If you happen to ever get to the point where your empire is over populated, here are some easy steps to eliminate populations.
1. Up load population onto a transport and then eject them into space.
2. Up load population onto a transport then scrap it.
3. Up load population onto a transport, and then find a black hole and forget em.
4. Blow up the planet
5. Blow up the star, and reform the planets.
6. Give the planet to an enemy, then attack it.
Ok, its late, and yes, I am tired.