Overview of The Big Bang Theory and Evidence of Universal Expansion

The video tutorial explores The Big Bang Theory, focusing on the redshift of light from galaxies moving away from Earth, which indicates the universe's expansion. It explains that the universe began from a dense, hot region and expanded rapidly 13.8 billion years ago. Over time, galaxies, stars, and planets formed as gravity brought matter together. The video presents evidence for this expansion, noting that more distant galaxies exhibit greater redshift, suggesting they move away faster than closer ones. This supports the idea that all matter is moving away from other matter, confirming the universe's expansion.

How did gravity contribute to the formation of galaxies, stars, and planets after the Big Bang?

What evidence supports the idea that more distant galaxies are moving away from Earth faster than closer galaxies?