The line that divides day & night is called the "terminator." A couple
of cool pictures of the terminator on Earth: NASA Astronomy Picture of the
Day 24 April
2003; photograph from Space Shuttle Columbia's last
mission, February 2003.
Demonstration
of Moon Phases (Java) - Moon phases from three points of view: top
view; Earth view; or both. Great tool for visualizing what causes the
cycle of Moon phases.
Animations, 11 August 1999 solar eclipse: Meteosat color-enhanced full-disk (2.2M);
Meteosat black-&-white
regional sector (3.3M)
29 March 2006 Solar
Eclipse Seen by Satellite, including links to still images and an animation
(AVI, 2.314 MB) showing the Moon's shadow moving across the Earth.
The
Phaser - An Interactive Lunar Odyssey (The Phaser requires Shockwave
to run.)
