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Chapter 1: The Cosmos & Our Place in It
The Big Bang: How the Universe Began
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6 minute lessonCosmologyFoundations
A sanitized local fixture introducing the expansion of the early universe.
Video by Local fixture channel
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Summary
The Big Bang describes space expanding from a hot, dense early state.
Space expanded everywhere.
The early universe was hot and dense.
Evidence supports the model.
Why it matters
It provides the foundation for the rest of the astronomy path.