orb in the sky photo

ok...a friend is staying with us at the moment and she has just shown me this photo, it was taken in KOH PHANGAN in Thailand in april 2006. She says they took the 1st picture and when reviewing it noticed the orb in the sky, so she took the 2nd picture just afterwards to see if it would come out again.
I know for defo that she hasnt faked or messed with these pics, if it isnt something there then its a light refraction or something
can someone blow it up and focus on it? i cant do much with my image software!!
it reminded me of the steven greer pics recently posted with the thing on his t-shirt....

I don't know what to make of it, exactly. This is enlarged to 500%





[edit on 6/22/2007 by Mechanic 32]

I'm still firmly in the corner that orbs are dust particles, still, I blew it up to get a better look.




Looks like a blow up of a dust particle to me