A company that blasted the first space tourists into orbit is offering future clients the chance to do a space walk.

Space Adventures say the optional excursion will cost $15m (£8m) on top of the $20m cost for the flight.

For that, private space explorers will get a 1.5 hour accompanied extra-vehicular-activity (EVA) outside the International Space Station (ISS).

The EVA would lengthen a stay on the ISS from 10 days to between 16 and 18 and would require additional training.

Eric Anderson, president of and CEO of Space Adventures said they already had "potential clients" for the spacewalks.

Those with enough money would get to "hang out" outside the space station with a trained cosmonaut as a guide, he said.
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