Richard Branson has launched his mothership, a craft that will soon launch the first space tourists into the atmosphere. The WhiteKnightTwo carrier aircraft which is named after Branson's mother is capable of reaching a height of 50,000ft. The first passengers are likely to be launched into space in around 18 months time but there is currently no set launch date as safety tests still need to be carried out. More than 250 customers have already paid a $200,000 deposit to be among the first space tourists.