[SUGGESTION] Collision ETA for dynamic planet smashes

It'd be cool for systems that have a fixed collision if there were a UI element that showed how long the planets have left until collision.
Something like an arrow on the area where they collide that has a countdown timer above it.

Just an idea.

EDIT: It'd also make it easier to make systems with a collision in the system editor if it carried into that.

Can someone also explain what collisions are? I saw a tournament video where two moons were passing through each other every 15 minutes -- is that what collisions are? How does it work? Do all units on the two moons get wiped every 15 minutes or something? (in the video the match ended on the main planet, so I didn't get to see what happens when units land there). It looks retarded.

They now actually smash into each other without halleys and the damage is dependant of the size of each. Afaik you can even have them burn up on the sun by accident collision.