Copyright, 1921, by
The Century Company
Copyright, 1922, by
Duffield and Company

Printed in U. S. A.


CONTENTS

CHAPTER PAGE
[Preface]xiii
I.[The Constellations]3
II.[January]15
III.[February]21
IV.[March]28
V.[April]35
VI.[May]41
VII.[June]49
VIII.[July]56
IX.[August]64
X.[September]71
XI.[October]78
XII.[November]84
XIII.[December]90
XIV.[Stars of the Southern Hemisphere]96
XV.[The Milky Way or Galaxy]107
XVI.[The Surface of the Sun]113
XVII.[The Solar System]119
XVIII.[The Origin of the Earth]127
XIX.[Jupiter and His Nine Moons]139
XX.[The Rings and Moons of Saturn]148
XXI.[Is the Moon a Dead World]156
XXII.[Comets]165
XXIII.[Meteorites]173
XXIV.[The Earth As a Magnet]183
XXV.[Some Effects of the Earth's Atmosphere Upon Sunlight]193
XXVI.[Keeping Track of the Moon]207
XXVII.[The Motions of the Heavenly Bodies]216
XXVIII.[The Evolution of the Stars—From Red Giants to Red Dwarfs]225
XXIX.[Double and Multiple Stars]230
XXX.[Astronomical Distances]241
XXXI.[Some Astronomical Facts Worth Remembering]250

ILLUSTRATIONS