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Planetary Orbit Simulator – Pretest
Answer the following questions. Question 1: Which of the following is not part of Kepler's contribution to planetary orbits? a) shapes of the orbit b) speeds of planets in their orbit c) orbital period d) gravity Question 2: Rank the following 4 ellipses below in order of increasing ellipticity.
a) A, B, C, D b) B, A, D, C c) C, D, B, A d) D, C, B, A Question 3: Which of the following look most like the orbit of Venus?
a)
b)
c)
d)
Question 4: At which point or points is the planet slowing down? (planets shown here are assumed to be orbiting counter-clockwise) a) A, E b) B,C,D c) D d) A, B, C, D, E e) none of the points (the planet is moving at constant speed)
Question 5: With respect to the figure above, which of the following statements is true? a) The planet will cover regions A and B is the same amount of time because of Kepler’s 2nd^ Law.
Question 9: If the arrows depicted in the picture represent velocity, which planet or planets is shown correctly? (Planets can be orbiting either clockwise or counterclockwise.) a) A b) C c) D d) B, E Question 10: If a planet has a semimajor axis of 4 and an eccentricity of 0.2, how far is the planet at aphelion? a) 0. b) 3. c) 3. d) 4. e) 4. f) 20
