DO NOT GO ON THIS RIDE!! I too got sick and queasy from Star Tours and Mission Space is about 10 times worse than that!! It wasn't just me either. I was with my family which consisted of about 7 people all together and we all felt like throwing up afterwards. They even have throw up bags INSIDE of the ride as you sit down in your seat. Obviously they are there for a reason.
Look, I'm telling you to just NOT go on this ride. It isn't worth it. When it first started up I actually panicked because I couldn't breathe for a few long seconds. It eventually stopped and I was able to catch my breath, but after that happened I was begging for the ride to stop because I felt so sick.