The Recent Progress of Astronomy: Especially in the United StatesHarper, 1850 - 257 pages |
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45 cents 61 Cygni American appeared asteroids astronomical observations beats Bessel Biela body brightness Cambridge chronometer circuit clear aperture coincidence comet comparison computed degrees determined difference of longitude disc discovered discovery dome double stars eccentricity ecliptic eighth magnitude Engravings entire equatorial erected error Europe eye-pieces fixed star focal length four furnished Guinand heavens Herschel Iapetus inches aperture inches in diameter Jupiter Lassell Le Verrier Lieut longitude Mädler magnifying mass ment meridian circle micrometer Milky minutes motion of Uranus Munich Muslin nearly nebula Neptune ninth magnitude nodes nucleus number of stars object glass observatory obtained orbit parallax perihelion period Philadelphia planet position Prof Professor Challis proper motions Pulkova refracting telescopes Right Ascension satellite Saturn seconds of arc seen servations Sheep extra sidereal clock solar Struve sun's supposed tail tance tele telegraph telescope tenth tion tower transit instrument Uranus Verrier Walker Washington wire York
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