Wonders:
(National Wonder, possibly unavailable for Independent 3rd trait civs)Tribute to the Pioneers, made available at Low-G Construction, (+2 health this city, +1 Population all cities in empire). A park with a bronze statue of one of the more famous pioneers of the Lunar Coloni(s/z)ation Effort, dedicated in honor of their perserverance and dedication to the survival of humankind on the Moon. +2 health due to the tourist trap effect, it inspires a few more people each visit to make plans to stay on the Moon or come back and stay, adds to gene pool. +1 population to all cities in empire because on construction it'll attract people who believe in the values of the civ that built it. National cuz of the billions of people on the Earth who don't necessarily agree with any one faction on the Moon.
(World Wonder, possibly no or lesser effect if Isolationism civic is being practiced, made available at Lunar Trading Policy, made obsolete at say... Spaceflight or some such tech)Corporate Trade Network, +2 commerce in each city in empire, +5 deviation from present% research/production per trade route. With the realization of the commercial possibilities of the Moon, an international consortium of corporations representing various interests both on the Moon and on Earth formed and sent a proposal to the Moon: We will agree not to colonize the Moon so long as we are allowed conduct all trade efforts between the Earth and Moon. Realizing the wealth to be made by signing on to this deal, (leader) readily accepted. +5% production/research per trade route to represent the trickle of resources the trade routes provided by the conglomerate. Only 5% because of the logistical concerns of moving several million tons of goods with reusable or disposable rockets and getting them down on the Moon without damaging them. Thankfully, people on the Moon are so willing (either immigrants from Earth or the immensely wealthy) to purchase Earth goods that are not otherwise available on the Moon in sufficient quantities that the profit margin has been driven up to tolerate losses of up to 65%.
Building:
Immigration and Customs Suboffice, available at Spaceflight, unavailable for civs with Isolationism civic implemented:
+2 Health, +2 Commerce this city
With the hardships of intraorbital spaceflight largely reduced to that of a late 20th century transcontinental flight came the droves of people looking for a new life on the Moon, as well as the cargo transportation abilities of that era, allowing for the Moon to finally overcome its isolation amongst the vacuum of space.