According to this (https://en.m.wikipedia.org/wiki/List_of_objects_at_Lagrange_points) there are currently about 6 satellites at L1 and 5 more planned to be put there.
I don’t understand how they don’t collide with each other since the closer to the centre surely the less fuel needed to stay at L1.
In: 3
The L1 point is 1.5 million kilometers from the Earth. And satellites are small (~ 10 m).
They don’t have to be at the exact mathematical point given by theory (which anyway has its own uncertainty errors) to reap most of the benefits of being at a Lagrange point.
So the probability of hitting one another is very low: negligible.
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