: Astronomy in a nutshell by Serviss Garrett Putman - Astronomy Juvenile literature

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PART I--THE CELESTIAL SPHERE.

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PART II--THE EARTH.

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Nature, Shape, and Size of the Earth--The Polar 67-123 Compression and Equatorial Protuberance, and their Cause--The Attraction of Gravitation--The Mass of the Earth: how Found--How the Earth Holds the Moon, and the Sun the Planets--The Tides--How the Moon and Sun Produce Tides--Spring Tides and Neap Tides--The Atmosphere--The Law and Effects of Refraction--Dip of the Horizon--The Aberration of Light--Time: how Measured--Sidereal, Apparent Solar, and Mean Solar Time--The Clock and the Sun--Day and Night--Where the Days Begin--The Seasons--Effects of the Varying Declination of the Sun--Polar and Equatorial Day and Night--The Tropics and the Polar Circles--Inequality of Length of the Seasons--When the Seasons in the Two Hemispheres will be Reversed--The Calendar, the Year, and the Month--Reformations of the Calendar--Different Measures of the Month

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The Sun--Distance, Size, and Condition of the 127-215 Sun--Temperature of the Sun--Solar Heat on the Earth, and its Mechanical Equivalent--Peculiar Rotation of the Sun--Sun-spots, their Appearance and Probable Cause--Faculae--The Photosphere--Solar Prominences--Explosive Prominences--The Solar Corona--Parallax, and the Measure of Distances--Spectroscopic Analysis--How the Elements in the Sun Reveal their Presence--List of the Principal Solar Elements--The Moon--Origin of the Moon--Appearance of its Surface--Gravity on the Moon--The Phases of the Moon--Causes of the Absence of a Lunar Atmosphere--Eclipses--How the Moon Causes Eclipses of the Sun--The Laws Governing Eclipses--The Shadow during a Solar Eclipse--Eclipses of the Moon--Number of Eclipses in a Year--The Saros--The Planets--Kepler's Laws of Planetary Motion--Mercury--Venus--Mars, and its So-called Canals--Theories about Mars--Jupiter, its Belts and its Satellites--The "Great Red Spot"--Saturn, its Rings and its Satellites--Composition of the Rings--Uranus and Neptune--Comets, and the Laws of their Motion--Composition of Comets--The Pressure of Light and its Connection with Comets' Tails--Breaking up of Comets--Meteors and their Relations to Comets--The November Meteors and Other Celebrated Showers--Meteorites or Bolides which Fall upon the Earth--The Question of their Origin

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Division of the Stars into Magnitudes--Division of 219-257 the Stars according to their Spectra--Stars Larger and Smaller than the Sun--The Distances of the Stars--Variable Stars--Double and Binary Stars--Spectroscopic Binaries and how they are Discovered--Proper Motions of the Stars--Number of the Stars--New, or Temporary Stars--The Milky Way--The Nebulae--The Two Kinds of Nebulae--Spiral Nebulae--The Nebular Hypothesis--Applications of Photography to Stars and Nebulae--The Constellations--How to Learn the Constellations--Their Antiquity--Description of the Principal Constellations Visible from the Northern Hemisphere at Various Times of the Year

INDEX 259

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PHOTOGRAPH OF SOUTH POLAR 8 REGION OF THE MOON

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