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


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 






