How does the expanding universe hypothesis prove the occurrence of the big bang
Answer (1)
Scientists believe the Big Bang happened because of strong evidence from the expanding universe. They discovered that galaxies are moving away from each other, which means to say that the universe is continuously growing. If we reverse time, all the matter must have once been packed into a tiny, hot point. This point suddenly expanded — a moment we now call the Big Bang. Proof includes the redshift of light from galaxies, which shows that they’re moving apart or expanding, along with the cosmic microwave background, a faint glow left over from the early universe. Scientists also found that the amounts of hydrogen and helium in space align with predictions of the Big Bang theory. These discoveries strongly support that the universe began from a massive expansion long ago.references. https://science.nasa.gov/mission/hubble/science/science-behind-the-discoveries/hubble-cosmological-redshift/https://www.esa.int/Science_Exploration/Space_Science/Cosmic_Microwave_Background_CMB_radiation#:~:text=Evidence%20for%20the%20Big%20Bang,precise%20source%20in%20the%20sky.https://www.energy.gov/science/doe-explainsnucleosynthesishttps://science.nasa.gov/mission/hubble/science/science-highlights/mapping-the-cosmic-web/
