A research expedition discovers a captured moon suspended at the starward Lagrange point of RZ-9147, its shadow forever veiling the sun — creating a world born in eternal eclipse, and forever stranded within the ages of the medieval. The colonization effort that follows comes to an unexpected halt however...
-Start with advanced research on a medieval planet, at the cost of a less fortunate beginning under a permanent eclipse
-I recommend using the infamous medieval modpack with this scenario, although It should work with vanilla.
(W.I.P.)