Planisphere computes and plots the local sky in real-time or for a fixed date.The sky view is updated every 4 minutes which is roughly equivalent to a sky motion of 1 degree.ESSENTIAL FEATURES- Stars plotted in spectral colors- Stars up to magnitude 5- Constellation lines- Positions of sun and moon- Positions of the planets- Compass- Solar system ephemerides- Night and daytime view modes- Sidereal time display- Sun rise and set times- Twilight times, daylight durtion- Moon rise and set times- Moon phase image- Time inc/dec in 30 min intervals- Save planisphere image to microSD- Day/night terminator map, plus 3D Earth globe- Relative positions of Sun-Earth-Moon trio- GPS-enabled or manual input- No internet connection required- Runs in full-screen portrait mode- Clean, intuitive interface, thus simple operation- Help in Menu/Settingsご購入をお考えのお客様へ、本アプリーに関するご質問は日本語でもお受けしております。お気軽にお問い合わせください。Keywords: astronomy, planisphere, sun, moon, earth, moon calendar, moon phase, twilightBEFORE YOU PURCHASE:Galaxy Precident SCH-M828C and similarly small phones not supported.1. This application is designed for phones and is tested only with a 10inch tablet.2. Please appreciate that the author cannot purchase all hardware and provider contracts for the large number of Android devices currently on the market. Please be so kind as to send a report preferably with screen snap should you encounter any layout issues.3. This application requires Android 2.2 or higher and a display which is to the Android standard.4. This application operates in portrait mode only.5. Please contact the author, if you have any pre-sales questions.