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Summarize the Big Bang theory and name two sources of evidence that support it.


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Please help! I cannot find an answer on any of the websites provided on my online school website.

Verified Answer :

The theory states that about 13.7 billion years ago all the matter in the Universe was concentrated into a single incredibly tiny point. This began to enlarge rapidly in a hot explosion, and it is still expanding today. Evidence for the Big Bang includes: all the galaxies are moving away from us.

Explanation:

Big Bang theory is the most widely approved theory of Universe creation. According to this theory the Universe is around 13.8 billion years old. Before that everything was concentrated in very high temperature and highly dense state. The universe expanded  (not exploded as commonly known) from this state. The two major evidence to support this theory:

1. The galaxies are moving away from us and each other. Also, the galaxies which are farther from us are moving at a faster rate than a galaxy nearby.

2. The discovery of Cosmic Microwave Background (CMB) radiation in 1964 further proved this theory correct. The presence of CMB could be proved only by Big Bang model and not by Steady State model of the universe.

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