COSMIC MICROWAVE BACKGROUND Meaning and
Definition
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The cosmic microwave background (CMB) refers to a faint, uniform, and pervasive radiation that permeates all parts of the observable universe. It is often regarded as the remnant energy from the Big Bang, the event that marked the beginning of our universe approximately 13.8 billion years ago. The CMB consists of electromagnetic radiation, specifically microwaves, and derives its name from being spread across the entire cosmos.
The origins of the CMB can be traced back to a critical moment in the early universe called recombination, which occurred roughly 380,000 years after the Big Bang. Prior to recombination, the universe was a seething plasma of particles and radiation that were too energetic to combine and form atoms. However, as the universe expanded and cooled down, photons and electrons had the opportunity to combine to form stable hydrogen atoms. This process radically altered the behavior of the radiation, allowing it to travel freely across the cosmos.
Today, the CMB constitutes the most ancient light that can be detected by scientific instruments. Its presence provides valuable insight into the early universe, aiding astronomers in understanding the formation and evolution of cosmic structures. The CMB radiation is highly uniform, but tiny temperature fluctuations exist across the sky, representing slight density variations. Modern experiments, such as those conducted by satellite missions like the Planck spacecraft, have enabled precise measurements of these fluctuations, supporting various cosmological models and theories.
Common Misspellings for COSMIC MICROWAVE BACKGROUND
- xosmic microwave background
- vosmic microwave background
- fosmic microwave background
- dosmic microwave background
- cismic microwave background
- cksmic microwave background
- clsmic microwave background
- cpsmic microwave background
- c0smic microwave background
- c9smic microwave background
- coamic microwave background
- cozmic microwave background
- coxmic microwave background
- codmic microwave background
- coemic microwave background
- cowmic microwave background
- cosnic microwave background
- coskic microwave background
- cosjic microwave background
- cosmuc microwave background
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