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What does the Big Bang Theory propose?
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The Big Bang Theory proposes that the universe began as a singularity approximately 13.8 billion years ago and has been expanding ever since.
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Who first proposed the concept of an expanding universe?
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Georges Lemaître first proposed the concept of an expanding universe in 1927.
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Which discovery by Edwin Hubble supported the Big Bang Theory?
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Edwin Hubble's observation of redshift in distant galaxies, indicating that they are moving away from us, supported the Big Bang Theory.
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What does cosmic microwave background radiation mean in the context of the Big Bang Theory?
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Cosmic microwave background radiation is the thermal remnant radiation from the Big Bang, acting as strong evidence for the theory.
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How does the Big Bang Theory explain the abundance of light elements?
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The Big Bang Theory explains that in the first few minutes after the Big Bang, conditions allowed for nuclear reactions that formed light elements like hydrogen, helium, and lithium.
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What role did Arno Penzias and Robert Wilson play in the Big Bang Theory?
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Arno Penzias and Robert Wilson discovered the cosmic microwave background radiation, which provided strong evidence for the Big Bang Theory.
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Which theory challenged the Big Bang Theory before it gained wider acceptance?
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The Steady State Theory challenged the Big Bang Theory before the cosmic microwave background radiation was discovered.
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What is Hubble's Law?
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Hubble's Law states that the farther away a galaxy is, the faster it is moving away, supporting the notion of an expanding universe.
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Why is the Big Bang Theory considered a cosmological model?
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The Big Bang Theory is considered a cosmological model because it aims to explain the origin and evolution of the universe.
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What is singularity in the context of the Big Bang Theory?
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A singularity refers to an infinitely small, dense point where the laws of physics as we know them break down, representing the state of the universe at its beginning.
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How do scientists estimate the age of the universe according to the Big Bang Theory?
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Scientists estimate the age of the universe by measuring the rate of its expansion (Hubble's Constant) and extrapolating back to the start of the Big Bang.
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How has the COBE satellite contributed to Big Bang research?
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The Cosmic Background Explorer (COBE) satellite measured the cosmic microwave background radiation, providing detailed data that confirmed predictions of the Big Bang Theory.
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What recent observations have refined the Big Bang Theory?
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Observations from the WMAP and Planck spacecrafts have provided precise measurements of the cosmic microwave background radiation, helping to refine parameters of the Big Bang Theory.
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Why was the Big Bang Theory initially controversial?
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The Big Bang Theory was initially controversial due to its implication of a universe with a beginning, contrasting with the then-dominant belief in a static universe.
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Which cosmic phenomenon does the Big Bang Theory not explain?
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The Big Bang Theory does not explain what caused the initial singularity or what preceded it.
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