The Size of the Universe at 1 Second After the Big Bang Explained

Discover how large the universe was just one second after the Big Bang, its temperature, and the fundamental particles present.

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At 1 second after the Big Bang, the universe was extremely hot and dense, around a temperature of 10 billion Kelvin. Its size was much smaller than its current expanse but had already expanded significantly from the initial singularity. Estimations place it at several light-years across at this nascent stage, filled with a mix of fundamental particles and energy.

FAQs & Answers

  1. What was the temperature of the universe at 1 second? It was around 10 billion Kelvin, indicating extreme heat and density during that time.
  2. How much had the universe expanded at 1 second after the Big Bang? It had expanded significantly from its initial singularity, being several light-years across.
  3. What particles existed in the universe at 1 second? The universe was filled with a mix of fundamental particles and energy at this nascent stage.
  4. Why is the study of the early universe important? Understanding the early universe helps scientists comprehend the origins of the cosmos and its evolution over billions of years.

Watch More

For more insights on the origins of the universe and its fascinating expansion, check out our detailed videos on the Big Bang theory and cosmic evolution.

  1. How the Big Bang Theory Explains the Evolution of Our Universe Discover how the Big Bang theory describes the universe's evolution over 13.8 billion years, leading to the stars and galaxies we see today.
  2. Understanding the Big Bang Theory: Key Concepts Explained Explore the main points of the Big Bang theory and how it explains the universe's origins.
  3. What is the Big Bang Theory? Understanding the Universe's Origins Explore the Big Bang theory that explains the universe's origins and evolution in a concise summary.
  4. What Was the Size of the Universe at 380,000 Years Old? Discover how small the universe was at 380,000 years old during the recombination era.