Four-time space shuttle astronaut Andy Thomas is no fan of Sir Richard Branson’s SpaceShipTwo suborbital tourism vehicle, the Australian Broadcasting Corporation (ABC) reports.
“It’s really just a high altitude aeroplane flight and a dangerous one at that.”
He said the technology for the spacecraft had little room to grow.
“I think, as a technology to get humans out into space, it’s a go-nowhere, dead-end technology,” he said.
“You can’t grow it, you can’t make it big enough.”