New Prediction: The Universe Will End Sooner Than Expected
Scientists have made a groundbreaking prediction about the end of the universe, suggesting it will occur trillions of years earlier than previously thought. This new theory challenges long-held assumptions about the fate of our cosmos.
Until now, it was widely believed that the universe would gradually fade into a “heat death” over trillions of years. However, researchers from the Donostia International Physics Center have proposed a different scenario. According to their simulations, the entire universe will reach its end precisely 33.3 billion years after the Big Bang. Given that the universe is currently 13.8 billion years old, this means we have less than 20 billion years left before the final event.
This dramatic end is known as the “Big Crunch.” In this scenario, the universe’s expansion will reverse, causing galaxies, stars, and planets to collapse back into a single point. As this happens, Earth and all other matter in existence will be violently crushed and absorbed by black holes.
The research team published their findings in a pre-print paper, stating, “Eventually, it is plausible that the universe ends in giant black holes.”
Two Possible Fates of the Universe
Scientists generally believe there are two ways the universe might end—either it continues expanding until it becomes a frozen void or it collapses in a fiery crunch. Which of these outcomes occurs depends largely on the strength of dark energy, a mysterious force driving the universe apart.
For a long time, astronomers thought dark energy was a constant, ensuring the universe’s expansion would keep accelerating. However, recent measurements from the Dark Energy Survey Instrument (DESI) suggest otherwise. This massive map of 47 million galaxies revealed that dark energy is not a constant but changes over time.
If true, this could mean the universe’s expansion might slow down and even reverse, pulling matter back together like a rewind of the Big Bang.
How Does the Universe Expand?
Observations from the Hubble Space Telescope show that the universe is expanding at an accelerating rate. However, this does not mean the universe is expanding into anything or that galaxies like the Milky Way are getting bigger.
Imagine the universe as dots on the surface of a balloon. As you blow air into the balloon, the surface stretches, and the dots move apart. Similarly, the cosmos expands by stretching the fabric of spacetime itself while planets and galaxies remain the same size.
This means the universe isn’t expanding into empty space but creating more space by stretching. Researchers applied a model called the axion dark energy (aDE) model to data from the DESI survey. They found that this model can explain everything scientists have observed about the universe. However, they also discovered that this form of dark energy inevitably leads to the Big Crunch.
Once the universe expands beyond a certain size, the interaction between the axion field and the cosmological constant pulls the universe back together. This reverse expansion will continue until the entire universe is crushed back into a single point of matter known as a singularity.
Implications for the Future
As the universe begins to contract, the researchers say that matter will be “squeezed together.” Lead author Dr. Hoang Nhan Luu and his co-authors note that this will “enhance the formation of black holes, in particular the merging of black holes.” They add, “As the universe is collapsing, one can imagine that matters are pushed together to form a giant black hole, which in turn shields/hides the crunch singularity.”
On a more positive note, the researchers suggest that this future may not significantly impact any future inhabitants of Earth. Dr. Luu writes, “On the local level, the possible collision of our Milky Way with its largest neighbour, the Andromeda galaxy, is predicted to occur in about four to 10 billion years. It is interesting to re-estimate the time of their collision (or no collision) before the big crunch.”
However, as Dr. Luu and his co-authors admit, the future of our universe remains uncertain. The observations from DESI’s latest survey are still being analyzed, and scientists need more time to verify the data. The first papers on DESI’s observations are expected next year, which should help confirm whether dark energy is truly changing.
Similarly, scientists will need more data to determine if the aDE model is accurate. Dr. Luu concludes, “More and better data are expected in the near future and the aDE model will be rigorously tested. If confirmed, the aDE model parameters – and the universe’s lifespan – will be more precisely determined.”
