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
You don’t have to be right at the point. Space is gigantic. As long as you’re within a few hundred (or even thousand) miles of the mathematical “point” you still get the benefits of the point and need negligible fuel to stay there. Compared the size of satellites (a few meters), the available space is so huge that it’s not an issue.
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