Well, that's cool. Sure hope that it didn't just knock it into a collision path with earth. Or, it might be bad if it was an alien ship disguised as an asteroid. Two bad things that could be? 
www.foxnews.com


NASA’s DART spacecraft slams into asteroid to knock it off its path
NASA's DART spacecraft has successfully collided with an asteroid as part of a test to prepare the Earth for defensive measures against possible threats in the future.