"Gianna Stefani" wrote in message
...
An image of the northern sky, taken at midnight (local) on the summer
solstice, is available on my web site via the 'Sights' link, or here
www.buchan-meteo.org.uk/vedute.htm

It was a little cloudy so not quite 'daylight' but by no means dark.

I know of this effect as 'dayglow'. Clearly it won't be as pronounced
as at your latitude but for a few weeks around the solstice, even at
1 am (effectively midnight) there is a definite lightening of the northern
sky, in clear conditions at least.
I wonder how far south this can be observed?

Col
--
Bolton, Lancashire.
160m asl.
http://www.reddwarfer.btinternet.co.uk
http://www.reddwarfer.btinternet.co....rPictures.html