 For the culmination of its three-year mission the probe left its orbit around our nearest neighbor and smashed into the Lake of Excellence at around 4,500 mph.
<clarity>  For the culmination of its three-year mission the probe left its orbit around our nearest neighbor and smashed into the Lake of Excellence at around 4,500 mph.
 For the culmination of its three-year mission the probe left its orbit around our nearest neighbor and smashed into the at around 4,500 mph.