I found this AWESOME article, where this guy comprehensively examines the astronomy of BSG...
I find that a completely convincing and rational argument, and I entirely believe it. Star Trek
taught me what Earth looks like:
Not a single cloud visible from space and the USA prominently featured... Clearly BSG's "Earth" is too cloudy, doesn't show the US, and is thus a deception!
(Yeah, I'm kidding. No insult meant to the linked site's author, and he may indeed turn out to be right in the final ep(!), but I think he's going a little deeper than is justified.)