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Keyword: hipparchus

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  • Astronomy Picture of the Day -- A Double Star Cluster

    01/01/2013 8:31:16 AM PST · by SunkenCiv · 8 replies
    NASA ^ | January 01, 2012 | (see photo credit)
    Explanation: Few star clusters are seen to be so close to each other. Some 7,000 light-years away, though, this pair of open or galactic star clusters is an easy binocular target, a lovely starfield in the northern constellation Perseus. Also visible to the unaided eye from dark sky areas, it was cataloged in 130 BC by Greek astronomer Hipparchus. Now known as h and chi Persei, or NGC 869 (above right) and NGC 884, the clusters themselves are separated by only a few hundred light-years and contain stars much younger and hotter than the Sun. In addition to being physically...
  • Ptolemy Tilted Off His Axis (lost celestial secret found)

    03/30/2005 10:35:09 AM PST · by Between the Lines · 63 replies · 2,557+ views
    LA Times ^ | March 30, 2005 | John Johnson
    Studying a statue of Atlas holding the sky, an American astronomer finds key evidence of what could be a major fraud in science history. In a sunlit gallery of the Museo Archeologico Nazionale in Italy, astronomer Brad Schaefer came face to face with an ancient statue known as the Farnese Atlas. For centuries, the 7-foot marble figure of the mythological Atlas has bent in stoic agony with a sphere of the cosmos crushing his shoulders. Carved on the sphere - one of only three celestial globes that have survived from Greco-Roman times - are figures representing 41 of the 48...
  • The Antikythera Mechanism: Physical and Intellectual Salvage from the 1st Century B.C.

    08/14/2004 3:01:21 PM PDT · by SunkenCiv · 39 replies · 1,380+ views
    The Antikythera mechanism was an arrangement of calibrated differential gears inscribed and configured to produce solar and lunar positions in synchronization with the calendar year. By rotating a shaft protruding from its now-disintegrated wooden case, its owner could read on its front and back dials the progressions of the lunar and synodic months over four-year cycles. He could predict the movement of heavenly bodies regardless of his local government's erratic calendar. From the accumulated inscriptions and the position of the gears and year-ring, Price deduced that the device was linked closely to Geminus of Rhodes, and had been built on...