The UnMuseum's Ponzo and the Moon - Explains why the Ponzo Illusion makes the Moon appear larger when near the horizon. Moonstick Information Site - Describes a slide rule Moon phase calendar accurate over 8000 years into the past or future, and provides other methods of computing astronomical information. Moon Phases - Information and Perl script to calculate moon phases including phase illumination age distances angular diameter new/full moon calculation Phase of Moon - Displays the phase of the Moon in a browser window, with times of last and next Full Moon and New Moon. Xphoon - Xphoon sets the X-Windows root window image to a picture of the Moon in its current phase. StarChild Moonlight Madness - NASA's Star Child site page that describes the phases of the Moon. Ends with a test to identify the eight Moon phases and their order. The Moon: It's Just a Phase It's Going Through - The Astronomical Society of the Pacific's detailed explanations of the Moon's phases, including positions of the Moon in southern and northern hemispheres during its different phases and the times of day each phase is visible. Astronomical calendar - On-line calculator for Moon/Sun Rise/Set, moon phase, sidereal time and Julian day. Sky & Telescope: Dating van Gogh's Moonrise - Article identifying the exact date and time of van Gogh's Moonrise painting, based on Moon phase calculations. Sky & Telescope: Greek Marathon Dated from Phase of Moon - Describes how astronomers used phase of Moon calculations and ancient Greek religious festivals to date the original Marathon run. Phases of the Moon and Percent of the Moon Illuminated - Pictures, animations, and brief comments. Correct Time and Moon Phase - From the atomic clock at the United States Naval Observatory. Also allows the user to view the phase of the Moon for any date and time [1800-2199 A.D].