Free trial of The Great Courses Signature Collection or buy
Terms apply
Prime membership required
Episodes
- S1 E1 - The Big Bang Changes EverythingJanuary 2, 202233minExplore the Big Bang model, which says the universe evolved from an initial hot, dense state billions of years ago. Find that the Big Bang wasn't a moment when the cosmos had zero size, it didn't take place at a special point in space, and it wasn't necessarily the beginning of the universe. Rather, it was the energetic start of the expansion phase that is still underway. #Science & MathematicsFree trial of The Great Courses Signature Collection or buy
- S1 E2 - The First Few Minutes of the UniverseJanuary 2, 202228minBeginning a hundred-billionth of a second after the Big Bang, trace events as the universe quickly cooled from a quadrillion degrees. Learn about the strong, weak, and electromagnetic forces, and the fundamental particles-all of which precipitated from the seething cauldron of energy, even as matter and antimatter were mutually annihilating.Free trial of The Great Courses Signature Collection or buy
- S1 E3 - First Galaxies, First Stars, and Dark MatterJanuary 2, 202231minContinue the story of the early universe by exploring such highlights as the formation of the first atoms at 370,000 years, when space transitioned from opaque to transparent; the accretion of hydrogen and helium gas into protogalaxies after millions of years due to gravitational influence of dark matter; and the collapse of the gas into ever denser balls eventually leading to the first stars.Free trial of The Great Courses Signature Collection or buy
- S1 E4 - How Big Was the Big Bang?January 2, 202230minIs it possible to calculate the size of the universe at the instant of the Big Bang? Assemble the clues that scientists use to address this question. In the process, discover a number of remarkable properties of the universe, including that it must be bigger that what we can see, extending beyond the boundary that limits our knowledge due to the finite speed of light and the age of the universe.Free trial of The Great Courses Signature Collection or buy
- S1 E5 - Mysteries That Reshaped the Big Bang ModelJanuary 2, 202231minEvaluate three mysteries connected to the Big Bang model that baffled theorists beginning in the late 1960s. Why was the early universe so uniform? Why does the universe obey the laws of geometry we teach in high school? And how did the universe come to be made of the kinds of particles we see and not others? A single solution to all three questions seemed too much to hope for, yet one turned up.Free trial of The Great Courses Signature Collection or buy
- S1 E6 - Inflation! The First Fraction of a SecondJanuary 2, 202232minDig into the bizarre theory of inflation developed by physicist Alan Guth, which holds that for a fraction of a second just after the Big Bang the universe expanded at a mind-boggling rate, making the cosmos effectively infinite. Analyze how this idea solves the three puzzles introduced earlier. Learn about associated concepts, such as the scalar field and its decay, known as “reheating.”Free trial of The Great Courses Signature Collection or buy
- S1 E7 - What Caused Inflation: The Scalar FieldJanuary 2, 202231minCan inflation possibly be true? See how a concept called a scalar field may be the inconceivably high-energy medium that spontaneously triggered inflation, leading to the observable universe-and more-in a billionth of a billionth of a billionth of a billionth of a second. Probe a rival theory that the Big Bang was caused by the collision of two universes in four-dimensional space.Free trial of The Great Courses Signature Collection or buy
- S1 E8 - More than One Big Bang in a Multiverse?January 2, 202230minAt one time, Earth was considered the center of the cosmos. Might the idea that the Big Bang was the beginning of everything be just as parochial? Take a mindboggling trip through the theory of eternal inflation-that our observable universe is a nearly infinitesimal speck inside a much larger, older, and eternally growing multiverse, in which inflation continually sprouts new universes like ours.Free trial of The Great Courses Signature Collection or buy
- S1 E9 - Other Universes across Other Dimensions?January 2, 202231minMany physicists believe that our universe really isn't three dimensional, but only appears so to us. Explore what it would mean if there are extra dimensions that we can't see. Learn how to visualize this counterintuitive state, and examine what it implies for Big Bang theory and the concept of a multiverse. One set of ideas that calls for at least nine dimensions is string theory.Free trial of The Great Courses Signature Collection or buy
- S1 E10 - The Origins of the Constants of NatureJanuary 2, 202230minConstants of nature, such as the gravitational constant, appear to be fine-tuned to make life possible. Is this a coincidence of astronomical unlikelihood, an expected outcome of the nature of the universe, or does it imply that ours is one of many universes with different properties? Consider this question in light of the anthropic principle which takes the existence of observers into account.Free trial of The Great Courses Signature Collection or buy
- S1 E11 - From the Big Bang to the Universe's FateJanuary 2, 202231minLearn that the ultimate fate of the universe is tied to its beginning-to the as-yet-unknown conditions that preceded the Big Bang. Focus on the importance of dark energy, an enigmatic force discovered in the 1990s that is causing the universe to expand at an accelerating rate. Compare three scenarios that lead to either infinite expansion or eventual collapse in a Big Crunch.Free trial of The Great Courses Signature Collection or buy
- S1 E12 - The Future of Early Universe CosmologyJanuary 2, 202234minConclude the series by reviewing the history of the universe, highlighting the major gaps in our knowledge. Then turn to four promising areas of experimental research that may provide answers. Let your imagination soar by contemplating theoretical possibilities such as this one: Could we exploit inflation to create a baby universe in the lab? Do we, in fact, live in someone else's baby universe?Free trial of The Great Courses Signature Collection or buy
Details
More info
By clicking play, you agree to our Terms of Use.