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The problem is not holding up the moon but stopping it... well, I mean, the main problem!
• Comment on Re^2: What would be the most significant thing to happen if a rope (or wire) tied the Earth and the Moon together?

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Re^3: What would be the most significant thing to happen if a rope (or wire) tied the Earth and the Moon together?
by BrowserUk (Pope) on Nov 01, 2015 at 20:56 UTC
The problem is not holding up the moon but stopping it...

"Tension" is holding it back; not holding it up.

Actually you'd have to speed the moon up (or slow the Earth down) since the former rotates every 27 days but the latter rotates once a day.

And if you sped the moon up to match the Earth's rotational speed, then the tension on the cable would be hugely increased necessitating a further increase in its diameter.

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Re^3: What would be the most significant thing to happen if a rope (or wire) tied the Earth and the Moon together?
by Ratazong (Monsignor) on Nov 01, 2015 at 21:40 UTC

Yes. Once we get the moon to be stable above one point of the earth, there would be (nearly) no force on the rope, and we might get the effect of a Space Elevator.

But the difficulty would be to get the moon into a suitable position, so it could serve as a counterwight.

This would probably lead to a lot of changes on earth, e.g related to the tides. Or to Astrology. But I'd like to focus on the opportunities, e.g rope-climbing-competitions ;-)

The geostationary distance is the same for all bodies at 36000 km (IIRC).

Are you aware about the tide caused by a moon at that distance?

Giant amounts of water alone would swap to the "moon side" of the world, not talking about earth quakes and volcanoes erupting.

Cheers Rolf
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##### update

If I'm not wrong moon's gravitational impact at only 10% of it's normal distance would be 100 times stronger than now. That's not even a Bruce Willis movie anymore.

Don't forget the hump of water on the opposite side of the earth. And the lowered water levels 90 degrees from that.

Knowing the effects, it will be a Simple Matter Of Politics to decide where to place the moon.