How Big Is the Universe?

The video explores the vastness of the universe, emphasizing our limited understanding of its size due to the time it takes for light to travel. It explains how the observable universe is defined by the light that has reached us since the Big Bang, and how the universe's expansion affects our perception of its size. The video also touches on the concept of the universe being potentially infinite and the idea of multiple universes. Despite our advancements, much of the universe remains beyond our reach due to its rapid expansion.

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