Domes, Cubes, and Tunnels
On Mars, work had already begun in the hundreds of already-completed buildings on the surface, and in the thousands of rooms beneath. One of those rooms was a cavernous chamber that housed Mars Central Command, or CENTCOM.
“Tenth ring is coming up on schedule... now,” one of the technicians announced from his console. He was an ST1, or Sensor Technician First Class, and his current task was to monitor the ongoing construction and activation of sensors throughout the Sol system.
The entire front wall of CENTCOM was an enormous display, about the size of the screen in an IMAX movie theater. It was currently displaying a map of the solar system as seen from above the ecliptic, with points of interest labeled in colors denoting their operational status. Mars, for example, was surrounded with a yellow ring to highlight its partially operational status.