Imagine sending a spacecraft the size of an airline cabin bag to the #Moon – what would you have it do? ESA issued that challenge to European teams last year, and two winners have now been chosen. #CubeSatshttps://t.co/EYwFKGC5pf pic.twitter.com/Cj0qlRKXSb
— ESA (@esa) January 23, 2018
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