Оглавление
Isabel Martin Lewis. Astronomy for Young Folks
Astronomy for Young Folks
Table of Contents
PREFACE
I. THE CONSTELLATIONS
II. JANUARY
III. FEBRUARY
IV. MARCH
V. APRIL
VI. MAY
VII. JUNE
VIII. JULY
IX. AUGUST
X. SEPTEMBER
XI. OCTOBER
XII. NOVEMBER
XIII. DECEMBER
XIV. STARS OF THE SOUTHERN HEMISPHERE
XV. THE MILKY WAY OR GALAXY
XVI. THE SURFACE OF THE SUN
XVII. THE SOLAR SYSTEM
XVIII. THE ORIGIN OF THE EARTH
XIX. JUPITER AND HIS NINE MOONS
XX. THE RINGS AND MOONS OF SATURN
XXI. IS THE MOON A DEAD WORLD?
XXII. COMETS
XXIII. METEORITES
XXIV. THE EARTH AS A MAGNET
XXV. SOME EFFECTS OF THE EARTH'S ATMOSPHERE UPON SUNLIGHT
XXVI. KEEPING TRACK OF THE MOON
XXVII. THE MOTIONS OF THE HEAVENLY BODIES
XXVIII. THE EVOLUTION OF THE STARS—FROM RED GIANTS TO RED DWARFS
XXIX. DOUBLE AND MULTIPLE STARS
XXX. ASTRONOMICAL DISTANCES
XXXI. SOME ASTRONOMICAL FACTS WORTH REMEMBERING
TABLES
Отрывок из книги
Isabel Martin Lewis
Published by Good Press, 2021
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This ratio between successive magnitudes continues among the telescopic stars. A star of the sixth magnitude is one hundred times brighter than a star of the eleventh magnitude which in turn is one hundred times brighter than a star of the sixteenth magnitude.
The faintest stars that can be seen visually in the greatest telescopes are of the seventeenth or eighteenth magnitude, though stars two or three magnitudes fainter can be photographed.
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