Quote:
Originally Posted by Bring_Back_Shantz
There are thrusters to slow it down, but it'll be pretty minimal changes.
As for a force at L2 that stops it, not really, but also kind of.
Essentially they've given in just enough of a push to get there with essentially zero speed (relative to earth).
It's kid of like putting up hill. You give it just enough of a push to get to the cup, and then it falls in.
They've given it enough of a push to get to L2, and when it gets there it'll settle into orbit around it (with some minor adjustments).
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Webb doesn't have reverse thrusters, the thrusters would be detrimental to keeping the telescope cold. They are doing it by using just enough speed to insert in orbit. It does have forward thrusters for station keeping though.