Thorium & Mercurite are now on the server. There is a “black hole” near the asteroid field.
Yes you can technically land on it and you may can get away from it but it is a transparent-ish planet with 2.0 gravity that extends out very far. The main purpose to support a gravity field for Thorium & Mercurite.
Some of the asteroids are deeper into the field than others. Next server restart will reduce Thorium and Mercurite mass a little.