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More than 500 people have signed up to travel on SpaceShipTwo, including Ashton Kutcher, star of the TV show Two and a Half Men.
The carbon composite craft is 60 feet long and can carry six passengers and two pilots.
It's designed to launch from a mothership, WhiteKnightTwo, at around 50,000 feet and will use a hybrid rocket motor to ascend to the edge of space.
The ship will travel high enough to give passengers a glimpse of the curvature of the earth.
Photo: Nick Heath