Where Did the Big Bang Happen?

The video explains the Big Bang theory, emphasizing that the universe's expansion started everywhere, not from a single point. It discusses the evidence supporting this theory, such as the cosmic microwave background radiation, which shows isotropy and homogeneity. The video also uses the analogy of an expanding balloon to illustrate the universe's expansion and highlights the limitations of our observations due to the finite speed of light and our position in the universe.

How does the analogy of an expanding balloon help explain the concept of the expanding universe?

What limitations do we face in confirming the isotropy and homogeneity of the universe beyond our observable limits?