Funny that this topic should come up.. I was looking at the moon the other night with my 70mm Telescope & saw the exact same thing. I took a picture of it..
Please keep in mind I used my cellphone to take the pic. So the quality is questionable, the pics were mainly for my own enjoyment. The same effect came out in a few other shots as well. I hadn't had my telescope setup in a while & didn't have my camera attachment handy in order to use my good Nikon for pics..

I really wonder what that's about?

lemme clarify here. We all know for example about the little saying when there's a ring around the moon, snow's coming. But we're talking about a small barely noticable blue outline around the moon right? If so then ya, i've noticed it too just recently, good post.

optical illusion is my best guess, but then again i think i would have noticed it before. funny thing is i had this dream... it was a retarded dream, but it stressed the point that the moon was blue so i'm pretty sure its new phenomenon.

I'm a little late to this discussion, but if you wear glasses, it sounds like you're just seeing chromatic abberation, which is an optical defect in lenses that causes one end of the visible spectrum to focus at a different point than the rest (and its usually blue light that doesn't focus properly). Its very common in less expensive binoculars and telescopes as well.

[edit on 5-2-2009 by vor78]

Guess I'm little late here too, but the OP posted in early January when I also saw a halo. Have to admit, the more you look into it the more you'll find it is refraction of ice crystals. No less spectacular, though!

the moon is dotted with small blue glowy and larger blue glowy lights. there are various theories on what they are. aristarchus is a larger one. see it here:



www.thelivingmoon.com...

someone sent a photo of a blue moon he took with his telescope to thelivingmoon.com.
here it is

www.thelivingmoon.com...

[edit on 5-2-2009 by undo]

If you can see the halo with the naked eye it's most likely ice or moisture in the atmosphere. With telescopes and binoculars with poor quality glass you'll get a violet "halo" due to the issues with the glass used to make the lenses. Premium telescopes use "ED" glass that removes the violet ring (this ring happens when you view bright objects). I have a number of filters usually referred to a minus violet filters that will remove the halo if it's really distracting.