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Big Bang theory explains:
1. origin of Universe
2. origin of Stars
3. origin of Galaxies
4. origin of Solar System

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Correct Answer - Option 1 : origin of Universe

The correct answer is origin of Universe.

  • The most widely accepted theory about the origin of the universe is the Big Bang Theory.
    • Expanding universe hypothesis. is another name for Big Bang Theory.
    • George Lamaitre coined the term "Big Bang Theory."
    • According to the Big Bang Theory, the universe began as a small hot body that exploded massively and then swiftly expanded.
    • The universe cooled as a result of its fast expansion, bringing it to its current state.
    • The temperature plummeted to 4,500K within 300,000 years after the Big Bang, allowing atomic matter to form.
    • Around 13,75 billion years ago, the big bang happened.
    • Edwin Hubble in 1920 provided evidence that the universe is expanding.

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