How long does it take to go back and forth between the earth and the moon?

The straight-line round trip distance is about 70 hours. It is impossible to go straight to the moon, which is the basic common sense revealed by aerospace insiders. ) So about 70 hours is just a theoretical guess. So far, no country can do it, including the United States.

All the routes to the moon are recorded in parabola "arc" back and forth, and we have to circle the moon near the moon, slow down and return to the moon when we return. Even if you do nothing but go back and forth to the moon, it is impossible to go back and forth for hundreds of hours.

Therefore, the manned landing on the moon in the United States 50 years ago, even the insiders of NASA did not believe it. Because there is no common sense, no logic.