Deferent and epicycle
Planetary motions in archaic models of the Solar System
6,4406,710
Rare
Deferent and epicycle
Planetary motions in archaic models of the Solar System
In the Hipparchian, Ptolemaic, and Copernican systems of astronomy, the epicycle (from Ancient Greek ἐπίκυκλος (epíkuklos) 'upon the circle', meaning "circle moving on another circle") was a geometric model used to explain the variations in speed and direction of the apparent motion of the Moon, Sun, and planets. In particular it explaine…
- Attack
- 6,440
- Defense
- 6,710
- readers / month
- 3,300
- Article length
- 38 kB · 35 languages
Text from Wikipedia, CC BY-SA 4.0 · Authors
Deferent and epicycle is a Rare card because its Wikipedia article was read 3,300 times in the last 30 days. Its 38 KB of text give it 6,440 attack, and coverage in 35 Wikipedia language editions gives it 6,710 defense.