The Great Equatorial Armillary Instrument
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The Great Equatorial Armillary Instrument
The Great Equatorial Armillary Instrument, one of the instruments at Tycho Brahes great observatory at Uraniburg on the island of Hveen, Denmark (now Ven, Sweden). The instrument was used to determine the declination (celestial latitude) of stars. The circle was 272 cm in diameter and its edge was calibrated to one quarter of a minute of arc. The instrument could also be used to measure right ascension (celestial longitude) by comparison with a star of known right ascension. The illustration is from Tychos book Astronomiae Instauratae Mechanica, published in Wandesburgi in 1598
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Media ID 6452519
© DR JEREMY BURGESS/SCIENCE PHOTO LIBRARY
EDITORS COMMENTS
This print showcases the remarkable Great Equatorial Armillary Instrument, a true masterpiece of astronomical engineering. Located at Tycho Brahe's renowned observatory on the picturesque island of Hveen, Denmark (now Ven, Sweden), this instrument played a pivotal role in unraveling celestial mysteries. Measuring an impressive 272 cm in diameter, the armillary instrument was meticulously calibrated to one quarter of a minute of arc along its edge. Its primary function was to determine the declination or celestial latitude of stars with exceptional precision. By comparing their positions against known reference points, astronomers could accurately map out these heavenly bodies' locations in our vast universe. Moreover, this ingenious contraption also facilitated measurements of right ascension or celestial longitude. Astronomers would compare the position of a star with known right ascension to precisely calculate and record its location within our cosmic tapestry. The historical significance and intricate craftsmanship behind this instrument are truly awe-inspiring. It stands as a testament to Tycho Brahe's pioneering contributions to astronomy during the late 16th century. This stunning illustration is extracted from Tychos book Astronomiae Instauratae Mechanica published in Wandesburgi in 1598. It serves as a reminder that scientific exploration knows no bounds and continues to push boundaries even centuries later.
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