Chapter 1: Problem 4
Why do planets appear to move with respect to stars? (B)
Short Answer
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Planets appear to move with respect to stars due to their relative motion, which is influenced by both the actual motion of planets in their orbits around the Sun and Earth's motion (orbiting the Sun and rotating on its axis). As planets and Earth move at different speeds and distances from the Sun, their relative positions change over time, causing the observed apparent motion where planets seem to shift against the background stars from the perspective of an observer on Earth.
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Key Concepts
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