Saturn Space Elevator

Tom Kalbfus · 2016-04-11 09:46:34

I got an idea for a space elevator. How about one around Saturn? Saturn has a rotational period of 10.2336 hours, and the synchronous orbit for it is at a radius of 109,275 km, Saturn's equatorial radius is 60,268 km thus a space elevator around Saturn would be 49,007 km long. This puts synchronous orbit in the middle of Saturn's B ring. On Earth the distance is 35,786 km, or 29,386 km after subtracting Earth's radius. That means a Saturnian Space Elevator would be 19,621 km longer than an Earth Space elevator. Fortunately Saturn has rings, the closest ones are at 66,900 km from the center, the furthest ones are 480,000 km from the center. These rings could be used as construction materials for the Elevator and the rest can be used to support the weight of the elevator at various distances from Saturn, using an orbital Space Fountain concept, in other words transferring some of the momentum of the ring particles to the space elevator to support its weight. Helpfully, most of these ring particles all orbit in the same plane. The bottom portion of the elevator could dangle within Saturn's atmosphere. The elevator could be used to mine Saturn, and to get humans and other cargo into and out of Saturn's atmosphere without expending too much rocket propellant. Saturn's atmosphere would be valuable in a fusion economy, especially when it comes to obtaining that rare element Helium-3. Saturn is probably the most hospitable gas giant for humans, (although that isn't saying much) The gravity is about the same as Earth. (Varies with latitude due to Saturn's spin) Saturn could be said to be the warmest gas giant with Earth-normal gravity, but more importantly, it is closest to Earth, Uranus and Neptune are further away. Saturn's ring system could be used to help extract Helium-3 from Saturn's atmosphere. People could also live in Saturn's atmosphere either dangling at the end of a space elevator or by using hot hydrogen balloons to remain aloft.

Here is a diagram of Saturn and its rings.

Here is a map of Saturn's radiation belts. As you can see, the rings are in a relatively radiation free zone, the hazardous radiation belts are outside the ring system. I think that's in part because the rings stop charged particles, who's orbits intersect them, a ring particle, being largely made of ice, make an effective radiation shield, and since this radiation goes around in circles around Saturn, the rings prevent them from making a complete circle within the ring radius.

Here is the top down view of Saturn and its rings. Imagine if we could turn those rings into a space elevator(s). You probably need some nanotechnology or von-neuman machines to build space elevators out of these ring materials. The Elevator itself would take the form of a wall, sort of like a phonograph record. I think there is enough material here that a wall could be solidified out of this ring and the ring itself lowered down into Saturn's atmosphere. Then some transport mechanism would absorb the hydrogen from its atmosphere, and transport it up the to outer edge of the rings, where the hydrogen would be packaged and flung on an intercept orbit with Venus, where that hydrogen may be combined with the oxygen in Venus carbon-dioxide atmosphere to make oceans for that planet.

tahanson43206 · 2025-06-11 09:56:01

This topic showed up when I was looking for topics about Space Elevators.

This post is reserved for an index to posts by NewMars members.

It is unlikely any will occur, because the topic was unanswered until now.

Index:

(th)

Void · 2025-06-11 11:55:01

Tom's imagination and efforts were helpful in broadening the conversation.

But if we go for Helium-3, what might be the economic competition?

On Titan, if you had a form of Fusion, a Deuterium-Deuterium type of fusion, this is radioactive and eventually damages the reactor, but it creates Tritium.

If you made big vaults underground to store the Tritium, then over time it converts to Helium-3.

Titan does not have a water-based biosphere, so you could have dumping grounds for old damaged reactor parts to let them "Cool-Down". Maybe in sealed vaults under the ice.

Using robot labor, it might be possible to recycle the old reactor materials, to make new ones. They would not have to be completely safe for humans as robots would build and run them.

Where the original materials for reactors on Titan would come from, I am not sure. Some people think that the equatorial dunes on Titan are comet dust. Well maybe.

So, the point I am making is that a space elevator to get Helium-3 may be less productive than manufacturing it.

I base my understand on this on what I have read about the Helion reactor concepts.

https://www.helionenergy.com/articles/e … ce-d-he-3/
Quote:

Explaining Helion’s fusion fuel: D-He-3
Dr. David Kirtley, CEO

Quote:

Helion Energy uses a unique fusion fuel called Deuterium-Helium-3 (D-He-3). Helium-3 is a rare form of helium, extracted from natural gas fields in trace amounts and formed from tritium β-decay. Helium-3 atoms become a superfluid at the temperature of 2.491 mK. Helion Energy's project aims to achieve commercial nuclear fusion using Magneto-Inertial Fusion.
Helion
+3

So, a world like Titan might specialize in making Helium-3, and exporting it. The fusion involving Helium-3 is valued as it produces much less harmful radiation.

A Helion D-D fusion will produce harmful radiation but Titan has lots of shielding materials, and liquid water phase is not normal on the surface, so if you put old radiated reactor parts into a place of isolation, such as an ice cave below the surface, it might be that the radioactive decay would drop enough that new reactors could be made from those materials.

Particularly if robots are to build and run the somewhat radioactive reactors.

Of course some other reactor may turn out to be better, or not.

But then the problem of a space elevator for Saturn, where the rings are regularly bombarding the planet with debris, may not have as good a payoff for cost of effort.

Ending Pending

But perhaps Calliban can give us better guidance in this.

Ending Pending

Last edited by Void (2025-06-11 12:08:53)

New Mars Forums

Announcement

#1 2016-04-11 09:46:34

Saturn Space Elevator

#2 2025-06-11 09:56:01

Re: Saturn Space Elevator

#3 2025-06-11 11:55:01

Re: Saturn Space Elevator

Board footer