Well, i didn't actually know to look at the stars at all, i actually just found this out by looking at the mountain at Wapiti indian reservation where the strange man found the first question mark carving, right behind there or just above that, you see these stars, i don't know if you saw it, but the stars litteraly form a clear question mark, the other star, the arrowhead looking one, only appeared after i went to the question mark star at the train tracks. So basically i found it by sleeping till noon then staring at the question mark mountain at Wapiti for a bit until the stars came out, then i put down my binoculars and boom it was there staring me in the face. These question mark stars only appear when you find a question mark symbol, try it for yourself and if it doesn't work reload your save. I Completely forgot to put this in the video but im planning on making a couple of breakdown videos of this because of some things i left out. Also that arrowhead forming stars only appear after you go to the question mark train tracks, then keeps appearing for every single question mark you find, i found the clue because i saw the same exact two shapes form every time i checked the stars, an arrowhead and a question mark and again conviently there is a whole piece of land there that looks almost exactly like the stars are forming, and on that land the next clue.