The Star That Has Been Burning Since the Beginning of Time

What is the oldest star in the universe, and could a red dwarf really still be burning since almost the beginning of time? In the outer halo of the Milky Way, astronomers have found stars so faint that no backyard telescope could ever show them, and so old that their light still carries the imprint of a universe barely finished cooling from its own birth. This is the full story of how a star's fate gets decided before it is even born: the universe's first light, three hundred eighty thousand years after the beginning, the giant, short-lived Population III stars that seeded the young cosmos with heavier elements, the simple rule of mass and fuel that lets a small red dwarf outlive entire galaxies of brighter neighbors, the slow internal stirring that keeps one burning through nearly all of its fuel instead of just its core, and the cosmic noon when star formation across the whole universe peaked and began to fade. One quick note: the visuals in this video are illustrations built to accompany the science, not real photographs or footage of these events. If a moment from this one stays with you, let me know which one in the comments, I read every one. Subscribe to Universe Decoded for more on the science of stars, planets, and the universe that holds them. Chapters: 0:00 Introduction 0:44 The Universe's First Light 4:51 Seeding the Cosmos 8:10 The Birth of a Patient Star 11:48 The Rule of Mass and Fuel 15:21 Fossils in the Halo 19:48 Correcting an Old Word 23:26 The Star That Stirs Itself 27:10 Our Ordinary Star, By Comparison 30:27 The Fast, Bright End of the Spectrum 33:50 Cosmic Noon, and the Slowing Sky 37:14 When the Bright Stars Are Gone 40:27 The Slow Fire's Distant Ending 44:09 Could Such a Star Actually Exist 47:54 The Last Embers of a Darkening Sky 51:11 What a Small Red Star Actually Teaches 54:18 Conclusion #Astronomy #Space #Science