Where did big bang occur
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Where Did the Big Bang Occur?
Understanding the Big Bang Theory
The Big Bang theory posits that the universe originated from an extremely hot and dense state approximately 13.8 billion years ago. This event marks the beginning of the expansion of the universe, leading to the formation of all matter and radiation we observe today. The theory is supported by several lines of evidence, including the cosmic microwave background (CMB) radiation and the abundance of light elements formed during primordial nucleosynthesis1.
The Concept of Location in the Big Bang
A common misconception about the Big Bang is that it occurred at a specific point in space. However, the Big Bang did not happen at a particular location; rather, it happened everywhere in the universe simultaneously. At the moment of the Big Bang, the universe was in a state of singularity, where all points in space were condensed into an infinitely small and dense point. As the universe began to expand, every point in space started moving away from every other point, leading to the large-scale structure we observe today1.
The Dark Big Bang Hypothesis
Recent research introduces the concept of a "Dark Big Bang," which suggests that dark matter and possibly dark radiation could have formed in a separate event after the initial Big Bang. This scenario involves a phase transition in the dark sector, transforming dark vacuum energy into a hot dark plasma of particles. This event, termed the Dark Big Bang, could have occurred when the universe was less than a month old, corresponding to a temperature in the visible sector above a few keV1.
The Dark Big Bang hypothesis provides a framework for understanding the formation of dark matter, which evades direct and indirect detection but could be inferred from gravitational wave signatures and small-scale structure observations1.
Alternative Theories: The Plasma Universe
Contrary to the Big Bang theory, some researchers propose alternative models, such as the plasma universe theory. This theory suggests that the cosmos is too vast to have originated from a single explosion. Instead, it posits that the universe is a plasma universe, growing slowly in giant strands that twist across space. This model connects the smallest particles of matter to an infinite array of cosmic systems, challenging the notion of a singular origin event2.
Conclusion
The Big Bang theory remains the predominant explanation for the origin of the universe, describing an event that occurred everywhere in space simultaneously. However, alternative theories like the plasma universe and new hypotheses such as the Dark Big Bang continue to provide intriguing perspectives and challenge our understanding of cosmic origins. As our observational capabilities improve, these theories will be further tested, potentially reshaping our comprehension of the universe's beginnings.
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Dark matter and gravitational waves from a dark big bang
The Dark Big Bang scenario, which creates dark matter and potentially dark radiation, is consistent with structure formation and the CMB constraints, and may lead to striking gravity wave signatures.
THE BIG BANG NEVER HAPPENED
The big bang theory is challenged by a plasma universe, which is too large to have been created from a single explosion 20 billion years ago, and instead grows slowly in giant strands connecting the smallest particles of matter to an infinity of different cosmic systems.
Highly CitedNaming the Big Bang
The name Big Bang has a richer and more surprising history than commonly assumed, and its etymological approach provides insights into the historical understanding of the emergence of modern cosmology.
Theism, Atheism, and Big Bang Cosmology.
The Big Bang cosmology supports either theism or atheism, with William Lane Craig arguing for the Big Bang being created by God and Quentin Smith arguing against it.
Highly CitedQuantum nature of the big bang.
The big bang is replaced by a big bounce in homogeneous isotropic models with a scalar field, allowing for a detailed realization of the "emergent time" idea and ensuring deterministic quantum evolution across the deep Planck regime.
Highly CitedThe origin of the Big-Bang
The Big-Bang may have been caused by a collapsed universe acting as an ultra-high energy particle accelerator, with super-symmetry breaking down and the universe expanding.
Laser interferometry for the Big Bang Observer
The Big Bang Observer's laser interferometry between three spacecraft can potentially detect gravitational waves from the early universe.
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