The Big Bang Theory is a theory that describes the origin of the Universe. This theory was first proposed by the Belgian cosmologist G. Lemaitre in 1931.
- The evidence of universe expansion that supports the Big Bang Theory is the observation that the temperature of the universe is decreasing.
- According to this theory, the Universe is continuously expanding as it becomes cooler.
The most important lines of evidence that support the Big Bang Theory include:
- The observed expansion of the space in the Universe.
- The discovery of the cosmic microwave background radiation (CMB) is believed to be leftover radiation from the Big Bang.
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