Is NASA really crashing a spacecraft into an asteroid? We sure are — all in the name of planetary defense. The #DARTMission is a technology test to see if an impactor could change the trajectory of an asteroid. Nancy Chabot of Johns Hopkins University Applied Physics Laboratory tells us more. Producers: Jessica Wilde & Scott Bednar Editor: Matthew Schara #NASA #AskAnExpert #DidYouKnow #Asteroid #Space #Astronomy #SolarSystem #Earth #Science #TheMoreYouKnow #Science