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#137 – Alex Filippenko: Supernovae, Dark Energy, Aliens & the Expanding Universe
Lex Fridman Podcast
The Expansion of the Universe
The radius of the observable universe is 45.7 billion light years. And the age of the universe is 13.7 billion years. But while it's been traveling that distance, the parts that it already traveled continue to expand. The space itself between galaxies or more correctly clusters of galaxies expanding.
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