What The Final Star In The Universe Will Look Like Before The Lights Go Out Forever

Tonight we walk slowly to the very last moment of the cosmic stelliferous epoch and stand beside the final star that will ever burn in this universe. The star is out there, waiting to form. Not yet, of course. Not for approximately ten to the seventeenth years. But the physics that will eventually produce it is in the cosmos now, embedded in stellar populations and gas clouds and gravitational dynamics that will, across enormously long stretches of cosmic time, conspire to produce one specific final stellar object. Five truths about the very last star to ever burn in the cosmos. It will be smaller and dimmer than essentially any star observed by human astronomy, at the absolute minimum mass for sustained hydrogen fusion. It will burn for ten trillion to one hundred trillion years from its formation - one million times the current age of the universe. It will die in essentially perfect silence, with no supernova or planetary nebula, just gradual cooling over hundreds of millions of years. It will mark the absolute boundary of the cosmic stelliferous epoch, with no other star ever igniting after its death. And the cosmos will then continue, in the dark, for approximately ten to the eighty-third times longer than the entire stelliferous era ever lasted. A slow, sleep-friendly three-hour journey through M-dwarf stellar evolution physics, brown dwarf merger mechanisms, the Adams and Laughlin 1997 framework, and the death moment of the final star at approximately ten to the seventeenth years from the present. Spotify Episode Description (SEO-optimised) A long-form sleep documentary on the very last star to ever burn in the cosmos. We unpack M-dwarf evolution physics, the Laughlin Bodenheimer Adams 1997 lifetime calculations, brown dwarf collision dynamics and merger product properties, why low-mass stars never go through a red giant phase, the post-stelliferous cosmic aftermath, cosmic time comparisons that place the active stellar epoch as a brief exception in an enormously longer cosmic story, and what specifically happens after the final star dies. Topics covered: Fred Adams, Gregory Laughlin, Freeman Dyson, hydrogen fusion threshold, electron degeneracy pressure, fully convective stars, Population III nucleosynthesis legacy, Milkomeda, white dwarf cooling, Hawking radiation, Degenerate Era, Black Hole Era, Dark Era, cosmic energy budget. If your mind quietens as the cosmos expands around you, subscribe so the next sleep-doc finds you again. Sources Adams F C, Laughlin G 1997 - A dying universe the long-term fate and evolution of astrophysical objects, Reviews of Modern Physics - University of Michigan and Lick Observatory Adams F C, Laughlin G 1999 - The Five Ages of the Universe inside the physics of eternity, Free Press Laughlin G, Bodenheimer P, Adams F C 1997 - The end of the main sequence, Astrophysical Journal - University of California Santa Cruz Dyson F J 1979 - Time without end physics and biology in an open universe, Reviews of Modern Physics - Institute for Advanced Study Chabrier G, Baraffe I 2000 - Theory of low-mass stars and substellar objects, Annual Review of Astronomy and Astrophysics - Ecole Normale Superieure de Lyon Burrows A, Liebert J 1993 - The science of brown dwarfs, Reviews of Modern Physics - University of Arizona Adams F C, Bodenheimer P, Laughlin G 2005 - M dwarfs planet formation and long-term evolution, Astronomische Nachrichten - University of Michigan Hawking S W 1974 - Black hole explosions, Nature - University of Cambridge Page D N 1976 - Particle emission rates from a black hole massless particles from an uncharged nonrotating hole, Physical Review D - Caltech Riess A G, et al. 1998 - Observational evidence from supernovae for an accelerating universe, Astronomical Journal - High-Z Supernova Search Team Perlmutter S, et al. 1999 - Measurements of Omega and Lambda from 42 high redshift supernovae, Astrophysical Journal - Supernova Cosmology Project Cox T J, Loeb A 2008 - The collision between the Milky Way and Andromeda, MNRAS - Harvard CfA Althaus L G, Corsico A H, Isern J, Garcia-Berro E 2010 - Evolutionary and pulsational properties of white dwarf stars, Astronomy and Astrophysics Review - University of La Plata Choi J, et al. 2016 - MESA Isochrones and Stellar Tracks the MIST project, Astrophysical Journal - Harvard CfA