![]() ![]() Time Conversions 3.1 Defining a Day 3.2 Defining a Month 3.3 Defining a Year 3.4 Defining Time of Day 3.5 Calendar Systems 3.6 Julian Day Numbers 3.7 Some Calculations with Dates 3.8 LCT to UT 3.9 UT to LCT 3.10 UT to GST 3.11 GST to UT 3.12 GST to LST 3.13 LST to GST 3.14 Program Notes 3.15 ExercisesĢ1 22 25 26 27 38 40 44 46 46 47 48 49 50 50 51 Unit Conversions 2.1 Some Preliminaries 2.2 Measuring Large Distances 2.3 Decimal Format Conversions 2.4 Program Notes 2.5 Exercises Introduction 1.1 Accuracy 1.2 Other Notes 1.3 Layout of the Book 1.4 Program Notes David, what would you have thought about the amazing universe in which we live? J. ![]() Mary Ann, as always, your steadfast support has been the single most important factor contributing to the completion of this project. Because you rescued my brothers and me, I know the great debt I owe and can only offer only gratitude in return. Accordingly, this book was not written by a professional or even by an amateur astronomer, but rather it was written from the perspective of an amateur “amateur astronomer.” This book is most especially dedicated to Mom and Dad for all your years of encouragement and sacrifice. This book is dedicated to all of us “armchair explorers” who look up into the night sky and are filled with curiosity and a burning desire to understand a little better how the universe in which we live appears to operate. Unfortunately, most of us will have to be content with imaginary journeys. Perhaps well before the end of this century some lucky explorers will have visited Mars or some other planet within our Solar System. When I consider thy heavens, the work of thy fingers, the moon and the stars, which thou hast ordained What is man, that thou art mindful of him? and the son of man, that thou visitest him? -Psalm 8:3-4, KJVĪlthough space travel on a limited scale is an accomplished fact, we are presently an Earthbound race whose minds yearn to explore the cosmos. 元9 2019 | DDC 523-dc23 LC record available at 10 9 ![]() paper) Subjects: LCSH: Astronomy-Amateurs’ manuals. Description: Cambridge, MA : The MIT Press, | Includes bibliographical references and index. Title: Celestial calculations : a gentle introduction to computational astronomy / J. Library of Congress Cataloging-in-Publication Data Names: Lawrence, J. Source code and executables for the programs described in this book can be downloaded from. Printed and bound in the United States of America. This book was set in Times by Westchester Publishing Services. No part of this book may be reproduced in any form by any electronic or mechanical means (including photocopying, recording, or information storage and retrieval) without permission in writing from the publisher. The MIT Press Cambridge, Massachusetts London, EnglandĬ 2018 Massachusetts Institute of Technology All rights reserved. Celestial Calculations A Gentle Introduction to Computational Astronomy ![]()
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