The quettasecond represents 10³⁰ seconds, an unimaginably long duration equivalent to roughly 31 sextillion years. This unit far exceeds the current age of the universe. It serves purely theoretical purposes in physics and cosmology, such as calculating the hypothetical half-life of a proton or the eventual heat death of the universe. The symbol is Qs.
Heard on the job
Proton decay models suggest a half-life somewhere in the range of a few quettaseconds.