Letters on Astronomy: Addressed to a Lady; in which the Elements of the Science are Familiarly Explained in Connexion with Its Literary History |
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Page 6
... Eclipses , 195 LETTER XIX . Longitude . - Tides , 208 LETTER XX . Planets . Mercury and Venus , 225 LETTER XXI . Superior Planets : Mars , Jupiter , Saturn , and Uranus , 243 LETTER XXII . Copernicus . - Galileo , • LETTER 6 CONTENTS .
... Eclipses , 195 LETTER XIX . Longitude . - Tides , 208 LETTER XX . Planets . Mercury and Venus , 225 LETTER XXI . Superior Planets : Mars , Jupiter , Saturn , and Uranus , 243 LETTER XXII . Copernicus . - Galileo , • LETTER 6 CONTENTS .
Page 7
... Uranus . - Asteroids , · LETTER XXIV . 254 274 The Planetary Motions . - Kepler's Laws . - Kepler ,. 291 LETTER XXV . Comets , 312 LETTER XXVI . Comets , 334 LETTER XXVII . Meteoric Showers , . 346 LETTER XXVIII . Fixed Stars , 365 ...
... Uranus . - Asteroids , · LETTER XXIV . 254 274 The Planetary Motions . - Kepler's Laws . - Kepler ,. 291 LETTER XXV . Comets , 312 LETTER XXVI . Comets , 334 LETTER XXVII . Meteoric Showers , . 346 LETTER XXVIII . Fixed Stars , 365 ...
Page 226
... high antiquity are , Mercury , Venus , Earth , Mars , Jupiter , and Saturn . To these , in 1781 , was added Uranus , ( or Herschel , as it is sometimes called , from the name of its discoverer 226 LETTERS ON ASTRONOMY .
... high antiquity are , Mercury , Venus , Earth , Mars , Jupiter , and Saturn . To these , in 1781 , was added Uranus , ( or Herschel , as it is sometimes called , from the name of its discoverer 226 LETTERS ON ASTRONOMY .
Page 227
... Uranus , The foregoing are called the primary planets . Sev- eral of these have one or more attendants , or satellites , which revolve around them as they revolve around the sun . The Earth has one satellite , namely , the Moon ...
... Uranus , The foregoing are called the primary planets . Sev- eral of these have one or more attendants , or satellites , which revolve around them as they revolve around the sun . The Earth has one satellite , namely , the Moon ...
Page 228
... 1800,000,000 11. Uranus , or Herschel , The dimensions of the planetary system are seen from this table to be vast , comprehending a circular space thirty - six hundred millions of miles in diameter 228 LETTERS ON ASTRONOMY .
... 1800,000,000 11. Uranus , or Herschel , The dimensions of the planetary system are seen from this table to be vast , comprehending a circular space thirty - six hundred millions of miles in diameter 228 LETTERS ON ASTRONOMY .
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Common terms and phrases
angle appear ascertain astronomers atmosphere attraction axis called celestial centre circle comet conjunction constellation degrees diameter direction discovery disk distance diurnal motion doctrine double stars earth ecliptic equal equator equinox exhibited fact fixed stars force Galileo globe gravity greater greatest half Halley's comet heavenly bodies heavens Hence Herschel horizon hundred inferior conjunction instrument John Herschel Jupiter Kepler latitude laws length less light longitude lunar lunar eclipse magnitude measure Mercury meridian meteors millions of miles minutes moon moon's motion move Nature nearer nearly node objects observations opposite orbit parallax passing perihelion period phenomena planetary planets pole respect revolve right ascension ring round satellites Saturn seen shadow side space spectator sphere sun's superior planets supposed surface telescope thousand tides tion truth Tycho Tycho Brahe universal gravitation Uranus velocity Venus vernal equinox visible west to east