The lights of the universe can disappear in “just” 1078 years, even though they are the long-lasting ones. That is an utterly unimaginable distance in the future but it reflects a lovely contraction of the previous prediction that the energy remnants of the universe might last 101100 years.
The transformation involves reconsidering a well-known quantum magic that was initially advanced in 1975. This theory was contested by Stephen Hawking, who called on them to not be perfectly black: quantum fluctuations at the edge of a black hole can be used to temporarily create pairs of particles into real energy loss, emitting radiation and decrease the mass of the object slowly. In the classical image, the starring role is the event horizon, as it is the one-way surface that assists in splitting these groups of particles, that is, in separating the one group that falls in and the other that escapes.
Having changed the focus of horizons to geometry, a group at Radboud University, Heino Falcke, Michael Wondrak, and Walter van Suijlekom, has narrowed that narrative. Within their scheme the necessary ingredient is the gravitational pair production due to the curvature of spacetime itself. That is important since the curvature is not only exclusive to black holes. Neutron stars and white dwarfs also bend space and time strongly, and the calculations suggest that Hawking-like emission can, formally, be emitted by any sufficiently compact object. What is obtained is a universal, most exceedingly slow channel of “evaporation” which extends long beyond the esoteric horizon. In other words, the identification, but not the term black hole is the density, which becomes the important knob that dictates the speed.
This is changing the composition of what the universe consists of in its last chapter. Should the dense remnants progressively lose their mass to the curved particle production, the final significant challenge would be the evaporation of the most long-lived gravitational remains of the stars: white dwarfs. The upper-limit value of the Radboud group denotes that last fade at 1078 years, long before the previous estimates, which did not take into account this decay-pathway.
Another counterintuitive symmetry exists in the work. Neutron stars and stellar-mass black holes set down on virtually the same timescale of evaporation, roughly 1067 years, although black holes are the symbols of the extreme gravitational effect. This is because it is structural: But black holes do not have a surface, Wondrak said. Some of their own radiation gets reabsorbed thus preventing the process.
The logic was also stretched to whimsical extremes by the researchers, as they estimated that the Moon and even a human body would take about 1090 years to evaporate by this process numbers intended not so much to be practical estimates as to be stress tests of the behaviour of the equations in extremely different densities.
Put next to the rest of the “end-of-universe” concepts, the study makes a point that is hard to notice: cosmic endings are not one narrative. Unrelated to slow evaporation, quantum field theory enables a much more different form of ending a false vacuum decay in which the entire universe is bubbling into a lower-energy state. In 2025, a quantum annealer with 5,564 qubits was used to simulate some of those bubble interactions, making a set of equations notoriously intractable solvable so that they could be observed to run in a control device.
To the audience of Modern Engineering Marvels, the engineering lesson is plain, more and more, the progress in basic cosmology comes with the combination of the hybrid toolset of precision mathematics, quantum theory, and new computing equipment not to predict the end in human terms, but to put a limit on what physics can do. In that perspective, the ultimate darkness of the universe is not so much a date on a calendar as a limit that comes up because the curved spacetime is capable of producing particles, a particle, one infinitely small breach after another.
