shimmering in the sky

OK so every once in awhile im looking up at the stars and I notice a bluish light way up there too. well sometimes i see it going in small circles, sometimes little zig-zagz..i thought it was just my eyes but the other sstars (lights in the sky) they are still as could be. has anyone else seen these or have idea's to what they are???




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[edit on 2/1/2008 by kinglizard]

could be aurora boralis (Spelling?), light electrical charges, light reflecting from cities, alien activity, could be anything.