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# Could You Connect A Rope From A Geostationary Satellite To Earth?

Say you want to bring some supplies up to your satellite... could you just lower a rope down to earth and haul it up?

Photo: tanakawho (Flickr)

A rope, even this metal one, would not be able to lift something from earth to a geostationary satellite.

A geostationary satellite orbits the equator in the same direction and speed the earth turns. That means the satellite stays stationary with respect to the ground. It seems to be hanging in mid-air — if, by mid-air, you mean 22,500 miles high.

### Imagine…

Imagine yourself sitting inside a geostationary satellite. You want to bring up some supplies from earth.

Why not let down a long rope? After all, your satellite will always be over the same spot of ground. Someone could stand under you, wait for the rope to come down, and tie off a cooler full of soda.
It sounds funny, but would it work? Is this just an odd way to do things or is it impossible?

### Nope, That’s Impossible!

In fact, it is impossible, and here’s why…

When you haul something up by rope, you generally think of the object being lifted as the weight. Something we don’t consider is that the rope has to be able to lift itself too.

### The Rope Must Lift Itself Too

Lift itself!?! What does that mean?

Think of it this way. If a ten-foot rope is hanging straight down, the top one inch is supporting the weight of almost ten feet of rope. That’s no problem, but what about a hundred feet? Still no problem? How about a hundred miles?

### No Rope Can Support That Much Weight

In fact, no rope could support 22,000 miles of its own weight. Not even a cable of the mightiest steel would work.

In fact, there is no material you could use that wouldn’t snap under its own weight long before it reached from earth to satellite. And that’s without even adding the weight of the cooler!

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• Luciano Silva

Is there a way to compensate maybe with high altitude baloons and the weight should only be calculate where there is gravity right ?

• Dustin Thurston

I sure you could probably figure out a way to support the first 10 miles with some huge balloons, but that’s not even significant compared to 22,500 miles. Not to mention the weight of the rope would yank the satellite out of the sky. Yes, the weight of the rope would start decreasing as you approached the satellite, so that might cut the total weight in half, but that’s still not even close. We’d need a strong, but nearly weightless material. Then you would have to move the satellite even further away to put a centripetal force on it so that the rope wouldn’t pull the satellite back down.

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