Traveling to remote locations sometimes involves navigating through stop-and-go traffic, traversing long stretches of highway and maneuvering sharp turns and steep hills. The same can be said for guiding spacecraft to far-flung destinations in space. It isn't always a straight shot.
Fuente : http://www.eurekalert.org/pub_releases/2013-07/nsf...
Fuente : http://www.eurekalert.org/pub_releases/2013-07/nsf...