Why was the discovery of cosmic background radiation important?

Answer 1

Cosmic background radiation is the weak radiation left over and still spreading from the Big Bang. It helped us see how the universe was in moments after it was born.

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Answer 2

Ivy Allen

The Big Bang theory—which holds that the universe began as a hot, dense state and has been expanding ever since—was strongly supported by the discovery of cosmic background radiation, which also helped scientists understand the early stages of the universe's evolution and provided important insights into its composition and structure.

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.