Did a quick search to see if anyone already posted this and couldn't find anything, so here goes: Metal planet, radius set to minimum (200). This is in the system editor using the [preview] option. Any attempt to actually [build] a system with this planet seems to never complete, and just loads forever. It's a shame, because I wanted to see what would happen if I tried to play a game on it.
Maybe it's the second Death Star that was being build above Endor. My friend, you have discovered and ancient relic of the past and an easter egg too!
I've noticed this before when I tried to create a thruster compatible metal moon. It is indeed cool looking!
