The ronnasecond represents 10²⁷ seconds, translating to about 31 quintillion years. This enormous timespan is used strictly in theoretical physics to describe deep-time cosmological events. Researchers use it when modeling the long-term evolution of black holes, the decay of atomic matter, or the ultimate fate of the cosmos. The symbol is Rs.
Heard on the job
We calculate the evaporation time of a supermassive black hole to be several ronnaseconds.