The spherical astrolabe of Ptolemy (2nd c. Α.D.) – The…“G.P.S.” of the stars of the ancient Greeks

It was an exceptional astronomical instrument which
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The “plinthis” (block) of Hipparchus (2nd c. B.C.)

It was a simple astronomical instrument suitable
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The “tetrantas” (Quadrant) of Hipparhus (2nd c. B.C.) – The first latitude locator of daily use

It was a measuring instrument which was
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The planetary system of Ptolemy (2nd c. Α.D.)

It was the geocentric astronomical model of
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The four-cubit dioptra of Archimedes (3rd c. B.C.)

It was an early astronomical instrument suitable
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The parallactic instrument of Ptolemy (2nd c. Α.D.)

It was an astronomical instrument suitable for
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