A Compendium of Astronomy: Intended to Simplify and Illustrate the Principles of the Science
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according ancient angle aphelion appear astronomers atmosphere attraction authors axis begin called cause centre century circle clock comets commence computed conjunction considered continued dark declination diameter direction discovered disk distance divided earth east eclipses elevated equal equator equinox figure fixed force four given globe greatest half heavenly bodies heavens hemisphere Herschel horizon hour inclination increased inhabitants Jupiter known latitude less letters light longitude lunar magnitude Mars mean Mercury meridian miles month moon moon's motion move nearly night node object obliquity observed opposite orbit parallax parallel passing period planets Plate poles position present rays refraction represented respecting revolution revolve ring rising rotation round satellites Saturn seasons seconds seen shadow side solar stars sun's supposed surface tides tion Tropical true turned Venus visible whole