Unraveling the Cosmic Microwave Background

This chapter explores the key concepts of modern cosmology, focusing on the discovery and significance of the cosmic microwave background (CMB) radiation. It highlights the historical context of the expanding universe, pivotal discoveries in the 1920s, and the serendipitous nature of the CMB's discovery in the 1960s. The narrative delves into the impact of temperature variations and inhomogeneities in the CMB, shedding light on the early universe and the formation of cosmic structures.