Answering Fan Questions About Nuclear Fusion, the Smallest Unit of Time and the Early Universe

Video Description

Can nuclear fusion become the ultimate renewable energy source? Neil deGrasse Tyson and co-host Chuck Nice answer fan questions about transporters, the smallest unit of time, expansion, and other ideas that push the boundaries of our understanding of the universe. The discussion begins with an exploration of nuclear fusion, the process that powers the stars. Neil explains the difference between fission and fusion, and the challenges of achieving controlled fusion on Earth and the potential it holds for revolutionizing our energy systems. They touch on recent breakthroughs that have brought us closer to harnessing fusion power, highlighting the promise and obstacles that remain. Next, the duo examines the expansion of the universe, explaining why objects farther away from us appear to be receding faster and what this tells us about the nature of cosmic expansion. Neil offers insights into how time dilation affects our perception of movement and how the principles of relativity can lead to surprising conclusions about everyday phenomena. The episode also tackles the origins of the cosmic microwave background (CMB) and how scientists have calculated the time between the Big Bang and the formation of the CMB. Neil emphasizes the importance of well-established physics in these measurements, demonstrating how precise observations and theoretical predictions work hand in hand to deepen our understanding of the universe. We explore the possibility of measuring time shorter than a zeptosecond. They also touch on the limitations of our current technology and the philosophical implications of measuring the infinitely small. Finally, they consider the feasibility of Star Trek-style transporters, with Neil offering a scientific perspective on why such technology might not be necessary if future advancements, like wormholes, become a reality. Timestamps: 00:00 - Introduction: Grab Bag 03:05 - Using Article Fusion as a Renewable Energy Source 11:05 - Why Isn’t Expansion Slowing Down? 14:16 - Melting Glaciers 20:12 - Can an Object Move Slower Than Everything Else in the Universe? 26:01 - How Did We Find The Big Bang From The First Light 32:59 - Will There Be a Space War? 35:30 - The Smallest Unit of Time & Zeno’s Paradox 39:05 - Is The Transporter From Star Trek possible? Check out our second channel, @StarTalkPlus Get the NEW StarTalk book, 'To Infinity and Beyond: A Journey of Cosmic Discovery' on Amazon: https://amzn.to/3PL0NFn Support us on Patreon: https://www.patreon.com/startalkradio FOLLOW or SUBSCRIBE to StarTalk: Twitter: http://twitter.com/startalkradio Facebook: https://www.facebook.com/StarTalk Instagram: https://www.instagram.com/startalk About StarTalk: Science meets pop culture on StarTalk! Astrophysicist & Hayden Planetarium director Neil deGrasse Tyson, his comic co-hosts, guest celebrities & scientists discuss astronomy, physics, and everything else about life in the universe. Keep Looking Up! #StarTalk #NeildeGrasseTyson