Why Were the First Stars So Different?

To make a star, you have to cool the gas down. Not heat it — cool it. Gravity is happy to pull a cloud together forever, but compressing a gas heats it, and hot gas pushes back. Every star that has ever formed, including the Sun, formed because something in that cloud could take the heat and radiate it away: carbon, oxygen, silicon, carbon monoxide, water, grains of dust. Every single one of those is made by stars. Which left the first generation with a problem that sounds like a joke and is not — to make a star, you need the things that only stars can make. This is how the universe got out of that, what it had to use instead, and why the stars it produced were nothing like ours. No star from that first generation has ever been confirmed. Not one, at any distance. The search for them is live, and this is where it stands. CHAPTERS 0:00 To make a star, you have to cool it 1:14 What making a star actually requires 2:52 What does the cooling 4:34 The paradox 6:14 The imperfect coolant 8:07 Where this happened 9:49 What came out, and why none is confirmed 12:37 The last stars that had to work this way IMAGE CREDITS NASA/JPL-Caltech and the Spitzer Science Center (public domain). Barnard 68 and the Pipe Nebula: ESO The Milky Way's dark rift: ESO/S. Brunier Chamaeleon I: NASA, ESA, CSA, and M. Zamani (ESA/Webb); Science: F. Sun (Steward Observatory) The Perseus cloud: ESA/Webb, NASA & CSA, A. Scholz, K. Muzic, A. Langeveld, R. Jayawardhana A Perseus protostar: ESA/Webb, NASA & CSA, T. Ray (Dublin Institute for Advanced Studies) The Hubble Ultra Deep Field: NASA, ESA, and S. Beckwith (STScI) and the HUDF Team Webb's view of the Ultra Deep Field: NASA, ESA, CSA, J. DePasquale (STScI) Webb's First Deep Field: NASA, ESA, CSA, STScI The nine images above are licensed under CC BY 4.0: https://creativecommons.org/licenses/... Original diagrams created for this series, with AI assistance. Narration synthesized from the author's own voice.