Berkeley (1709), J.T. Desaguliers (1736), W. Porterfield (1737), R. Smith (1738), C.N. Le Cat (1744), D. Hartley (1749), Thomas Young (1807), and Carl Friedrich Gauss (1830). References Further reading External links A TED-Ed video on the Moon illusion, offering many theories A vision scientist reviews and critiques Moon illusion theories (and argues for oculomotor micropsia) Another careful review of Moon illusion research A physicist offers opinions about current theories Summer Moon Illusion – NASA "Finally! Why the Moon Looks Big at the Horizon and Smaller When Higher Up" by Don McCready, Professor Emeritus, Psychology Department, University of Wisconsin-Whitewater, Revised 10 November 2004, retrieved 31 October 2015 Why does the moon look so big now? Why does the Moon appear bigger near the horizon? (from The Straight Dope) Moon illusion illustrated Moon illusion discussed at Bad Astronomy website New Thoughts on Understanding the Moon Illusion Carl J. Wenning, Planetarian, December 1985 Father-Son Scientists Confirm Why Horizon Moon Appears Larger Optical illusions Moon