Day 356 of 365
December 22
S
Space Cosmic Microwave Background
The Cosmic Microwave Background (CMB) is light from 380,000 years after the Big Bang - the oldest observable thing. Its tiny temperature variations show matter density that seeded galaxy formation. The CMB confirms Big Bang cosmology and reveals the universe's age and composition.
Did you know?
About 1% of TV static is caused by the Cosmic Microwave Background!
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