The locations of planets Mercury and. Mars at sunset on Feb. 16, 2013, are shown in this NASA sky map. Sat., Feb. 16, evening twilight. This is the best opportunity this year for observers in the ...
Although there is no Android version, this slick Apple-exclusive stargazing app comes in a visually-stunning free version with two in-app upgrades for serious users. Why you can trust Space.com Our ...
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