What would happen if the moon's revolution speed was half as fast?

Answer 1

If the moon's revolution speed were half what it is now, it would need to be further away to maintain a stable orbit.

• the moon would appear smaller
• tides would have a lower magnitude
• there would be no more total eclipses of the sun, because the unique size-distance ratios that make a total eclipse of the sun possible would have changed.

Since the moon's rotation speed would be different from one revolution around Earth,

• all sides of the moon would be visible from earth
• the phases of the moon would be longer

The length of earth's days and nights would not be affected, since that is a function of the earth's rotation in relation to the sun. Unless the moon's rotation also changed, the length of the moon's days and nights would not change either.