Several outfits at the show offered products enabling construction of cubesat and even smaller satellite products including Celestial Circuits, JP Aerospace and Kentucky Space.

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She heads a campaign to protect space junk, arguing that some of the celestial flotsam is of great historical value.

BBC: NEWS | UK | Magazine | One giant (scrap)heap for mankind?

The Outer Space Treaty provides a legal framework for the international use of space for peaceful purposes, including the moon and other celestial bodies.

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The 1967 Outer Space Treaty provides for "free access to all areas of celestial bodies" by any nation, but isn't clear about commercial rights, said Henry Hertzfeld, who researches space policy at George Washington University.

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