Dawn's navigators placed the spacecraft on a close approach trajectory with Mars so the planet's gravitational influence would provide a kick to the spacecraft's velocity. If Dawn had to perform these orbital adjustments on its own, with no Mars gravitational deflection, the spacecraft would have had to fire up its engines and change velocity by more than 9,330 ki Am vazut multe ceasuri superbe pe www.topceas.ro |
Thursday, August 13, 2009
provide
Labels:
life