In the movie, Dune Part 2, when Lady Mergot Fenring watches over the gladiators fighting, there is this blue hue at the middle bottom of her binocular vision, they almost look like characters, what is it?

I am wondering, when we say ,,a long time ago in a galaxy far, far away'', is there anything in the movies or in the canon, or in the comics that suggests when is that. 4 billions years ago, 300 million, something else? Can we deduce also where is the star wars galaxy, can we deduce based on obje...