# 42. Imagine that NASA is planning a trip to Mercury, using a least energy orbit (Hohmann...

###### Question:

42. Imagine that NASA is planning a trip to Mercury, using a least energy orbit (Hohmann transfer orbit). Mercury is on average 0.39 AU from the Sun, but we wish to reach Mercury at its aphelion (0.49 AU). Is our travel time going to be greater or smaller than trying to reach it at its perihlion? a. longer, since we have a longer semi-major axis of the trip b. shorter, since we have a shorter semi-major axis of the trip c. the same travel time.

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