Talk:Astronaut lairs/@comment-116.48.21.126-20111231142411/@comment-4583259-20111231200054

The "cave frequency" is right below "exotic terrain".



But it doesn't actually seem to make any difference where you set cave frequency: high or low, you'll still get about 1 astronaut lair for every sq km of terrain (which is about 8 or 9 superblocks).

These options are only given once, when you create a new moon (that is, when you start a new game)