By Sherman Hollar
Fathoming the boundlessness of area and the universe, we're instantly full of interest approximately our personal origins and sweetness in regards to the gadgets, lifestyles varieties, and subject that populate the cosmos. throughout the observations and paintings of astronomers over the years, we've got slowly been capable of lessen the variety of unknowns and enhance motives or theories for many of the celestial items and phenomena we see. This space-traveling survey recounts the various significant discovery milestones within the box of astronomy and examines the instruments and strategies presently utilized by astronomers to review the universe.
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Extra info for Astronomy. Understanding the Universe
Telescopes and other instruments aboard unmanned spacecraft have explored all the Sun’s planets at close range. At least as important, though, have been large telescopes placed in Earth orbit, above the obscuring and blurring effects of Earth’s atmosphere. The best known of these telescopes is NASA’s Hubble Space Telescope, which was launched in 1990 into an orbit 380 miles (610 kilometers) above Earth’s surface. 4-meter) primary mirror. In 1993 space shuttle astronauts installed corrective optics, and ever since it has returned magnificent data.
Scientists later developed the big bang theory. According to this theory, the universe started some 13 billion years ago with a sudden expansion of matter and antimatter. Many scientific tests have confirmed the validity of this theory. In this book, you will learn about important advances that astronomers have made through time. But you will also learn that astronomy is one of the few sciences in which amateurs can play a significant role. D. in physics to make a significant contribution. With the proper tools—including knowledge and a sharp eye—even an amateur can make an important discovery.
Includes bibliographical references and index. ISBN 978-1-61530-569-8 (eBook) 1. Astronomy--Juvenile literature. I. Hollar, Sherman. A88 2012 520—dc22 2011003489 On the cover, page 3: An open cluster of stars in the northern constellation of Perseus. com CONTENTS INTRODUCTION CHAPTER 1 THE VISIBLE SKY CHAPTER 2 TOOLS AND TECHNIQUES OF ASTRONOMY CHAPTER 3 THE SOLAR SYSTEM CHAPTER 4 THE UNIVERSE CHAPTER 5 THE HISTORY OF ASTRONOMY CHAPTER 6 AMATEUR ASTRONOMY CONCLUSION GLOSSARY FOR MORE INFORMATION BIBLIOGRAPHY INDEX introduction Millions of lucky people in Africa and Asia had the opportunity to witness an unusual celestial event on January 15, 2010.