NASA Science News for Sept. 16, 2015
NASA's MMS spacecraft are flying around Earth in a precise formation made possible by an out-of-this-world system of GPS navigators.
SCIENCECAST VIDEO: http://youtu.be/taMzKcehfGw (http://youtu.be/taMzKcehfGw)
FULL STORY: http://science.nasa.gov/science-news/science-at-nasa/2015/16sep_gps/ (http://science.nasa.gov/science-news/science-at-nasa/2015/16sep_gps/)