"Sun, Moon & Earth Applet"
This interactive applet displays the positions of sun and moon for any date, time and location on the horizon, and on an interactive world map with day and night regions. The times of rise and setting, the moon's orbital phase and more data are computed.

My GeoAstro Applet Collection: Overview

Sundials
a horizontal sundial, links and software

Analemma Sundial - easy to make

Paper Sundial - easy to make

How to compute the position of the Sun

How to compute the length of a day

My Astro Sources
Applets, Software, Books, Links

Eclipse 1999 Photos

"Sun Eclipse Applet"
Simulation der totalen Sonnenfinsternis In Europa am 11.8.1999

Color Theory
RGB Color System (additive synthesis )
CMY Color System (subtractive synthesis)
including interactive Java-Applets

Paper-Folding Fractals
work sheets with solutions

Chaos Research: Fractals - Chaos - Order:
a lecture, download

You know the "Chaos Game" ?

Java

HTML, JavaScript, Java, Applets:

FAQs, Introduction, Sources, Examples

Astronomy by JavaScript:

• Declination, Equation of Time and Length of Day
• Sunrise, Sunset and Altitude
• Table Sunrise and Sunset

Calculators

"old" computers and mechanical calculators

Humour !
Cartoons for Physicists

Stereograms
Online !

Interessante Links
zu verschiedenen Themen

30th Anniversary of Neil Armstrong's Walk on the Moon