ESS
Grade-9
Easy
Question
Planets move in small circles called________.
- Dicycles
- Epicycles
- Cycles
- Recycles
Hint:
In order to explain the motion of the planets, Ptolemy combined eccentricity with an epicyclic model
The correct answer is: Epicycles
- In the Ptolemaic system each planet revolves uniformly along a circular path (epicycle), the centre of which revolves around Earth along a larger circular path (deferent).
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