“The Phobos facility is built like a gigantic, underground cone extending many hundreds of meters into the rock. There are a bunch of levels, I’m not even sure how many. Eight? Nine? The whole thing is built in the center of the solar system’s largest strip mine, which would be terrible for the Phobos ecology—except that Phobos doesn’t have an ecology, of course; it’s an airless moon of ice and rock.”