Quibble - that *point* is known as L2, the Second Lagrange Point.

Unlike L4 and L5, L2 is not a local gravitational potential energy minimum, which means that it's unstable, which means that the telescope will have to make periodic small adjustments to stay in the same spot. (I'm sure you know all this stuff of course.)

This is the first I heard of this, and it's a very clever idea indeed - confine almost all the electromagnetic noise to one fairly small area in the field of view and then block it out with a shield.

The way I see it, orbiting at a Lagrange Point is one of the most logical and therefore least weird orbits you can come up with. But then I think weird.

Thanks for this fascinating article!