Tweet Chat with Joe and Mark!

After spending 168 days on the International Space Station, NASANational Aeronautics and Space Administration astronauts Joe Acaba and Mark Vande Hei returned to Earth on February 26th. If you are curious about their time in space and all the cool science they had a chance to work on, an opportunity to ask questions happens on Tuesday, March 6 when you can Tweet your questions to #AskAstro.  Joe will answer questions at @AstroAcaba from 1:15 – 1:45 CST while Mark will be available at @Astro_Sabot from 2:55 – 3:30 the same day.