Photon decoupling refers to the epoch in the early universe when photons ceased interacting frequently with matter, allowing the universe to become transparent to radiation. This event marks the release of the cosmic microwave background radiation, providing a snapshot of the universe approximately 380,000 years after the Big Bang.

Photon Decoupling

Photon decoupling

The early universe refers to the period immediately following the Big Bang, characterized by rapid expansion and cooling that led to the formation of fundamental particles and eventually atoms. This era set the stage for the development of cosmic structures such as galaxies, stars, and planets through processes governed by fundamental forces and cosmic inflation.

early universe

photons ceased interacting

Universe transparent to radiation

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.

cosmic microwave background radiation

snapshot of the universe

The Big Bang theory is the prevailing cosmological model explaining the observable universe's origin from an extremely hot and dense singularity approximately 13.8 billion years ago. It describes the universe's expansion and the formation of fundamental particles, leading to the development of galaxies, stars, and planets over time.

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