The Primary Purpose of Describing Planetary Orbits in Terms of Epicycles

question 28

Multiple Choice

The primary purpose of describing planetary orbits in terms of epicycles and deferents was to account for the

• A) generally eastward motion of a planet compared to background stars while the whole sky appeared to move westward.
• B) variation of brightness of a planet with time.
• C) difference between the sidereal period and the synodic period of a planet.
• D) pattern of direct and retrograde motion of a planet as it moved slowly against the background of stars.

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Definitions:

Vestibular Sacs

Structures in the inner ear that help maintain balance by sensing changes in head position, contributing to the vestibular system.

Olfactory Receptors

Specialized nerve cells in the nose involved in detecting and identifying different odors.

Sensorineural Hearing Loss

A type of hearing loss resulting from damage to the inner ear or the nerve pathways from the ear to the brain.

Cochlea

A spiral-shaped, fluid-filled inner ear structure responsible for converting sound waves into electrical signals the brain can understand.