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  1. Jul 26, 2023 · The Big Bang Theory explains how the universe began 13.7 billion years ago. (Image credit: RomoloTavani via Getty Images)

  2. 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. Learn more about the big-bang model in this article.

  3. The Big Bang Theory is a scientific definition of the origin of the universe that is widely accepted. This theory says that our universe began as a singularity.A point of extremely high temperature and infinite density and has been expanding ever since.

  4. Jun 11, 2019 · The big-bang theory is the dominant theory of the origin of the universe. In essence, this theory states that the universe began from an initial point or singularity, which has expanded over billions of years to form the universe as we now know it.

  5. en.wikipedia.org › wiki › Big_BangBig Bang - Wikipedia

    The Big Bang is a physical theory that describes how the universe expanded from an initial state of high density and temperature. 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". Various cosmological models of the Big Bang explain the evolution of the observable universe ...

  6. For centuries, humans have gazed at the stars and wondered how the universe developed into what it is today. It's been the subject of religious, philosophical, and scientific discussion and debate. People who have tried to uncover the mysteries of the universe's development include such famous scientists as Albert Einstein, Edwin Hubble and Stephen Hawking.

  7. Jul 9, 2024 · 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!

  8. Our knowledge of the events and forces that shaped the early Universe is dependent on our ability to understand the most extreme conditions. On one hand, the Universe’s origin was incomprehensibly small, on dimensions much tinier than the smallest known subatomic particles, and it was completely transformed over an immeasurably brief period, much shorter than any observable time scale. On ...

  9. Jun 12, 2019 · The classic Big Bang theory. For most of human history, observers of the sky assumed it eternal and unchanging. Edwin Hubble dealt this story an experimental blow in the 1920s when his ...

  10. Dec 17, 2015 · The Big Bang Theory explains how the Universe has evolved over last 13.8 billion years, starting from a singularity to its current size.

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