax: 407-345-2418. HARCOURT and the Harcourt Logo are trademarks of Harcourt, Inc., registered in the United States of America and/or other jurisdictions. Printed in the United States of America ISBN-13: 978-0-15-349167-2 ISBN-10: 0-15-349167-1 1 2 3 4 5 6 7 8 9 10 179 15 14 13 12 11 10 09 08 07 06 If you have received these materials as examination copies free of charge, Harcourt School Publishers retains title to the materials and they may not be resold. Resale of examination copies is strictly prohibited and is illegal. Possession of this publication in print format does not entitle users to convert this publication, or any portion of it, into electronic format. CXECA08ARD304_LLR_CVa.indd 4 10/6/06 10:02:28 AM Patterns in the Sky Lessons 1–2 Lesson 1 What Planets Orbit the Sun? . . . . . . . . . . 2 Lesson 2 What Patterns Do Earth and the Sun Follow? . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Visit The Learning Site! www.harcourtschool.com CXECA08ARD3041-2_BLR.indd 1 2/23/06 1:51:32 PM 1 VOCABULARY planet orbit telescope moon solar system What Planets Orbit the Sun? A planet is a large object in space that travel