Related terms:
hippias
needham
almagest
deferent
ptolemy
heavens
sidereal
planets
astrolabe
ecliptic
treatise
cleisthenes
geometrical
celestial
precession
cosmology
peisistratus
spherical
astronomy
planetary
trigonometry
babylonian
heliocentric
isaac newton
trigonometric
astronomical
ancient greek
aristarchus of samos
history of astronomy
spherical trigonometry
Wikipedia sources:
Hipparchus
Almagest
Tyrant
Ptolemy
History of trigonometry
Chord (geometry)
History of Athens
History of science
History of astronomy
Antikythera mechanism
Context for words:
hipparchus
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