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Title:Introduction to Astrophysics (1-12)
Duration:06:28:22
Viewed:78,046
Published:08-03-2022
Source:Youtube

Introduction to Astrophysics (1-12) 1. Zooming Out to Distant Galaxies - 00:00:09 2. Zooming In to Fundamental Particles - 00:31:54 3. Making Maps of the Cosmos - 01:03:27 4. The Physics Demonstration in the Sky - 01:34:43 5. Newton’s Hardest Problem - 02:06:47 6. Tidal Forces - 02:41:59 7. Black Holes - 03:14:10 8. Photons and Particles - 03:46:00 9. Comparative Planetology - 04:19:37 10. Optical Telescopes - 04:51:26 11. Radio and X-Ray Telescopes - 05:23:01 12. The Message in a Spectrum - 05:55:57 Everyone loves to observe the beauty of the star-studded night sky, to say nothing of the dazzling images from the Hubble Space Telescope. But how many of us truly understand how stars shine, where Saturn's rings come from, or why galaxies have their distinctive shapes? Observational astronomy excels at imaging and cataloging celestial objects, but it takes a more rigorous discipline to come up with physical explanations for them. That field is astrophysics. Astrophysics uses the laws of physics to investigate everything beyond Earth. In the process, it has made breakthroughs such as these: Celestial motion: Astrophysics got its start with Isaac Newton's laws of motion and universal gravitation, proposed in the late 1600s. Together, these cornerstones of classical physics explain why everything in the universe moves the way it does. A universe of galaxies: In the 1920s, Edwin Hubble's study of an enigmatic nebula proved that it was, in fact, another galaxy—at a time when the Milky Way was thought to be the only galaxy there was. Since then, we have amassed evidence for hundreds of billions of galaxies. Exoplanets: The hunt for planets orbiting other stars was considered impractical, until a range of clever techniques were developed in the 1990s. Thousands of “exoplanets” have since been discovered, many in planetary orbits unlike anything seen in our solar system. Introduction to Astrophysics plunges you into this exciting quest, taking you step by step through the calculations that show how planets, stars, and galaxies work. In these 24 illuminating half-hour lectures, taught by noted astrophysicist Professor Joshua Winn of Princeton University, you tour the universe of exploding stars, colliding black holes, dark matter, and other wonders, just as in a traditional astronomy course. But Professor Winn takes you beyond the images and descriptions to teach you how to understand and solve the physics problems at the heart of the field. Throughout the course, Dr. Winn uses custom-designed graphics and animations to help you visualize what's happening. As he makes clear from the first lecture, this course relies heavily on high school and first-year college math. As Dr Winn says: “I'll also rely on first-year physics. Sometimes I'll go deeper—I'll use vectors, or take derivatives, which I hope will be helpful to those of you who've studied more math. But if not, don't worry, I promise to do my very best to help you understand the results, even if you can't follow every step.”

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