Seasons:

1. Earth's appearance in different times of year
2. Seasons Animation
3. Applet: Seasons

Phases of the Moon:

1. Moon Phases (use the "Both" Point of View).
2. Moon Phases Animation
3. Moon Phases with rotating Earth

Retrograde Motion In Copernicus' Heliocentric Model:

1. Retrograde Motion (with line showing direction to planet)
2. Retrograde Motion (with view from Earth)
3. Retrograde Motion (slower version)

Retrograde Motion In Ptolemy's Geocentric Model:

1. Retrograde Motion (with epicycles)

Kepler's Laws:

1. Planetary Motion (start your own)
2. Simulations of Kepler's Laws
3. Kepler's Laws (all three in one animation)

Newton's First Law:

1. The Car and the Wall
2. The Motorcyclist
3. The Truck and Ladder

Newton's Second Law:

1. Circular Motion

Color:

1. Subtracting Colors
2. Adding Colors

Blackbody Radiation:

1. Blackbody Applet (with the appearance of the color mixture)
2. Blackbody Spectrum

Nearby Stars:

1. Interactive 3-D Map of the Nearest Stars

Black Holes:

1. Circling the Black Hole (looking down)
2. Circling the Black Hole (looking forward)
3. Approaching the Black Hole

The Expansion of the Universe:

1. A Balloon Analogy (nice explanation)

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Last update: September 11, 2006