Now safely in space, the two satellites are heading into an orbit that stretches 60,000 kilometers away from Earth – far enough to get a perfect uninterrupted view of the Sun. After a short setup period, the satellites will begin their incredible “space ballet”, flying in formation to perform their experiments. Proba-3 is like a carefully choreographed space dance, with the two satellites flying exactly 144 meters apart, precise to just a few millimeters. This makes it the world’s first precision formation flying mission!
source:https://www.esa.int/kids/en/news/Proba-3_when_two_satellites_are_better_than_one
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