Letters on Astronomy, Addressed to a Lady: In which the Elements of the Science are Familiarly Explained in Connection with Its Literary History : with Numerous EngravingsHarper & Brothers, 1847 - 419 strani |
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45 cents 90 cents angle appear 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 gravity greater greatest Halley's comet heavenly bodies heavens Hence Herschel HISTORY horizon hundred inferior conjunction instrument John Herschel Jupiter Kepler latitude laws length less LETTER 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 Uranus velocity Venus vernal equinox visible west to east