Why Did Ptolemy Have the Planets Orbiting Earth on "Circles

question 86

Multiple Choice

Why did Ptolemy have the planets orbiting Earth on "circles upon circles" in his model of the universe?

• A)to explain the fact that planets sometimes appear to move westward, rather than eastward, relative to the stars in our sky
• B)to explain why the Greeks were unable to detect stellar parallax
• C)to explain why Venus goes through phases as seen from Earth
• D)to explain why more distant planets take longer to make a circuit through the constellations of the zodiac
• E)to properly account for the varying distances of the planets from Earth

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Definitions:

Stretch Often

the recommendation to engage in regular stretching exercises to maintain flexibility and reduce the risk of injury.

Musculoskeletal Disorders

Conditions that affect the human body’s movement or musculoskeletal system, including muscles, bones, nerves, tendons, ligaments, and structures supporting the limbs, neck, and back.

Ergonomics

The study of people's efficiency in their working environment, focusing on the design of products and spaces to improve safety, comfort, and performance.

Range of Motion (ROM)

The full movement potential of a joint, usually its range of flexion and extension.