Users of the Apple iPhone or iTouch should check out SkySafari 1.6 ($14.99). This planetarium app from Southern Stars includes a database of 300,000 stars down to 10th magnitude, 30,000 deep sky-objects, including the entire NGC and IC catalogs, and it renders the Moon and planets in detail. SkySafari accurately shows the sky from any location on Earth, at any time up to 100 years in the past or future. Users of the iPhone 3GS with built-in compass can display the sky in the same direction that you’re holding your phone. Tilting your iPhone also shows the sky at the same altitude angle that you’re holding your phone. The app also includes a new time-flow animation feature, and WiFi telescope control with the additional purchase of a WiFi-to-serial adapter. See Southern Stars website for a complete list of features.
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