Deuterium Abundance
Deuterium Abundance
Transcript: The problem with using helium 3, helium 4, or lithium 7 for testing cosmic nucleosynthesis in the big bang m... Read more
28 Jul 2011
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1min
Helium Abundance
Helium Abundance
Transcript: The best traditional test of cosmic nucleosynthesis and the predictions of the big bang model is the helium ... Read more
28 Jul 2011
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1min
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Light Element Abundance
Light Element Abundance
Transcript: In the big bang model it’s possible to calculate the abundance of light elements created by fusion reactions... Read more
28 Jul 2011
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1min
Cosmic Nucleosynthesis
Cosmic Nucleosynthesis
Transcript: The cosmic abundance of light elements is a primary piece of evidence in favor of the big bang model. Stars... Read more
28 Jul 2011
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Dark Energy
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Transcript: What is the physical meaning of the cosmological constant? Astronomers do not know and physicists are puzzl... Read more
28 Jul 2011
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Cosmological Constant
Cosmological Constant
Transcript: Why is the universe accelerating, and how does this relate to the more standard cosmological idea that since... Read more
28 Jul 2011
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Evidence for Cosmic Acceleration
Evidence for Cosmic Acceleration
Transcript: The primary evidence that the universe is currently accelerating comes from distant supernovae. The observa... Read more
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Accelerating Universe
Accelerating Universe
Transcript: Standard cosmological models, where the universe is filled with matter and radiation, always have an expansi... Read more
28 Jul 2011
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Deacceleration Parameter
Deacceleration Parameter
Transcript: Universe with matter in it will be continuously decelerating over time since the big bang. Cosmologists ref... Read more
28 Jul 2011
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Density Parameter
Density Parameter
Transcript: Another fundamental quantity of the big bang model is the density parameter. It’s defined as the ratio of t... Read more
28 Jul 2011
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