As of this writing, iStellar is the only app that includes artwork for all 88 constellations. Users will especially appreciate the beautiful full-color stars and constellation artwork. It starts up quickly, draws gorgeous sky images, and is very easy to use. Each is good in its own ways, and each has its weaknesses. There are now seven serious star-charting apps in the iTunes Store (as of 30 January 2009). Free choice of location and time zone, instant setting with GPS Easy moving through the sky by dragging, and centering by double-tap Switches screen according to the device's orientation Beautiful animation (real-time, adjusted time, reversal) Adjustable moonlight and light polution Solar eclipse simulation with high accuracy Data can be downloaded whenever available Comets with accurate position and magnitude. Shows name, line and picture for all constellations Displays the Sun, daylight, twilight, the Moon (with shape and phase), 8 planets, Pluto ![]() Simulates distortion (atmospheric refraction and extinction) at low altitude Over 16,000 star data, with name for 254 stars The star chart can be rotated from portrait to landscape, and you can even fix the location via GPS (only for iPhone 3G). It is optimized for Multi-Touch control, allowing you to operate intuitively drag to move the star chart, pinch to zoom in and out, and so on. IStellar is a planetarium App that shows the starry sky seen from the place and time of your choice.
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