Phases

Astronomical calendar - On-line calculator for Moon/Sun Rise/Set, moon phase, sidereal time and Julian day.
wise-obs.tau.ac.il/~eran/Wise/wise_calen.html

Correct Time and Moon Phase - From the atomic clock at the United States Naval Observatory.
www.obioncounty.com/News/clock.html

How long does each phase of the Moon last? - 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.
spaceplace.jpl.nasa.gov/en/kids/phonedrmarc/2004_march.shtml

Moon Phases - Information and Perl script to calculate moon phases including phase illumination age distances angular diameter new/full moon calculation
search.cpan.org/~brett/Astro-MoonPhase/MoonPhase.pm

Moon Phases 5000 Year Catalog - NASA Goddard Spaceflight Center (GSFC) Five Millennia Catalog of the phases of the Moon.
sunearth.gsfc.nasa.gov/eclipse/phase/phasecat.html

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.
www.moonstick.com/

Phase of Moon - Displays the phase of the Moon in a browser window, with times of last and next Full Moon and New Moon.
www.die.net/moon/

Phase of Moon GIF - 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.
tycho.usno.navy.mil/cgi-bin/phase.gif

Phases of the Moon and Percent of the Moon Illuminated - Pictures, animations, and brief comments.
aa.usno.navy.mil/faq/docs/moon_phases.php

Phases of the Moon Exercise - Shows the Moon in eight positions around the Earth to shade in the dark area and the unobservable side.
www.astro.lsa.umich.edu/~fogel/teaching/labs/moon_phases.html

The Space Place Images of Earth's Moon for the Classroom - NASA Moon images with captions showing different phases, suitable for printing and classroom display.
spaceplace.jpl.nasa.gov/en/educators/teachers_moon_images.shtml

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.
starchild.gsfc.nasa.gov/docs/StarChild/solar_system_level2/moonlight.html

The UnMuseum's Ponzo and the Moon - Explains why the Ponzo Illusion makes the Moon appear larger when near the horizon.
unmuseum.mus.pa.us/exmoon.htm

Virtual Reality Moon Phase - The United States Naval Observatory (USNO) Moon phase display for the years 1800 through 2199.
tycho.usno.navy.mil/vphase.html

Xphoon - Xphoon sets the X-Windows root window image to a picture of the Moon in its current phase.
www.sourceforge.net/projects/xphoon/

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. <small>(July 20, 2004)</small>
skytonight.com/news/3309321.html?page=1&c=y

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. <small>(June 2, 2003)</small>
skytonight.com/about/pressreleases/3307691.html?page=1&c=y