• Install a well anchored level shelf.

• Plaster, sand the holes and repaint when you remove the shelf.

Very basic tools, very easy techniques, yet mind blowing how many people don’t know how to do these things.

I’m so glad i could help!!

Sorry if someone else pointed to this already, but this could be relevant for your story:

“Unlike a body circling a single star, a planet orbiting a pair of stars would have to contend with two gravitational fields. And because the stars themselves orbit each other, the strength of the gravitational forces would constantly change.”

Source