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Astronomy for the Palm OS. Orrery displays the orbital positions of the nine planets around The Sun. Animate the display to easily visualise elongations of Mercury and Venus, and oppositions of the outer planets. In the information window you call call up detailed information for each planet and get its current distance from the Sun. The Sun Rise Set screen shows you the rise, set and transit times of the sun and the end and start times of the twilights. The Planet Rise Set window let's you easily plan your observing sessions showing you the planets' rise, set and transit times and the sun rise and set times and twilights in one graphical display.

Orrery works on all b/w, grey scale and colour Palm OS devices with Palm OS 2.0 or greater.

Update 2.4 (11/25/02)

• Code optimization and OS5 compatibility.
• Support for Tungsten 5 way D-Pad.
• Updated info texts.

• Compatibility with astro-metrics DA

• Leaving the stylus on the planet icons calls up the info window of the selected planet.
• Support for English units in the info texts.
• Rearranged the order of the planets' moons by orbital period.

• Bug fix and code optimization.

• Fixed a bug in the calculation of Alt/Az.

• Fixed previous day length bug which found its way back into 2.0.

• Improved grey scale and colour support.
• Planets Rise/Set view now has an indicator showing the current time.
• The information view has been divided into separate ephemeris and info text screens.
• The ephemeris now include light travel time, Alt/Az, transit time, angular size, magnitude and phase.
• Direct link from the Planets Rise/Set screen to the ephemeris screen.
• Updated info and statistic texts for the planets.

• Fixed bug in the calculation of the day length in the Sun Rise/Set screen for longitudes greater than E100 and W100 degrees.

• Fixed graphic display bug in Planet Rise/Set screen.

• New screen which shows the sun rise, set and twilight times and the planets' rise, set and transit times all represented in one graphical interface.
• The Sun now also has a name pop up in the main orbit screens.
• General code optimisation.

• General code optimisation and optimisation for Palm OS 3.5.
• Support for colour and grey scale.
• Sun rise, transit and set times and times of twilights.
• Planet info includes Right Ascension and Declination and the rise and set times of the planets.
• Revised planet info texts.
• Preference option to invert the graphics display.
• Various small UI improvements.
• Support for Realtime Fulfillment Registration on PalmGear through a temporary registration code.

Update 1.0.1

• Fixes small bug in I/ O push button display.