"From the perspective of a potential space tourist, I certainly wouldn't wait to see what happens," he said.
Who will qualify space tourists as fit for travel?
Some space tourists have signed contracts with third parties to conduct certain research activities while in orbit.
The two space tourists so far have paid millions of dollars to fly on Russian craft.
The effort ended because of a conflicting bid from another prospective space tourist.
This was to have been followed by more missions, including flights with space tourists.
Partly because of this effort, she dislikes being called a "space tourist."
It predicts that the first space tourist would have flown around the year 2000.
True, that's not cheap, but it's a whole lot better than the $25 million that other space tourists have paid.
More than 65,000 would-be space tourists applied for the first batch of 100 tickets.
Wörterbuch für astronautische Begriffe