Here's a good article about the moon illusion from NASA's Science@NASA series
"On Saturday night, June 30th, step outside at sunset and look
around. You'll see a giant moon rising in the east. It looks like
Earth's moon with the usual craters and seas, but something's wrong.
This full moon is strangely inflated. It's huge!
You've just experienced the Moon Illusion"...Read the whole article here
Jane Houston Jones
Senior Outreach Specialist, Cassini Program
JPL - 4800 Oak Grove Drive, MS 230-205
Pasadena, CA 91109 818-393-6435
Cassini SOC http://soc.jpl.nasa.gov/index.cfm
What's Up? http://education.jpl.nasa.gov/amateurastronomy/index.html