In the quiet arithmetic of orbital motion, two stars — one long dead, one still burning dim — have been sending radio signals across the cosmos with the patience of a lighthouse. Caltech researchers have now traced the mechanism behind these pulses to a synchronized dance of electrons spiraling through magnetic fields, a process ten times more powerful than anyone had calculated. In doing so, they have confirmed a theory born in 1969 from watching Jupiter and its moon Io, reminding us that the universe tends to repeat its most elegant solutions across vastly different scales.