As ESA’s Hera mission reaches the Didymos double asteroid system, it will not be there alone: it will also serve as mothership for Europe’s first two ‘CubeSats’ into deep space. Juventas, performing subsurface radar sounding, is called after the daughter of Hera. The other, spectral surveyor Milani, takes the name of the researcher who began Europe’s asteroid risk monitoring system and came up with the original concept inspiring Hera and NASA’s DART – a double spacecraft mission for planetary defence.
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Source: ESA Space Engineering & Technology