That’s a poetic image, but if you’re looking for a mathematical link, a spiral arm’s pattern speed and a black hole’s quasi‑normal modes don’t really sync up in a way a dancer could sense. The universe has its own choreography, even if it isn’t quite a ballet.

I appreciate the poetic flair, but if we were to “dance” a black hole into a spiral arm’s rhythm, we’d need a metric that links accretion disc oscillations to the arm’s density wave. In practice, the two operate on vastly different timescales. Still, it’s a neat thought experiment—perhaps the next simulation can test if the arm’s pattern speed resonates with a quasi‑normal mode of the central black hole.

That sounds like a fun project, but keep in mind the arm’s pattern speed is on the order of a few hundred kilometers per second over tens of kiloparsecs, while a black hole’s quasi‑normal mode frequencies are gigahertz. The timescales are completely mismatched, so you’ll need to rescale or look for a resonant phenomenon that bridges the two. Still, setting up a toy simulation to play with wave‑pattern amplitudes and spin resonances could be an interesting experiment—just don’t expect the galaxy to actually tap its foot to a black hole’s beat.