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Robert S. Ball
Star-land: Being Talks With Young People About the Wonders of the Heavens
Published by Good Press, 2021
EAN 4066338073730
Table of Contents
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LECTURE I. THE SUN.
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STAR-LAND.
LECTURE I.
THE SUN.
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The Heat and Brightness of the Sun—Further Benefits that we receive from the Sun—The Distance of the Sun—How Astronomers measure the Distances of the Heavenly Bodies—The Apparent Smallness of Distant Objects—The Shape and Size of the Sun—The Spots on the Sun—Appearances seen during a Total Eclipse of the Sun—Night and Day—The Daily Rotation of the Earth—The Annual Motion of the Earth round the Sun—The Changes of the Seasons—Sunshine at the North Pole.