.....Asteroid close approaches happen sometimes, but just how "close" is a close approach? Do this #NASAatHome activity with Dr. Kelly Fast from NASA's #PlanetaryDefense Coordination Office (PDCO) to find out!
— NASA Asteroid Watch (@AsteroidWatch) March 31, 2020
More about NASA’s PDCO: https://t.co/pxKEMkVdRz
Questions? Use #askNASA pic.twitter.com/fkHPLEK17z