Moon illusion(en.wikipedia.org)
en.wikipedia.org
Moon illusion
http://en.wikipedia.org/wiki/Moon_illusion
2 comments
If you look at the moon on the horizon upside down through your legs the illusion that it is large goes away.
Back when I was an MIT undergrad in the early 1970's I got a ride back to eastern New York for Thanksgiving or Christmas break with several other MIT students. That evening, the moon appeared very large, and I mentioned it was just an illusion. (I had read the July, 1962 issue of Scientific American growing up and knew about the illusion--it was the cover story.) Try as I might, I could not convince the others in the car that it was an illusion.