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- Over the last century or so, science has homed in on an answer: the Big Bang. This describes how the Universe was born in a cataclysmic explosion almost 14 billion years ago. In a tiny fraction of a second, the observable universe grew by the equivalent of a bacterium expanding to the size of the Milky Way.
physics.mit.edu/news/it-all-started-with-a-big-bang-the-quest-to-unravel-the-mystery-behind-the-birth-of-the-universe/It all started with a Big Bang – the quest to unravel the ...
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Oct 13, 2021 · Surprise: the Big Bang isn’t the beginning of the universe anymore. We used to think the Big Bang meant the universe began from a singularity. Nearly 100 years later, we’re not so sure. Our...
- Ethan Siegel
2 days ago · How did everything begin? It’s a question that humans have pondered for thousands of years. Over the last century or so, science has homed in on an answer: the Big Bang. This describes how the Universe was born in a cataclysmic explosion almost 14 billion years ago.
The Big Bang explains the evolution of the universe from a starting density and temperature that is well beyond humanity's capability to replicate, so extrapolations to the most extreme conditions and earliest times are necessarily more speculative.
About 13.8 billion years ago, the Big Bang gave rise to everything, everywhere, and everywhen—the entire known Universe. What caused the Big Bang? What happened that first moment at the beginning of the Big Bang? When did the first stars form?
- How it all started. The Big Bang was not an explosion in space, as the theory's name might suggest. Instead, it was the appearance of space everywhere in the universe, researchers have said.
- The universe's first growth spurt. When the universe was very young — something like a hundredth of a billionth of a trillionth of a trillionth of a second (whew!)
- Too hot to shine. Light chemical elements were created within the first three minutes of the universe's formation. As the universe expanded, temperatures cooled and protons and neutrons collided to make deuterium, which is an isotope of hydrogen.
- Let there be light. About 380,000 years after the Big Bang, matter cooled enough for electrons to combine with nuclei to form neutral atoms. This phase is known as "recombination," and the absorption of free electrons caused the universe to become transparent.
1 day ago · It’s a question that humans have pondered for thousands of years. Over the last century or so, science has homed in on an answer: the Big Bang. This describes how the Universe was born in a ...
Aug 16, 2024 · How did the universe begin—and what were its early days like? The most popular theory of our universe's origin centers on a cosmic cataclysm unmatched in all of history—the big bang.
