SCENE + HEARD: Daily Post NASA Practices 'Planetary Defense' By Staff Tuesday, September 27, 2022 12:56 PM This week, NASA's Double Asteroid Redirection Test (DART) made impact with an asteroid, after 10 months in space. NASA says this is the "world’s first planetary defense technology demonstration," showcasing that NASA can deflect an asteroid if need be. Head over to the NASA website to learn more about this mission, or to NASA's Twitter account to watch a video of the impact.