a rocky egg-shaped asteroid

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

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

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

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