252455615968443048 seconds

252455615968443048 seconds is a sculptural mirror representing a phase of the Sun's death, the so-called "red giant" phase, which will last around a billion years before it collapses to become a "white dwarf". Astronomers estimate that the Sun has around 7 to 8 billion years (252455615968443048 seconds) before it dies out.
The object decays over time, just like the sun, and makes the viewer realise that every second counts.