Chapter 1: Problem 8
What is the Big Bang, and when do astronomers conclude it occured? (C)
Short Answer
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The Big Bang is a widely accepted theory explaining the origin and evolution of the universe from an incredibly hot, dense point around 13.8 billion years ago. The universe has been expanding ever since, forming galaxies, stars, and planets. Astronomers concluded this age based on observations of the universe's expansion, such as Hubble's Law, and data collected by space missions studying the cosmic microwave background radiation.
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