What if two satellites could float in space, 144 meters apart, but work together so perfectly that they behave like one giant machine? That is the goal of ESA’s new Proba-3 mission, which has just launched on a quest to unlock the secrets of our Sun!
source:https://www.esa.int/kids/en/news/Proba-3_when_two_satellites_are_better_than_one
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