NASA’s DART asteroid crash: What scientists have learned about Dimorphos so far


Smashing a spacecraft into an asteroid isn’t NASA’s usual approach to planetary science, but it was certainly an opportunity nonetheless.

NASA’s Double Asteroid Redirection Test (DART) spacecraft slammed into a small asteroid called Dimorphos on Sept. 26 to test a potential technique to protect Earth, should we find ourselves on a collision course with a large space rock. But the impact has also given planetary scientists a close, albeit fleeting, view of the smallest asteroid any spacecraft has visited to date.


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