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A little circle in the sky view will reveal the position of that star. Perhaps this is a lesson to would-be time travelers.Īt the screen's upper left are a down-arrow, a circle with a star in it, and the designation (such as 'HIP 32012') for the star closest to the position where you last tapped the screen. I found the time controls tricky to master and sometimes nonresponsivereturning to the present was harder that it should have been. You can also make time pass backward or forwardand watch the stars move across the skyby dragging your finger across the screen. (Opens in a new window) Read Our Star Chart (for iPad) Review The Play arrow returns time to its normal rate of passage, and the Hourglass arrow returns you to the present. Likewise, Forward lets you move forward in time at hyper-speed, and watch the motion of the stars over the course of a night, then the arrival of the day, followed by another night, etc. Backward makes time run backwards, and each time you tap the arrow, it speeds up the rate of time by an order of magnitude. Tapping the time enlarges it and brings up four arrow keys if I had to label them I'd call them Backward, Play, Forward, and Hourglass.

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You can pinch or stretch the screen for wide-field or zoom views, or use the plus and minus buttons at the bottom of the screen.Īt the lower left is a clock showing the date and time, down to the second.

Pointing your iPad at the sky will reveal the stars or planets visible in that direction. The night-sky view is also appealing andfor the most partrealistic looking. Read our editorial mission (Opens in a new window) & see how we test (Opens in a new window). Since 1982, PCMag has tested and rated thousands of products to help you make better buying decisions. Stellarium does a very good job in depicting the changing light of twilight. In daylight, unlike some programs that still show a star-filled sky, Stellarium only shows the objects you can see in daylight (the Sun, the Moon, and Venus). In daytime, when it's unsure of your location or in what direction you're facing, it fast-forwards the time to the evening to show the night sky otherwise it shows the sky at the current hour. When you open the app, you're presented with a view of the sky. I tested Stellarium Mobile with an iPad Air ($389.99 at eBay) (Opens in a new window), though it's also usable on an iPhone ( at Amazon) (Opens in a new window). Though it loses a few features, it retains the program's beautiful, and for the most part realistic-looking, depiction of the heavens. Stellarium Mobile (for iPad), created by two of the developers of the desktop versions of Stellarium, brings the program to your iOS device. Stellarium is a well-known name to astronomy buffs that have long used the open-source program on Windows, Mac, or Linux desktops.

Planets not shown to their true brightness.

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