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13.787±0.020 billion years ago
- Detailed measurements of the expansion rate of the universe place the Big Bang singularity at an estimated 13.787±0.020 billion years ago, which is considered the age of the universe.
en.wikipedia.org/wiki/Big_Bang
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XDF image shows fully mature galaxies in the foreground plane – nearly mature galaxies from 5 to 9 billion years ago – protogalaxies, blazing with young stars, beyond 9 billion years. The Big Bang models developed from observations of the structure of the universe and from theoretical considerations.
- 1 min
- Denise Chow,Scott Dutfield
- 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.
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.
Oct 5, 2023 · “The Big Bang is a scientific theory describing the sudden growth of our observable universe approximately 13.79 billion years ago (according to the best fit of recent parameters) when...
Sep 17, 2024 · What Is the Big Bang? 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!
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, or even an atom.
Dec 17, 2015 · In short, the Big Bang hypothesis states that all of the current and past matter in the Universe came into existence at the same time, roughly 13.8 billion years ago. At this time, all...
