Questions: Which of Kepler's Laws explains: Planets orbit in an ellipse with the sun at one focus. 1st Law 2nd Law 3rd Law

Which of Kepler's Laws explains: Planets orbit in an ellipse with the sun at one focus. 1st Law 2nd Law 3rd Law
Transcript text: Which of Kepler's Laws explains: Planets orbit in an ellipse with the sun at one focus. 1st Law 2nd Law 3rd Law
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Solution

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Solution Steps

Step 1: Identify Kepler's Laws
  • Kepler's First Law: Also known as the Law of Ellipses, it states that planets move in elliptical orbits with the sun at one focus.
  • Kepler's Second Law: Known as the Law of Equal Areas, it states that a line segment joining a planet and the sun sweeps out equal areas during equal intervals of time.
  • Kepler's Third Law: Known as the Law of Harmonies, it relates the square of the orbital period of a planet to the cube of the semi-major axis of its orbit.
Step 2: Match the Description to the Correct Law
  • The description given is "Planets orbit in an ellipse with the sun at one focus."
  • This description directly matches Kepler's First Law, which is the Law of Ellipses.
Step 3: Conclusion
  • Based on the description provided, the law that explains the statement is Kepler's First Law.

Final Answer

The correct answer is 1st Law.

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