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Ptolemy XII Neos Dionysus (Ancient Greek: Πτολεμαῖος Νέος Διόνυσος, romanized: Ptolemaios Neos Dionysos, lit. 'Ptolemy the new Dionysus ' c. 117 – 51 BC) [ a ] [ 1 ] [ 2 ] was a king of the Ptolemaic Kingdom of Egypt who ruled from 80 to 58 BC and then again from 55 BC until his death in 51 BC.
Ptolemy's law of refraction, replaced by Snell's law. Luminiferous aether – failed to be detected by the sufficiently sensitive Michelson–Morley experiment, made obsolete by Einstein's work. Caloric theory – Lavoisier's successor to phlogiston, discredited by Rumford's and Joule's work. Contact tension – a theory on the source of ...
Between Hipparchus's model and Ptolemy's there was an intermediate model that was proposed to account for the motion of planets in general based on the observed motion of Mars. In this model, the deferent had a center that was also the equant, that could be moved along the deferent's line of symmetry in order to match to a planet's retrograde ...
Book III covers the length of the year, and the motion of the Sun. Ptolemy explains Hipparchus' discovery of the precession of the equinoxes and begins explaining the theory of epicycles. Books IV and V cover the motion of the Moon, lunar parallax, the motion of the lunar apogee, and the sizes and distances of the Sun and Moon relative to the ...
The couple was first proposed by the 13th-century Persian astronomer and mathematician Nasir al-Din al-Tusi in his 1247 Tahrir al-Majisti (Commentary on the Almagest) as a solution for the latitudinal motion of the inferior planets [4] and later used extensively as a substitute for the equant introduced over a thousand years earlier in Ptolemy ...
Ptolemy XI was succeeded by a son of Ptolemy IX, Ptolemy XII Neos Dionysos, nicknamed Auletes, the flute-player. By now Rome was the arbiter of Egyptian affairs, and annexed both Libya and Cyprus. In 58 BC Auletes was driven out by the Alexandrian mob, but the Romans restored him to power three years later.
Ptolemy I and other early rulers of the dynasty were not married to their relatives, the childless marriage of siblings Ptolemy II and Arsinoe II [22] being an exception. The first child-producing incestuous marriage in the Ptolemaic dynasty was that of Ptolemy IV and Arsinoe III , who were succeeded as co-pharaohs by their son Ptolemy V , born ...
This innovation expertly and completely circumvents all that is superfluous or discordant in the system of Ptolemy. On no point does it offend the principle of mathematics. Yet it ascribes to the Earth, that hulking, lazy body, unfit for motion, a motion as quick as that of the aethereal torches, and a triple motion at that. [6]