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GeoAstro Applets

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Please be patient, 160 kB of Java byte code have to be loaded ...

Enable Java to run the applet !

The world map is from Mac OS system software. Copyright by Apple Computer, Inc.

Location:	Select your location from the menu list, or
	enter decimal degree values for Latitude and press return key, Longitude and press return key
	or simply click into the word map.
Look up your coordinates:	location database of DLR (Deutsches Zentrum für Luft- und Raumfahrt): 2 million towns and villages world-wide, or in the database here, or for North American cities here.
Key commands:	you may use the keys "m", "d", "h", "n" to increase the month, date, hour, or minute, or Shift key and "m", "d", "h", "n" to decrease the month, date, hour, or minute ! Click the applet first !
	you may enter your home location and change the horizon view image
All data	can be written to data window
Explore eclipses	Check out the days of New Moon and Full Moon and look for Eclipses of the Sun or the Moon. Details here.
Please report bugs !	Interactive time zone map of countries around the world

How to get the full applet version

  Version francaise par Yvan Lemay  

Sun Calulator JavaScripts

What the applet SHOULD look like Watch animations The "real" Sun and Moon

Applet details:	horizon view of the Sun and Moon twilight user input / latitude and longitude home location rise, transit and setting sun clock world map gnomon shadow age of the Moon, phase, illumination previous/next New Moon terminator of the Moon, bright limb	time zone offset altitude and azimuth declination and Greenwich Hour Angle (GHA) equation of time Java Console date and time menus and key commands moon orbit and celestial equator visibility of the moon Movie: Full moon during the year Eclipses of the Sun and the Moon
Basics	Positional Astronomy and Ephemerides The horizontal system The celestial sphere Apparent movement of a star (Walter Fendt) How to compute the position of the Sun How to compute the length of a day How to get sunrise and sunset by a geometrical construction Computing the approximate elevation of the Sun by an Excel spread-sheet Books
Please visit my pages:	GeoAstro Applets Overview (JARS Top Rated) Sun Clock Applet Collection

Output to a Data Window:   The coordinates of the Sun: longitude L: geocentric, apparent, true equinox of date Right Ascension and Declination: apparent, true equinox of date Compare data with U.S. Naval Observatory Astronomical Applications Department - Data Services For a table of rise, set and twilight times visit my "Daylight Applet" Compare sunrise and sunset times Last Modified: 2008, Jul 15