Do not be embarrassed by your failures, learn from them and start again.

Two heads are definitely better than one and by sourcing ideas from each other, you have a better chance of coming up with a strategy that will allow your business to overcome a setback or challenge.

Follow your instincts and live with the consequences.

Please don’t get hung up on this question of whether you need to have experience in an industry before you launch your startup.

I've used the Phoenix Centrifuge to replicate what the body's going to go through on the flight up. I've also done some gravity tests with ZERO-G [a charter-flight service in Arlington, Va., that uses modified Boeing 727s to simulate weightlessness], which went great.

Life's too short. If you're passionate - stand up.

The jet stream is a very strong force and pushing a balloon into it is like pushing up against a brick wall, but once we got into it, we found that, remarkably, the balloon went whatever speed the wind went.