[Answer] Which astronomer is credited with first proposing what became known as the Big Bang theory?

Step 1 : Introduction to the question "Which astronomer is credited with first proposing what became known as the Big Bang theory?"

...In 1927, Belgian priest and astronomer Georges Lemaître proposed that the universe began from a single, extremely dense and hot point, which he called the "primeval atom." His theory later became known as the Big Bang theory. Initially met with skepticism, it gained strong support after Edwin Hubble discovered that the universe is expanding. The 1965 discovery of the cosmic microwave background radiation provided further evidence, helping establish the Big Bang as the leading scientific explanation for the origin and evolution of the universe.

Step 2 : Answer to the question "Which astronomer is credited with first proposing what became known as the Big Bang theory?"

Georges Lemaître:

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