The universe may end trillions of years sooner than we thought

Space Astronomy Cosmology The universe may end trillions of years sooner than we thought News By Paul Sutter published 28 April 2026 Recent surveys hint that the rate of cosmic expansion changes dramatically over time; if that's true, then the universe could end much sooner than we thought, new research suggests. When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. Astronomers use twinkling stars in galaxies like this one (NGC 5468) to confirm the universe’s expansion rate. But what if cosmic expansion were to slow down and reverse? New research looks at the implications on the lifespan of the universe. (Image credit: NASA, ESA, CSA, STScI, A. Riess (JHU/STScI), CC BY 4.0 INT) Copy link Facebook X Whatsapp Reddit Pinterest Flipboard Email Share this article 0 Join the conversation Follow us Add us as a preferred source on Google Newsletter Subscribe to our newsletter Scientists have long assumed our universe would continue on for trillions of years, but a new study presents a much shorter life span for the cosmos: Our universe might last only another 33 billion years.That's just a cosmic blink before everything collapses in on itself ‪—‬ a process dubbed the "Big Crunch," where expansion reverses, causing all matter and space-time to collapse back into an extremely dense state similar to the conditions of the Big Bang. While long considered a discarded possibility for the fate of the universe, because of accelerating cosmic expansion, this new research has reopened the surprising — and slightly unsettling — option.The journey to this dramatic conclusion started with our quest to map the cosmos, where we've focused on dark energy, the mysterious force that's pushing the universe apart at an accelerating rate. Recent data from the Dark Energy Survey (DES) and the Dark Energy Spectroscopic Instrument (DESI) mapped hundreds of millions of galaxies to probe this expansion. These crucial tools suggest, with extremely high confidence that the dark energy "equation of state" — its pressure-to-energy density relationship, which dictates its effect on expansion — isn't simply a static number. Instead, its influence appears to be changing over time. You may like 'Something's missing': Most thorough-ever study of the cosmos proves we still can't explain how the universe is expanding Our leading theory of dark matter may be wrong, huge new gravity study hints 'Collective hum' of black holes could settle the debate over new physics This strange dynamic opens the door for alternative explanations for what dark energy might be made of . This has led to the axion dark energy (aDE) model, which proposes that dark energy comprises both an axion field, which would be an ultra-light form of dark matter that sloshes around the universe, plus a cosmological constant, or fixed background expansion baked into the structure of space-time.In the new paper, which was uploaded to the preprint server arXiv, the researchers applied this hybrid model to DES measurements. They discovered that this combination likely can explain the DES and DESI results, but with a twist: In the far future of the universe, the interplay of the axion field and the cosmological constant actually actively pulls the universe back together, leading to that ultimate Big Crunch. The standard model of cosmology suggests that cosmic expansion will continue to accelerate over time. However, if dark energy is dynamic, as some recent surveys hint,…

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