The Story of the Heavens

61 Cygni aberration actually appearance astronomers attraction axis beautiful body bright brilliant calculations celestial centre changes chapter circle comet compared constellation course crater diameter direction discovery distance double stars doubt earth ellipse equal fact globe gradually heat heavens Herschel instrument interest Jupiter Kepler known labours law of gravitation laws of Kepler length light lunar magnitude Mars mass measure Mercury meteorites meteors mighty miles a second minor planets minute moon moon's move movements nearly nebula Neptune night object observations observatory orbit parallax path period phenomena planetary Pole Star position present proper motion question radiation rays refracting telescope remarkable revolution revolve ring rotation round satellites Saturn seems seen shooting stars shower shown Sirius solar system sun's suppose surface tail telescope temperature theory tides tion transit of Venus unaided eye Uranus vast velocity visible volcanoes weight