ahlam1399
07-03-2016, 04:55 PM
Space navigation is tricky. There's ** up or down, ** left or right, and ** road signs. This device uses stars to help determine if a spacecraft is off course. It takes nifty pictures, too.
أكثر... (http://www.npr.org/2016/07/03/484259562/star-trackers-help-ju**-find-its-way?utm_medium=RSS&utm_campaign=news)
أكثر... (http://www.npr.org/2016/07/03/484259562/star-trackers-help-ju**-find-its-way?utm_medium=RSS&utm_campaign=news)