The discovery of the cosmic microwave background was important because:

Question

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The discovery of the cosmic microwave background provided experimental verification of a prediction from the Big Bang theory, supporting the idea that the universe began as a hot, dense state and has been expanding and cooling ever since. The discovery of the cosmic microwave background provided strong experimental evidence in support of the Big Bang theory, which had predicted the existence of the cosmic microwave background radiation. This discovery was a major milestone in the development of modern cosmology.

The Discovery of the Cosmic Microwave Background Was Important Because