Hey and welcome!
As for astrology, the stars predict Germany will lose the game war, which is very accurate. Sorry, couldn't resist
Now for astronomy, the thing is, the game world is a cylinder so everything celestial gets quite a bit wonky when you travel around. Even the sun and moon are mad as hatters in the game world. There have been attempts however to create methods for navigating using the stars (the constellations are visible) but I'm not sure if anyone ever found a good method. Someone might have and I just never heard of it though.