Mark Elkington wrote:

We left a party the other night and drove away up a hill. The moon was
full and low on the horizon, viewable through the branches of trees
and over the rooftops of houses at the top of the hill.

It looked huge, as big as the distant trees and houses.

As we drove toward the top of the hill, the moon shrank! By the time
we reached the top, the moon was only the size a soccer ball in the
branches of the now close trees.

So there you have it. Closeness to the horizon was not the cause, but
rather relative distances to terrestrial reference objects.


You can also measure its diameter to the reference point of the width of one
of your fingers held at arm's length and used to cover the lunar disk.
You'll find that even when the moon looks huge on the horizon or smaller
when higher in the sky, your finger still covers its orb.



--
Martin
"Photographs From the Universe of Amateur Astronomy"
http://home.earthlink.net/~martinhowell