How Many Neutrons Can You Stack Before Reality Breaks?

Video Description

Note: At 27:15–27:35, there's a segment with flashing lights (pulsar simulation). Just a heads-up for anyone who might be sensitive to that. You can help support this channel via the Physics Explained Patreon: https://www.patreon.com/physicsexplained What happens if you keep adding neutrons—forever? Is there a limit? And what does quantum mechanics and relativity have to do with it? This video explores the surprising physics of nuclear forces, quantum mechanics, and gravity to find out. We use back-of-the-envelope reasoning to estimate the mass limits of neutron stars and uncover why these strange objects are essential to the existence of elements, planets, and life itself. From the structure of the atomic nucleus to the death of massive stars, this is the story of how neutrons shape our universe. Sources and References: Schutz, B. F. (2003). Gravity from the Ground Up: An Introductory Guide to Gravity and General Relativity. Cambridge University Press. Thorne, K. S. (1994). Black Holes & Time Warps: Einstein’s Outrageous Legacy. W. W. Norton & Company. Rios, A., Pastore, A., Diget, C., Romero, A. M., Leech, K., & Stokoe, P. (2021). From nuclei to neutron stars: simple binding energy computer modelling in the classroom (part 1). Physics Education, 56(3), 035012. https://doi.org/10.1088/1361-6552/abe09d Rios, A., Pastore, A., Diget, C., Romero, A. M., Leech, K., & Stokoe, P. (2021). From nuclei to neutron stars: simple binding energy computer modelling in the classroom (part 2). arXiv preprint arXiv:2104.12449 [nucl-th]. https://arxiv.org/abs/2104.12449 Kaper, L., van der Meer, A., van Kerkwijk, M., & van den Heuvel, E. (n.d.). Measuring the masses of neutron stars. Astronomical Institute “Anton Pannekoek” and Centre for High Energy Astrophysics, University of Amsterdam; Department of Astronomy and Astrophysics, University of Toronto. (No DOI available — institutional publication) You can follow me on Instagram: https://www.instagram.com/physics_explained_ig You can follow me on X (Twitter): https://twitter.com/PhysicsExplain1