How to make it so objects dont absorb others.

[lothane]

I'm trying to figure out how to make objects not absorb each other and only collide? I saw a simulation where the moons joined together and didn't absorb each other and grow bigger. Is there a keyboard command to turn this on/off ?

[atomic7732]

During a simulation, just click the menu with the gear (on the left side), and you'll see something labeled "Collision Mode", click the one that looks like something is bouncing off.

See here for more info.