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  1. Big Bang - Wikipedia

  2. What is the Big Bang Theory? | Space

    2023年7月26日 · The Big Bang Theory explains how the universe began with an infinitely hot and dense single point that inflated to form the ever-expanding cosmos we see today.

  3. The Big Bang - NASA Science

    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.

  4. The history of the universe: Big Bang to now in 10 easy steps

  5. What happened in the early universe? | Center for Astrophysics ...

  6. The science behind the Big Bang theory | Astronomy.com

    2023年12月18日 · Evidence of the Big Bang theory and what happened immediately after the expansion. By Astronomy Staff | Published: December 18, 2023 | Last updated on December 20, 2023. An end-on view of one...

  7. The big bang - Institute of Physics

    Most physicists believe the universe was born in a big bang 13.8 billion years ago. In it, the energy making up everything in the cosmos we see today was squeezed inside an inconceivably small space – far tinier than a grain of sand, …

  8. WMAP Big Bang Concepts - NASA

    2014年1月24日 · The Big Bang model of cosmology rests on two key ideas that date back to the early 20th century: General Relativity and the Cosmological Principle. By assuming that the matter in the universe is distributed uniformly …

  9. WMAP Big Bang Theory - NASA

    2012年3月1日 · The Big Bang Model is a broadly accepted theory for the origin and evolution of our universe. It postulates that 12 to 14 billion years ago, the portion of the universe we can see today was only a few millimeters across.