In my humble opinion, I'd say atmospheric turbulence playing games with your eyes... 8)
Ivan Gastaldo 8)
Coconut Creek, FL
Ivan's Observatory
Lat 26N 16' 48" Long 80W 10' 48"
[COLOR="Red"]Personal Website:[/COLOR] http://www.ivangastaldo.com
CCD Imaging and Processing/Deep Sky - Moderator
I like to complain about everything - Moderator
