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About 13.8 billion years ago
- About 13.8 billion years ago, the Big Bang gave rise to everything, everywhere, and everywhen—the entire known Universe.
www.cfa.harvard.edu/big-questions/what-happened-early-universe
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In this stage, the characteristic scale length of the universe was the Planck length, 1.6×10−35m, and consequently had a temperature of approximately 10 32 degrees Celsius. Even the very concept of a particle breaks down in these conditions.
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?
Oct 11, 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 scientists think that everything that we know and experience around us began at a moment known as the Big Bang, 14 billion years ago. But how can we have any clue about something...
Jul 1, 2019 · Virtually all astronomers and cosmologists agree the universe began with a “big bang” — a tremendously powerful genesis of space-time that sent matter and energy reeling outward.
Feb 2, 2022 · The history of the universe and how it evolved is broadly accepted as the Big Bang model, which states that the universe began as an incredibly hot, dense point roughly 13.7 billion years...
The chronology of the universe describes the history and future of the universe according to Big Bang cosmology. Research published in 2015 estimates the earliest stages of the universe's existence as taking place 13.8 billion years ago, with an uncertainty of around 21 million years at the 68% confidence level. [1]