Foundations of Modern Cosmology and the Early Universe

How did our universe begin, and what physical laws governed its earliest moments? Exploring the cosmos requires understanding both the massive scale of gravity and the microscopic world of particle physics. This course bridges these fields, offering a clear path to understanding the history and evolution of our universe. In this course, you will transition from a curious observer to a knowledgeable student of cosmology. You will learn how scientists reconstruct cosmic history, from the initial hot Big Bang to the formation of the first structures, using fundamental physical principles. By the end of the course, you will possess a solid conceptual and mathematical foundation in how space, time, and matter interact on a universal scale. What you'll learn: - Understand the foundational principles of classical cosmology and space-time expansion - Explore the cosmic microwave background radiation and what it reveals about the infant universe - Learn how modern particle physics explains the behavior of matter in high-energy, early-universe environments - Examine the theory of cosmic inflation and how it addresses classical cosmological puzzles - Analyze the roles of dark matter and dark energy in shaping the modern accelerating universe - Practice calculating cosmic expansion rates, scale factors, and redshift through written exercises The course begins with key terminology, basic concepts, and foundational definitions of space-time before moving into thermodynamic history, particle interactions, and modern observational frameworks. You will progress through detailed written explanations and structured practice problems designed to build your analytical confidence step-by-step. This course is designed for beginners, science enthusiasts, and students seeking a structured introduction to cosmology. No advanced background in astrophysics is required to start. Begin your journey through cosmic history and master the fundamentals of early universe physics today.