Xphoon sets the X-Windows root window image to a picture of the Moon in its current phase.

The United States Naval Observatory (USNO) Moon phase display for the years 1800 through 2199.

Explains why the Ponzo Illusion makes the Moon appear larger when near the horizon.

NASA Moon images with captions showing different phases, suitable for printing and classroom display.

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.

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.

Describes how astronomers used phase of Moon calculations and ancient Greek religious festivals to date the original Marathon run.

Article identifying the exact date and time of van Gogh's Moonrise painting, based on Moon phase calculations.

Pictures, animations, and brief comments.

A 100 by 100 pixel GIF image of the current Moon phase on a black background, from the United States Naval Observatory. Accessible as a URL for embedding in web pages.

Displays the phase of the Moon in a browser window, with times of last and next Full Moon and New Moon.

Describes a slide rule Moon phase calendar accurate over 8000 years into the past or future, and provides other methods of computing astronomical information.

NASA Goddard Spaceflight Center (GSFC) Five Millennia Catalog of the phases of the Moon.

Information and Perl script to calculate moon phases including phase illumination age distances angular diameter new/full moon calculation

Provides a Lunar Calendar where the moon is the focal point. Each week begins with a phase of the moon new, quarters and full moon, thus taking away the seven day week.

NASA's Dr. Marc of The Space Place answers questions about Moon phases and the lunar month. Includes GIF animation of the Moon going through its phases.

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].

On-line calculator for Moon/Sun Rise/Set, moon phase, sidereal time and Julian day.