NASA @NASA
Changing the motion of an asteroid? Our #DARTMission is set to be the first to try it. NASA planetary defender Dr. Kelly Fast will answer your questions in a live Q&A today. 4:30pm ET (20:30 UTC). Submit questions using #AskNASA & set a reminder to watch: https://t.co/7BWG7dF1gj https://t.co/UyZWIZEO2u — PolitiTweet.org