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Dr. Carroll explains the subject of dark matter and dark energy in 24 lectures. He explains why scientists believe we live in a smooth, expanding universe that originated in a hot, dense state called the Big Bang. He describes the features of the infant universe that led to the large-scale structure we observe today. He takes you through the standard model of particle physics and shows how it provides the framework for understanding the interaction...
Description
Einstein's Theory of General Relativity is still one of the pillars of modern physics. But 100 years after Einstein's theory, there's something that seems to undermine everything we thought we knew - Dark Energy. This mysterious cosmic force is not only causing our universe to expand, but this expansion is also accelerating. It makes up 70% of the universe. But no one can see it, and there is still great debate over what it actually is. This BBC Horizon...
Description
Why are we talking about dark energy again? Because another team has just announced a new analysis of updated supernova data. They claim that the data are consistent with there being NO dark energy - no accelerating expansion. They suggest that the universe may just be expanding at a constant rate - never speeding up, but also not slowing down.
Author
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"One of the most important unsolved problems of current physics, astronomy, and cosmology is the nature of dark matter and dark energy. These two invisible components of the universe seem to control the behavior of galaxies, clusters of galaxies, and the accelerating expansion of the universe, but we do not know what they are. Dark Matters offers a unified explanation for dark matter and dark energy, and, in doing so, formulates a new theory of ordinary...
Description
We've come a long way in our understanding of dark energy. In previous episodes we've looked at how our universe is paradoxically flat and how dark energy is exponentially accelerating the expansion of the universe. Now, let's dive into the true nature of dark energy and how its antigravity effect and its other properties are having such bizarre effects on our universe.
Author
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"Heart of Darkness describes the incredible saga of humankind's quest to unravel the deepest secrets of the universe. Over the past thirty years, scientists have learned that two little-understood components--dark matter and dark energy--comprise most of the known cosmos, explain the growth of all cosmic structure, and hold the key to the universe's fate."--Jacket.
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One of the world's leading astronomers takes readers inside a lively research team on the quest that led them to an extraordinary cosmological discovery: the expansion of the universe is accelerating under the influence of a dark energy that makes space itself expand. In addition to sharing the story of this exciting discovery, the author also brings the science up-to-date in a new epilogue. He explains how the idea of an accelerating universe - once...
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"For over ten years, the dark side of the universe has been headline news. Detailed studies of the rotation of spiral galaxies, and 'mirages' created by clusters of galaxies bending the light from very remote objects, have convinced astronomers of the presence of large quantities of dark (unseen) matter in the cosmos. The most striking fact is that they seem to compromise about 95% of the matter/energy content of the universe. As for ordinary matter,...
Description
An astronomer recently made an unexpected discovery - that the universe is expanding faster than ever and is actually being pushed apart. This episode of NOVA follows two rival astronomy teams as they work to unlock the secrets of the universe, including the riddle of a mysterious force that some scientists believe counteracts gravity. Stunning three-dimensional cosmic simulations captured with revolutionary high-definition technology illustrate the...
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Description
Evalyn Gates transports us to the edge of science to explore the tool that unlocks the secrets of dark matter and dark energy. Based on the theory of general relativity, gravitational lensing, or 'Einstein's Telescope', is enabling discoveries that are taking us towards the next revolution in scientific thinking--one that may change our understanding of where the Universe came from and where it is going.
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