To me, Anna Karenina is really mostly notable for having the second-greatest opening line in all literature.
"It was the best of times, it was the blurst of times."
Definitely the greatest line I've ever read. Such extensive imagery and metaphor (well beyond just the sky), tucked into 15 words.
It's hard to pinpoint a "best," but I agree that this one (from Gravity's Rainbow) it quite, quite good, one I recall often.