After flying around with my SS analog (Chromius) in the test island for an hour looking at the stars longingly, I realized that I haven't seen an astronomical observatory in the game yet. And yeah, with the light pollution terrestrial observation is dead. It's been moved off-world to clearer skies.
Back in my college days, I ran the planetarium for two semesters and had full access to the telescope. Mount Lemmon used to be one of my favorite day trips
when I lived in Tuscon. My head is still in the stars.
So, where is the observatory? I expect that any fully developed/ old city would have one along with a fully developed physics program from the old university. And, there may be some esoteric off-shoots, you know, the wackos who were dismissed by their peers who maybe 'too advanced for their time', the alien conspiracists, the 'real' aliens who are trying to keep it a big secret, the ones who built up a religion around such things, etc.
I think that it should be in an area that was light-deprived and low humidity when it was built. Top of a mountain and well away from the city.
I'll leave that for you for now.