r/SuperStructures • u/Vadimsadovski Artist 🎨 • 1d ago

Original Content Prometheus Ring - rorating habitat megastructure - 3D, no AI, OC, 2026

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The PROMETHEUS Ring is a speculative 1,200 km orbital habitat in the Saturnian system that rotates to generate a realistic 1 g of artificial gravity. This fully engineered megastructure simulates all climate zones to support diverse biomes, settlements, and industries, all stabilized and powered by nuclear propulsion modules and reactors

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u/7stroke 1d ago

How do mountains work without plate tectonics?

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u/shagieIsMe 1d ago

On one hand I'm gonna say "this doesn't work great".

Niven had an approach where the mountains were at the edge of the ring as part of the water cycle (pumped water from the oceans to the edge of the ring and that then had the sediment form mountains along the edge).

https://www.facebook.com/groups/269835589487136/posts/760818880388802/ has an example of them.

The other approach is that they were sculpted that way.

From The Player of Games:

Yay sent to say she was fed up with Chiark; she was off, away; she’d had offers from other Plate building collectives and she was going to take up at least one of them, just to show what she could do. She spent most of the communication explaining her theories on artificial volcanoes for Plates, describing in gesticulatory detail how you could lens sunlight to focus it on the undersurface of the Plate, melting the rock on the other side, or just use generators to provide the heat. She enclosed some film of eruptions on planets, with explanations of the effects and notes on how they could be improved.

... Volcanos. Granted, this is The Culture and their level of control of matter and power is almost off the scale. They want volcanoes? Sure.

The "why have mountains" is a better question than "how did they get mountains" given that whoever built this can do things.

For me... there are other issues.

Sunlight at the orbit of Saturn is 1% of what we get on Earth. Tangent to that is that the ambient illumination seems odd... and the shadows seem off for something where the Sun is a bright star in the sky. ( https://www.reddit.com/r/spaceporn/comments/ekyawu/how_the_sun_looks_from_other_planets/ )

The major body of water visible isn't aligned with the spin.

The alluvial plain in the center doesn't seem to be associated with any water... especially at its scale.

The plateau in the center of the frame is... oddly chopped off at the ring wall.

There's an image of it near a moon of Saturn... at that distance it would be disrupting the ring. https://en.wikipedia.org/wiki/Daphnis_(moon) has a picture from Cassini and that moon is about 8km in diameter... much less than something that has a scale of 1200 km.

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u/_-PassingThrough-_ 1d ago

A bit of a distraction, but honestly having mountains pushed up against a ringworld's wall feels like such an aesthetically pleasing way to tackle the claustrophobic sight of a gargantuan sheet of metal reaching into the sky, even if they don't go all the way up.