CMB (Cosmic Microwave Background)

The Cosmic Microwave Background (CMB) is the faint glow of radiation filling the universe, emitted approximately 380,000 years after the Big Bang. It represents the earliest light we can observe, providing a snapshot of the universe when it was young and hot. As the universe expanded and cooled, this radiation stretched into microwave wavelengths. Studying the CMB helps scientists understand the universe’s origins, composition, and evolution by analyzing tiny temperature variations that reveal how matter and energy were distributed in its early stages.