A bold question now dominates cosmology: could the universe end far sooner than we once thought? New physics points to a far shorter lifespan, backed by detailed calculations that redefine the final fate of everything. In short, the ultimate curtain call may arrive long before the trillion-trillion-trillion-year horizon we once assumed—and it could hinge on a twist of Hawking’s idea beyond black holes alone.
For many years, physicists estimated the cosmos would gradually fade away over an incomprehensibly long timescale, on the order of 10¹¹⁰⁰ years. Now, researchers from Radboud University in the Netherlands present a provocative revision: the end could come after roughly 10⁷⁸ years, a number spoken of as one quinvigintillion years (a 1 followed by 78 zeros). This new timeline arises from revisiting Hawking radiation, a concept Stephen Hawking introduced in 1975. He proposed that black holes lose mass as particle pairs form near their edges, with one particle falling in and the other escaping, allowing the black hole to gradually evaporate. Earlier thinking confined this mechanism to black holes, but the latest work broadens the scope dramatically.
Building on research published in Physical Review Letters in 2023 and extended in a recent study accepted by the Journal of Cosmology and Astroparticle Physics, Heino Falcke, Michael Wondrak, and Walter van Suijlekom argue that a Hawking-like evaporation process applies to all compact, massive objects—white dwarfs and neutron stars included. White dwarfs are dense, Earth-sized remnants left when Sun-like stars exhaust their fuel, while neutron stars are ultra-dense cores formed after certain supernovae. These stellar remnants, though vastly long-lived, would also gradually evaporate through radiation that depends primarily on their density. The key claim is that strong spacetime curvature around massive bodies enables evaporation for any object that generates a gravitational field—no matter how small its event horizon may be.
If correct, this means the universe’s final phases would be governed not by the fate of massive black holes alone but by the slow dissolution of the last white dwarfs and neutron stars. According to the Radboud team, those remnants would vanish on a timescale of about 10⁷⁸ years. “So the ultimate end of the universe ends up much sooner than we previously thought, yet it still takes an inconceivably long time,” co-author Falcke noted. The researchers emphasize that this reframes Hawking’s insight: the evaporation mechanism could operate wherever gravity compresses space enough, with the rate tied to density—less dense objects fade far more slowly, while denser ones fade faster.
Applying this rule to the universe’s final population of compact objects yields a new upper bound on the cosmos’s lifespan. When white dwarfs and neutron stars are included, the cosmic clock runs out far sooner than the earlier 10¹¹⁰⁰-year estimate. Of course, this timescale remains so vast that it dwarfs anything imaginable in human experience or even galactic history. Co-author van Suijlekom highlights the interdisciplinary nature of the work, merging astrophysics, mathematics, and quantum physics to probe Hawking radiation from new angles and, perhaps, to challenge our understanding of the fundamental mechanism.
Importantly, this revised timeline does not alter present-day life or humanity’s near future. It belongs to the realm of deep-time cosmology, where timelines stretch beyond everyday comprehension. What changes is the theoretical narrative: Hawking radiation could play a far more decisive role in the universe’s distant destiny than previously assumed, extending beyond indirect implications to a potentially wider class of objects undergoing slow evaporation. The study does not imply the universe is dying faster in any observable sense. Instead, it tightens the global picture by tying the end to the fade-out of the last neutron stars and white dwarfs.
The idea is stark, almost philosophical: once those final stellar remnants vanish through this Hawking-like process, luminous matter would disappear entirely. According to the Radboud team, that moment occurs not at 10¹¹⁰⁰ years but at 10⁷⁸ years, a horizon so distant that it largely remains in the language and imagination of cosmology rather than everyday science.
