The Story of the Heavens (eBook, ePUB)

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Early Astronomical Observations-The Observatory of Tycho Brahe-The Pupil of the Eye-Vision of Faint Objects-The Telescope-The Object-Glass-Advantages of Large Telescopes-The Equatorial-The Observatory-The Power of a Telescope-Reflecting Telescopes-Lord Rosse's Great Reflector at Parsonstown-How the mighty Telescope is used-Instruments of Precision-The Meridian Circle-The Spider Lines-Delicacy of pointing a Telescope-Precautions necessary in making Observations-The Ideal Instrument and the Practical One-The Elimination of Error-Greenwich Observatory-The ordinary Opera-Glass as an Astronomical I...

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