Someone must have found gold in them thar asteroids, because there are dozens of Terran of miners in orbit all over the Terran system. I suppose it's good for me that they are wasting money on ships that are useless, but it is a bit annoying to have to use up my precious movement points to pop them off one at a time so I can get my marines down on the planet. Seriously, there must be something screwy in the AI for so many mining ships to be built. Playing painful level, medium planet. I'm Torians, and the opponents are Terran, Yor, and Archean. I spied on the Yor planets, too, and cannot find even one miner. I can't say what the Archeans did, because they bit the dust early in the game. A few Terran planets have no miners, but most have at least one or two, and some have as many as six, in addition to whatever military craft are in orbit.