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The giant reflector (~100m?) was intended to make the Ho Chi Minh trail bright enough for starlight scopes and other sensors to work, not turn night into day. Think Venus-bright, not full-moon bright. A similar proposal was made under Destination Mankind/ManStar, to celebrate the US bicentennial. The brightness would have been 1/10 that of a full moon. 


[URL unfurl="true"]http://spaceflighthistory.blogspot.com/search?q=manstar[/URL]


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