thanks for info
after 14 years in alaska, i saw quite a few sun dogs and the northern lights. the best year was 84 i think, very bright lights then.
haven't seen the moonbow yet though.
and i did see the flash of green just as the sun set under the horizon in alaska once.
i've read "the strange properties of lights" and it is so bloody complicated but interesting to try to understand it. just studying the reflections of the EFIS panels off the side windows of the 737 at night is beyond my full comprehension.
thanks again.