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Along this line of thinking I was wondering how much energy it would take to reach the height of one of the lagrangian points? And once we get there would it be possible to stay there and resist the pull of earth?

If so that would be cheap space access right there.

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Seriously a downvote? Why not explain why it's wrong?

IIRC, it takes just as much energy to reach L4 (or L5) as to reach the Moon--they're in the same orbit.

If you've got settlers on the Moon, or beyond the Earth-Moon system, L4 is probably a good place to build a commercial and industrial outpost; but, for your only space installation, something lower down is much cheaper.

I'm talking about earth sun Lagrange points. Those wouldn't be orbiting the moon.

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