Okay, I have nuked the enemy planet, all population and infrastructure is gone.  It is a dead asteroid.  I do not seem to be able to colonize or do anything with it.  It shows it is my planet.  I rebuilt the infrastructure to 100%.  My blue line has reached it.  I have attempted to colonize and can not.  There is no enemy ship or allie in the system, just my ships.
Is there a certain amount of loyalty or culture I need?  If so how much?  Can it be recolonized somehow or when do the people show back up? I am unable to build logistical structures.
I am sure I am missing something?
oh, is there a "pause button", I thought there was going to be a pause button?
Thank you for any assistence.