Main Evidence for the Big Bang

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Presentation transcript:

Main Evidence for the Big Bang The Hubble Law The existence and properties of the blackbody cosmic microwave background Primordial nucleosynthesis and the observed light element abundances

Modern-Day Hubble Law

Too Much Helium Our Sun is about 28% helium by mass.

Nuclear Reactions in the Early Universe

Primordial Nucleosynthesis

“Cooling” of the Cosmic Microwave Background

Arno Penzias and Robert Wilson

Cosmic Background Explorer (COBE)

Spectrum of the Cosmic Microwave Background

Anisotropy of the Cosmic Microwave Background

Current Maps of the Cosmic Microwave Background WMAP

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