This unique event took place at the same time at SOLEIL and in cities like Bidard, Cannes, Mérignac Toulon and Toulouse. With the help and support of experts of space industry, students, entrepreneurs, researchers, developers, users or even job-seekers gathered in small teams and faced, within 24 hours, one of the 17 challenges proposed by the CNES. The aim of this new experience: to promote the use of spatial technologies, to support employment, environmental concern or even the everyday life of the citizens.