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Questions and Answers
According to Kepler's laws of planetary motion, which of the following statements is true about the orbit of a planet around the sun?
According to Kepler's laws of planetary motion, which of the following statements is true about the orbit of a planet around the sun?
- The orbit is a perfect circle
- The orbit is a hyperbola
- The orbit is an ellipse with the sun at one of the foci (correct)
- The orbit is a parabola
According to Kepler's second law of planetary motion, which of the following statements is true about the speed of a planet as it orbits the sun?
According to Kepler's second law of planetary motion, which of the following statements is true about the speed of a planet as it orbits the sun?
- The speed of the planet decreases as it gets closer to the sun
- The speed of the planet is zero at the aphelion
- The speed of the planet is constant throughout its orbit
- The speed of the planet increases as it gets closer to the sun (correct)
According to Kepler's third law of planetary motion, which of the following statements is true about the orbital period of a planet?
According to Kepler's third law of planetary motion, which of the following statements is true about the orbital period of a planet?
- The orbital period of a planet is directly proportional to its distance from the sun
- The orbital period of a planet is directly proportional to the mass of the planet
- The orbital period of a planet is inversely proportional to the square root of its distance from the sun (correct)
- The orbital period of a planet is inversely proportional to its distance from the sun
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