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A student draws a planet's yearly path as a neat circle and is told the shape is wrong. The correct shape is:
AAn ellipse
BA square
CA spiral
DA triangle
Answer & Solution
Correct answer: A. An ellipse
1. A circle was the older assumption.
2. The Sun sits at one focus.
3. The orbit is an ellipse.
_Source: OpenStax Astronomy 2e, Chapter 3, Orbits and Gravity._
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