Spaceception

From Chapter 2 of Infinitum;

Morales eased the ship sideways as it came in the station. It was one of the greatest construction projects in human history. Almost 200 years ago, engineers crafted a massive engine on Phobos in order to push it to a higher orbit for use as a space elevator. When they didn’t need the engine anymore, it was repurposed as a dock for crafts entering and leaving the port. Since then, there have been so many construction projects on Phobos that it’s unrecognizable as an asteroid.

“Man, we could stay here for a little while, right?” Asked Morales as he craned his neck to get a better view of the city at the base of the elevator. It was the largest city on Mars with a population of over a billion, spread out like strands of a spider's web across the surface, some parts stretching beyond the terminator, and into the night.