The only firm arranging private trips to the International Space Station has added an extra perk.
For an additional $15 million (on top of the $20 million for a basic trip), the Virginia-based firm Space Adventures will set up a 90-minute spacewalk and extend the orbital trip by up to eight days.
Under the plan, paying spacewalkers would wear a Russian-built spacesuit and would be tethered to the station.
The space traveler would make one orbit around Earth and experience orbital sunrise and sunset.
Three space tourists have visited the space station and a fourth, Japanese businessman Daisuke Enomoto, is set to rocket to ISS in September.