How old do I have to be?
Eighteen at the date of launch. There is no upper limit; there is a medical.
Can I bring a camera?
Yes, and the house provides two, with lenses chosen for the dome. Your own camera will be checked for batteries and loose parts.
Will I be sick?
About half of guests feel some discomfort in the first day without weight. It passes. The flight physician will give you something for it before launch if you want it.
Why only four guests?
Because the dome is eighty centimetres across, and four people can lie around it with their heads together.
What if a voyage is postponed?
Your seat moves with it. If the new date does not suit you, the fare is transferable to any other voyage or refundable in full.