
GeoAstro Applets 
Astronomy 
Chaos Game 
Java 
Miscel laneous 
Physics Quiz 
Who is Who ? 
News and Updates 


Applet: Triangle  
Applet: The Educated
Monkey 

Applet: Sieve for Prime Numbers (Hyperbola)  
Applet: Sieve for Prime
Numbers (Parabola) 

Applet: Free Fall with
Air Resistance 

Applet: Rainbow
Simulation 

Applet: Map Projections 

Physics and Astronomy on
stamps 

Applet: Graphical Construction of an Astrolabe  
Applet: Maya Tzolkin Calendar  
Applet: Astrolab
Graphical Construction 

Applet: Neper Multiplication  
Applet: GenailleLucas
Division 

Applet: GenailleLucas
Multiplication 

Applet:
Draw Analemma 

Applet: Moon
Flight 

Applet:
Hohmann Transfer Orbit 

Applet: Random
Walk 

Applet: Entropy  
Applet:
Transit of Venus 2012,
June 5/6 

Applet: Rise,
Transit, and Set of the
Sun, Moon, and Planets 

Applets:
Geometric solution of
quadratic equations (4
applets) 

Applet: Dürer's Construction of Spirals  
Applet:
Durer's Construction of a
horizontal and a vertical
sundial 

Applet:
Earth View from the Moon
(somnium) 

Applet: Bright
Stars, angular separation 

Applet: Venus Transit
2012 

Applet: Eccentric Sun
Motion 

Applet: Gnomon  
Applet:
Sun and Moon Lozenge 

Applet: Sunrise and Sunset 

Applet: SunEarth Distance 

Applet: Astronomical Gearing 

Applet: The Earth's Shape 

Applet: Circle Inversion (Hollow Earth
Simulation) 

Applet:
Sun Tables 

Applet:
Declination, and Equation of Time 

Applet:
Azimuthal
Orthographic Sundial Applet 

Applet:
FosterLambert Sundial Applet 

Applet:
Planet Observer 

Jovian
Moons 

Applet:Limb
Darkening
of
the Sun 

Applet:Solar Rotation 

Applet:Lunar
Libration 

Applet:
Lunar Distance Navigation 

Applet:
Pingre Sundial (multiple gnomons) 

Applet: Babylonian, Italian, and Unequal Hours Sundial  
Applet:
Cone Sundial 

Applet:
Solstice Daylight 

Applet:
Bifilar Sundial 

Applet: The Sun's Meridian Transit  
Overview
(applets): Medieval and Renaissance
dials and quadrants 

Applet:
Altitude Sundial Interactive simulation 

Applet:
North Finder Sundial Interactive simulation of a selfaligning dial 

Applet: Spider Sundial Interactive simulation 

Applet: Apian Dial Interactive simulation 

Applet:
Capuchin Dial Interactive simulation 

Applet:
Quadratum Horarium Generale (Regiomontanus Dial) Interactive simulation 

Applet:
Gunter's Quadrant Interactive simulation 

Twilight
Sky Compass: Navigation by polarized skylight 

Determining the
relative orbital radius of Mars: Observations and computations of the opposition of 2007 

Determining
the relative radius of the Moon: Observation of the total lunar eclipse of Feb 2008 

Details
of the visibility of the bright planets: phase, elongation, magnitude, illuminated fraction 




Sunrise and Sunset Calculator by JavaScript (equations included) 



Java Applets 

Sundial
in a Box 

Howard
Sun Compass 

Planetary
Hours Clock 

Sidereal
Sundial This horizontal sundial is showing the local sidereal time 

Folding a
Circle 

SunMoon Clock local solar and lunar time 

Levania Selenocentric motion of the sun and the Earth 

Standard Solar
Model 

MoonLight  
Solar
Terminator lines of simultaneous sunrise ans sunset lines of equal solar altitude 

Geocentric Planet Motion  
Cylinder Sundial Applet  
Stereogram Applet  
Lagrange Points Applet  
Moon Libration Applet  

Pursuing the Sun 






New Moon Observer 


Atmospheric Refraction 






Kepler's Applet 




Sky Map 










Planet
Applet 




Moon 


Moon
Motion 




Water
Tube Applet 




Horizontal Sundial  very easy to make 


Night
Hours 


Astronomy
applets: 


My "GeoAstro Applet Collection" Sunshine
Applet (JARS Top Rated) Sun and
Moon in Polar Coordinates 




Analemma Sunclock Applet Make your own sundial ! Paper Sundial  very easy to make by folding a sheet of paper 


Sun
Shadow Applet 


Sun
Plotter Applet 


Sun & Moon Polar: positions of sun and moon in polar coordinates for any location and time 


Daylight Applet 




"Sun, Moon & Earth Applet" JARS
TOP 25% Rated 


"Sun & Earth
Applet" (JARS TOP 5 % Rated) 


Day & Night 
Applet JARS
TOP 25% Rated 





Astronomy 


Solar eclipses and the Saros cycle How to compute the position of the Sun How to compute the length of a day 


My Astro Sources 









Miscellaneous 






