Shows a graphical representation of the sun's hourly position in degrees above horizon and in relation to the compass points and . Doesn't use GPS, you have to pick a city from a list or enter add latitude and longitude manually.

Adjusts to all screen sizes although the text at the top and bottom of the screen overlaps on smaller screens.

Keys:  Up, Down = change month; Left, Right = change day.

The app "Sun Tracker" (35 KB) is ready to download or send to your phone as filename:"SunTracker".

Contributed by: arnold040
Type: Free Open Source
Vendor:  Vesuvian Software
Data Connection Required: No
Minimum Java ME profile: MIDP 2.0
Screen Size: All
iDEN Compatible: (tested on i776): Yes
Boost CDMA Compatible: (tested on Motorola Rambler): Yes
Supported iDEN phones: All Falcon series (1290, i465, i776, i856, i9, etc.) with Java
Filesize: 35 KB

Displays the current moon phase (new, full, half, etc.), moon age, distance from the earth, latitude and longitude and zodiac sign. Seems accurate except for the latitude and longitude which appears to be invalid (longitude is greater than 180 degrees, I don't think that's possible).

Type: Freeware
Author: Bouncing Elephant
Data Connection Required: No
Screen Size: All
iDEN Compatible: (tested on i776): Yes
Boost CDMA Compatible: (tested on Motorola Rambler): Yes
Supported iDEN phones: All (MIDP1) with Java ( i9, i856, i776, i465, i290, etc.)
Filesize: 28 KB

This looks like a great reference and study guide for astronomy students.

It's a comprehensive database of information about the sun and its planets including; Distance from the Sun, Perihelion (closest), Aphelion (farthest), Equatorial Radius, Equatorial Circumference, Volume, Mass, Density, Surface Area, Equatorial Surface Gravity, Escape Velocity, Rotation Period (Length of Day), Orbit Period (Length of Year), Mean Orbit Velocity, Orbit Eccentricity, Orbit Inclination to Ecliptic, Inclination of Equator to Orbit, Major Atmospheric Constituents, Moons and Rings.

Type: Freeware
Author: gsmdev
Data Connection Required: No
Screen size: All
iDEN Compatible: (tested on i776): Yes
Boost CDMA Compatible: (tested on Motorola Rambler): Yes
Supported iDEN phones: All with Java ( i9, i856, i776, i465, i290, etc.)
Filesize: 14 KB

Several of you requested star map apps and "piggy" found MicroSky for you. It's a planetarium in your pocket which can display the night sky for your location or anywhere in the world. The star maps are stored on the MicroSky server but download quickly, much faster than Google Map, for example.  Before you can use MicroSky you do need to register for an account at www.upto.org/skyserver/editRegistration.do?action=Create&callfr om=microsky but registration free and instant.

Type: Freeware
Vendor: Upto.org - Product Page and Online Help
Data Connection Required: Yes
Supported iDEN phones: All Falcon Series (i776, i465, i9, i290, etc.)