I to fell pray to these anomalous effects, although striking, they are only illusions. Now I personally can't explain them all, I have found numerous amounts of them in all different shapes, sizes and colors, some might accualy be real artifacts, but the vast majority are not. You don't have to take my word for it, it took a long time for me to submit, but my new theory for browsing in sky is that if the image is completely different than anything I have ever seen, it probably isn't real. I tend to placemark it anyway, just incase I learn somthing to the contrary in the future or to compare it to other oddities. I hope this helps, I've found it's hard to get anyone to make comments in these forums.