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Astronomy

Cosmic Background Radiation and the Big Bang

Quick fact

The cosmic microwave background was discovered accidentally in 1965 by Arno Penzias and Robert Wilson as a persistent noise in their radio antenna, earning them a Nobel Prize.

Why this is interesting

Imagine seeing the glow of the Big Bang itself – not with your eyes, but with a radio telescope. That faint hiss from every direction is the oldest light in the universe, and it holds the key to how everything began.