Hera asteroid mission vs. absolutely nothing
In its latest test of readiness for space, ESA's Hera spacecraft for planetary defence is being operated for around three weeks in hard vacuum, while being subjected to the same temperature profiles it will experience during its journey to the Didymos binary asteroid system. The 1.6 + 1.6 + 1.7 m spacecraft was slid inside the 4.5-m diameter, 11.8-m long Phenix thermal vacuum chamber at