As explorenasa followers are really smart on space, we know you'll be into this... Set a timer for 3pm eastern today and scoot over to Twitter where NASA_SLS and BoeingDefense (on Instagram, find boeinglovers) will take questions about Mars exploration. Tag your questions with #SLSInspires #BoeingonMars #JourneyToMars. Answering your humdingers will be NASA #astronaut Mike Barratt, Sharon Cobb and Chris Crumbly of NASA, and Bob Dalee of Boeing. Tweet ya later, space fans! Credit: NASA/Mars Creative #TweetChat #Twitter #spacechat #events exploredeepspace #partners #building #progress #madeinusa🇺🇸