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Jun 18, 2024 · Big-bang model, widely held theory of the evolution of the universe. Its essential feature is the emergence of the universe from a state of extremely high temperature and density—the so-called big bang that occurred 13.8 billion years ago.
- Planck Time
In cosmology: Superunification and the Planck era. This...
- Expanding Universe
Expanding universe, dynamic state of the extragalactic...
- Planck Time
Jul 26, 2023 · The Big Bang Theory is the leading explanation for how the universe began.
The Big Bang is a physical theory that describes how the universe expanded from an initial state of high density and temperature. [1] . It was first proposed as a physical theory in 1931 by Roman Catholic priest and physicist Georges Lemaître when he suggested the universe emerged from a "primeval atom".
Overview. The origin, evolution, and nature of the universe have fascinated and confounded humankind for centuries. New ideas and major discoveries made during the 20th century transformed cosmology – the term for the way we conceptualize and study the universe – although much remains unknown. Learn more.
Jul 9, 2024 · The Short Answer: The big bang is how astronomers explain the way the universe began. It is the idea that the universe began as just a single point, then expanded and stretched to grow as large as it is right now—and it is still stretching!
Jun 12, 2019 · The Big Bang theory describes how the universe began based on what cosmologists know about the sliver of existence visible today.
Jan 18, 2017 · The most popular theory of our universe's origin centers on a cosmic cataclysm unmatched in all of history—the big bang. Learn about the big bang theory and how our universe got started....
