The formation of the solar system left trillions of bits of debris behind. This debris comes in two broad varieties: asteroids, which are made up mostly of rocky materials, and comets, which are made up mostly of water and methane ice. This debris represents both a near-term danger and a far-term treasure trove of resources for future space-faring cultures.
| MANNED ASTEROID MISSIONS | Visiting cosmic debris. |
| REDIRECTING ASTEROIDS AND COMETS | Shuffling megaton rocks around the solar system |
| ASTEROID BOMBARDMENT | Doomsday rocks as weapons. |
| DIVERTED ASTEROID SATELLITE | Putting a space rock in orbit. |
| HOLLOWED ASTEROID/COMET | Large colonies on minor bodies. |
| STEPPING STONE COLONIZATION | From the Kuiper Belt to the Oort Cloud and beyond. |
| HOME | SOLAR SYSTEM HUB |