How would rings realistically affect living on a planet? [worldbuilding]

EmperorPenguin
2025-05-21T23:36:46Z

Ever since I was a kid, I thought planetary rings were cool, and whenever I scribbled a non-specific alien planet I would give it rings. Lately I have been worldbuilding for a story, and naturally I gave the world rings. But since I made that decision, I've paid more attention to rings in other sci-fi I watch.

There's a lot of sci-fi planets out there with their own Saturn-esque rings. Very often it's just there for the vibes. In the opening to Rogue One, for instance, Galen Erso's farm is on a planet with rings, but this doesn't really come up or affect the plot in any way. I forgot this until I recently rewatched the movie. Similarly in the Foundation series on Apple TV+, even though the protagonist is from an ocean planet with rings (that are beautifully rendered), the rings never really come up. The endless ocean ends up driving both plot points in the show and the superstitious culture of the people who live there, but the ring does not. Maybe this is discussed more in the Foundation books but I'm not familiar with those.

Sometimes rings end up being plot relevant, like in Alien Romulus, where instead of being set dressing, the rings are an obstacle that can cause the space station to crash. Still, the rings don't directly impact the planet or the people who live there. The thing that more directly affects the colonists' lives is the atmosphere blocking the sunlight instead.

What really got me thinking was when I saw this Sci-Show video a few months ago about research that Earth possibly had rings about 450 million years ago. The rings lowered the overall global temperature and caused more extreme summers and winters due to light reflecting off of them. This made me realize rings can add quite a lot to the actual worldbuilding, since besides from the obvious cultural impact on any humanoid life, it can cause big environmental changes as well. This is pretty obvious when you consider how The Moon can do many things that affect life on Earth such as the tides.

Of course there's nothing wrong with stories hand waving away these types of questions, but it's interesting when stories like Three Body Problem take these tropes like living in a multi-star system and consider how that would mess with the people living there.

Astronomy nerds and sci-fi fans of Tildes, are there any other interesting ways rings would affect life on a planet?

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