Question #2663

If a planet moves around its orbit of the Sun, it’s maximum speed is twice its minimum speed.
What can we say about its orbit?
a. The orbit is nearly circular
b. The eccentricity is about 2
c. The planet is twice as far from the Sun at aphelion as at perihelion
d. The eccentricity is close to zero

Expert's answer

c. The planet is twice as far from the Sun at aphelion as at perihelion

Because the speed of the planet inverse propotional to the distance to the Sun.

Because the speed of the planet inverse propotional to the distance to the Sun.

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