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That's pretty interesting. I'll now be doubting every circle I walk by, questioning if it's even real or just some approximation.

Perfect shapes do not exist on a physical level, so they're all approximations

What about black holes? Do non-rotating ones create perfect spheres?

Have we ever seen a non rotating galaxy or star system?

Which is why I could never truly appreciate calculus.

Circles also don't exist in the core geospatial data library GEOS. You have to approximate them with a polygon that has a lot of vertices.