Some great photos there - including one of the plane's shadow
surrounded by a Brocken Spectre. But I wonder if the
starscapes are

Have seen one for myself though, from a glider in which we had
no
cameras -- or oxygen otherwise we'd have been a lot higher [1]
and might
have missed it.
[1] The lift in wave from Mull while we were over Cairngorm
was such
that I think that 20,000ft was easily possible that day.
Red letter
day in any event, and still the highest I've reached in a
glider. (We
knocked it off long, long before 20,000!)

Mike

I've several times seen a Brocken Spectre from gliders - the
best views are in lowish light and not too far above the clouds.

(Highest I've ever been in a glider was 17,000 feet, and yes, I
was using oxygen. Our club record is 24,500 feet and the UK
record is not far short of 38,000 feet.)

Anne