The Last Scattering Surface represents the epoch in the universe's history when photons decoupled from matter, allowing light to travel freely through space. This event, occurring approximately 380,000 years after the Big Bang, provides a snapshot of the early universe, captured in the Cosmic Microwave Background radiation.

Last Scattering Surface

epoch in the universe's history

photons decoupled from matter

Light travel freely through space

Event occurring approximately 380,000 years after the Big Bang

snapshot of the early universe

Cosmic microwave background radiation is the thermal remnant from the Big Bang, providing a snapshot of the universe when it was just 380,000 years old. It is a nearly uniform background of microwave radiation that fills the universe and is a critical piece of evidence for the Big Bang theory, offering insights into the early conditions and subsequent evolution of the cosmos.

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