Catalog · The Early Universe Lecture 17 of 23 Lecture 17: Black-Body Radiation and the Early History of the Universe, Part III ← Previous Lecture 16: Black-Body Radiation and the Early History of the Universe, Part II Next → Lecture 18: Cosmic Microwave Background Spectrum and the Cosmological Constant, Part I ✓ Mark complete Materials Transcript (PDF) ↗ transcript