Location
Rocket-vehicle energy requirements would have limited the location of the base to an area of 20 deg latitude/longitude on the Moon, from ~20° N, ~20° W to ~20° S, ~20° E. Within this area, the Project selected three particular sites:
- northern part of Sinus Aestuum, near the Eratosthenes crater
- southern part of Sinus Aestuum near Sinus Medii
- southwest coast of Mare Imbrium, just north of the Montes Apenninus mountains
Read more about this topic: Project Horizon