RoFortaleza
Chieftain
You need to hard-build the Spaceport first (you can Chop Forests or Harvest Quarries to make it faster). Then you use the GPs to build all 5 parts. Make sure to use the 100% space projects GPs first. You can build all 5 parts in 4 turns with one Spaceport.
The 100% adjacency bonus cards simply double the current adjacency yield of all districts of a specific type. For example, if you are getting +2 science from a Campus (since it is next to two mountains) and you decide to use the Natural Philosophy card (from the Recorded History civic which provides +100% Campus district adjacency bonuses), you will now be getting +4 science from that Campus from adjacency bonuses alone. This will happen for all Campuses in your empire. To know what exactly provides adjacency bonuses to a specific district type simply check out the district name in the Civilopedia. To know the current adjacency yield of a district, check out the second tab of the city info to the left (however, it will also take into account any bonus yields you are getting from any City State).
Thanks! hehe