moon counts, contd.

Miller, Mark C <mark.c.miller@...>

Judging the size of the moon is a tricky thing, as the density of the air
you look through affects its optical properties (air acts like a lens; the
more of it you look through, the bigger things seem to be). Judging the size
of a bird flying past the moon sounds like a very tricky thing, as you know
neither how far away it is nor how high (air density affects the apparent
size of a bird, too). The military and high-budget astronomers use computers
and lasers to remove air's distortions; we could learn so much using some of
their equipment! Note to Richard Rowlett: Can you see nocturnal migrants
with those "big eyes" of yours?

Mark Miller