A recent model in cosmology merges two fascinating concepts—cyclic universes and primordial black holes—to tackle the mystery of dark matter. This invisible substance constitutes about 85% of all matter in the universe.
Understanding the Cosmic Bounce
Most people are familiar with the Big Bang theory. But there’s an alternative perspective: a “cosmic bounce.” Here, the universe expands, contracts, and then expands again in a continuous loop. Each universe builds upon the remnants of the last, rather than existing side by side like in the Marvel multiverse.
Research led by Enrique Gaztanaga, a professor at the Institute of Space Sciences in Barcelona, suggests that structures larger than 90 meters could survive the universe’s collapse and carry on into the next cycle. These “relics” could help explain both dark matter and the large structures we observe in the early universe.
Traditionally, dark matter has been thought to consist of unknown particles. But after years without evidence for these particles, scientists are starting to consider that dark matter might actually be made up of numerous small black holes formed during the universe’s inception.
Black Holes from the Start?
The challenge with this idea is that for these black holes to account for dark matter, they would need to exist from the very beginning, long before stars formed. Gaztanaga’s model suggests a solution: if compact structures can endure cosmic collapses, our universe might have been born with existing black holes. This eliminates the need for complex formations to create them later.
If this theory holds, it could unravel two mysteries: where black holes come from and what dark matter truly is. Instead of being an enigma, dark matter could be remnants from a universe that existed before our own.
Gaztanaga points out that while the concepts are promising, further research is essential. He stated, “We need to test these ideas against data—from gravitational-wave backgrounds to galaxy surveys.”
The Bigger Picture
This paradigm shift offers a fresh lens on the universe, suggesting it may not have begun with a singular event but as part of an ongoing cycle. As scientists continue to explore these ideas, we may uncover more about the universe’s intricate design.
For further information on the implications of these studies, you can check out this article from The Conversation.
Source link
space,cosmology,universe,dark matter,black holes
