Cosmic microwave background radiation discovered

The astronomers Arno Penzias and Robert Wilson discovered the cosmic microwave background (CMB) radiation by chance in the mid-1960s while using the Holmdel Horn Antenna in New Jersey to map the sky. The CMB was later mapped with satellites, including the WMAP probe.

19 August 2010

6 minutes

This clip is from

Horizon—2007-2008, The Six Billion Dollar Experiment

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