For the first time ever, civilians have stepped out into space. 

Billionaire Jared Isaacman and company crew trainer Sarah Gillis have achieved the first commercial spacewalk outside their SpaceX capsule while in orbit. 

The pair were testing new spacesuits, designed to be low-cost and easy-to-manufacture for future missions flying to the Moon or Mars. 

US Correspondent Richard Arnold told Mike Hosking that the mission is likely to have tallied into the hundreds of millions of dollars. 

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