The station has four vacation modules.
The inner and outer modules are in the wrong orbits.
They drift away.
Here is a closeup view of the modules drifting away.
We had better attach the vacation modules with springs.
Then the springs will stretch.
The forces stretching the springs are tidal forces .
Resulting shape of the Moon.
The Earth doesn't deform so much, but the oceans do.
How many times a day is it high tide at the coast?