Big Bang Theory

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What is the Big Bang Theory?
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A scientific explanation of how the universe expanded from an extremely hot and dense state.
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Approximately how long ago did the Big Bang occur?
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About 13.8 billion years ago.
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What did the Big Bang create?
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Space, time, matter, and energy.
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What evidence supports the Big Bang Theory?
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The cosmic microwave background radiation and the expansion of the universe.
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Who was one of the first scientists to propose the Big Bang Theory?
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Georges Lemaître.
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What is cosmic microwave background radiation?
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It is the thermal radiation left over from the time of recombination in Big Bang cosmology.
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What does the redshift of galaxies imply about the universe?
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That the universe is expanding.
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What is singularity in the context of the Big Bang?
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A point in time where the universe is thought to be infinitely dense and infinitely hot.
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What is the significance of Hubble's Law to the Big Bang Theory?
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It supports the theory with the observation that galaxies are moving away from us.
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What is nucleosynthesis in Big Bang Theory?
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The process of formation of new atomic nuclei from pre-existing nucleons (such as protons and neutrons).
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What elements were formed in the first few minutes of the Big Bang?
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Hydrogen, helium, and traces of lithium.
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What is inflation in the context of the Big Bang?
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A rapid expansion of the universe that happened just after the Big Bang.
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How does the Big Bang Theory explain the uniformity of the universe?
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Inflation theory suggests rapid expansion smoothed out irregularities.
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What is a possible fate of the universe as per the Big Bang Theory?
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Possibilities include continuous expansion, collapse back into a singular state, or reaching a stable size.
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How does the Big Bang Theory differ from the Steady State Theory?
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Unlike the Steady State Theory, the Big Bang Theory suggests the universe had a definite beginning.
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