BS”D
What do you want to learn about astronomy? The positions of the stars? Their brightness? How to identify them?
Or their origins?
The first three are not dangerous; neither for that matter is learning about the gases which compose them.
It is discussing the origins as believed by scientists that can be dangerous.
The first way of studying is no different than knowing about the eating habits and bodily structure of a 600 kilo bear, or even to deduce that dogs and bears are somehow related. If the 600 kilo bear is black or brown, then his hibernation patterns may be of interest to scientists who want to replicate that process in humans to allow for certain types of medical treatment. (If he is a polar bear, which at that weight is more likely, then his fur and its layered structure is supposedly the inspiration for a type of insulation fabric made by duPont or one of the other giants which is used in outdoor sport coats).
The second could lead you to believe that a 600 kilo bear and a mouse somehow evolved from the same organism, which is very possibly both kefira and shtus.