We’ve got our eyes on the skies! 👀 ⁣ The vast majority of large asteroids are known to us, and thankfully none of those pose a threat to Earth. But space is big, so we're always on the lookout! In this short video, NASA expert Amy Mainzer talks about planetary defense. 💪 ⁣ Credit: NASA⁣ ⁣ #NASA #Asteroids #OuterSpace #BePrepared