Move over, Bruce Willis: NASA is shoving an asteroid to test planetary defense

This illustration shows the DART spacecraft approaching the two asteroids, Didymos and Dimorphos, with a small observing spacecraft nearby.

Hollywood likes to blow up incoming asteroids with nukes, but NASA's first test of whether it can change the trajectory of a space rock will try just giving one a little nudge.

(Image credit: Credit: NASA/Johns Hopkins APL/Steve Gribben)



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