Multiple Choice
The Copernican system for planetary motions is
A) Earth-centered, with the planets, the Sun, and the stars mounted on crystal spheres, pivoted to allow the correct motions around Earth.
B) Earth-centered, with the planets moving in epicycles around Earth.
C) Sun-centered, with the planets moving in elliptical orbits and the Sun at one focus of the ellipse.
D) Sun-centered, with the planets moving in perfect circles around the Sun.
Correct Answer:
Verified
Correct Answer:
Verified
Q1: One au, or 1 astronomical unit, is
Q2: A planet's sidereal year is different from
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Q5: If one uses a force of 100
Q6: Kepler's first law states that a planet
Q7: A major contribution of Johannes Kepler to
Q8: The Crab Nebula is the result of
Q9: Saturn experiences all of these EXCEPT<br>A) inferior
Q10: If a tenth planet (tentatively predicted to
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