Compléter Lesson 1.8: Fill in the Blanks: The Origin of the UniverseVersion en ligne Test your knowledge about the Big Bang theory and cosmic phenomena! par Eric D Norman 1 expanding small expanded Big Bang longer closer cosmic microwave background origin hot cooled closer red shifts universe blue shifts Big Bang away shorter theory The is the leading explanation for the of the , suggesting that it began as an extremely and point approximately 13 . 8 billion years ago . As the universe , it , leading to the formation of subatomic particles and later simple atoms . The ( CMB ) radiation is a crucial piece of evidence supporting the Big Bang Theory ; it is leftover from the , filling the universe and providing a snapshot of the early universe . Suggesting that the early universe was together and hotter . Additionally , and observed in distant galaxies indicate that the universe is . Red shifts occur when objects move from us , causing their light to stretch into wavelengths , while blue shifts happen when objects move , compressing their light into wavelengths . Together , these phenomena help astronomers understand the dynamics of the universe and its evolution from a singularity to the vast cosmos we observe today .
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