Question

multiple - choice question
at the aphelion (furthest from the sun) the planet is moving
at the same speed as at the perihelion
at its slowest
at its fastest
rewatch

Explanation:

Kepler's second law (the law of equal areas) states that a line segment joining a planet and the Sun sweeps out equal areas during equal intervals of time. When a planet is at aphelion (farthest from the Sun), the distance from the Sun is larger. To sweep out the same area in the same time as when it is closer (at perihelion), its speed must be slower. At perihelion (closest to the Sun), the planet moves faster. So, at aphelion, the planet is moving at its slowest.

Answer:

at its slowest