Space X’s Dragon spacecraft will be saying goodbye to the Earth this Sunday and heading to the International Space Station with supplies for the astronauts there. It’s the first of 12 planned flights with cargo for the ship (Dragon made a successful test run to the ISS last May), and private exploration company Space X is under contract with NASA to ferry supplies and waste back and forth.

To get some inside insight, Wired hosted a video conference with SpaceX CEO Elon Musk and NASA administrator Charles Bolden using crowd-sourced questions.