The innate curiosity that drives us to explore the mysteries beyond our celestial sky, to understand the origins of everything, and to contemplate the vastness of this world leads us on an exhilarating journey into the exciting field of study “cosmology” Study of the origin, evolution, structure formation, dynamics, and the ultimate fate of the universe.

Our journey begins with an “Introduction to Cosmology,” of- fering you a solid footing in the subject’s fundamentals. We then delve into “Historical Perspectives,” tracing the evolution of cosmological thoughts from ancient Mesopotamia to the Newtonian Revolution and beyond. You’ll witness the emergence of the “Expanding Universe,” as we explore the groundbreaking work of Edwin Hubble and the existential reflections it has inspired.

The heart of our exploration lies in "The Big Bang Theory," where we uncover the quest for cosmic origins and the first moments of our universe. We navigate through the mysteries of gravity and gravity theories, from Newton’s insights to Einstein’s groundbreaking theories of relativity.

As we journey further, we delve into the “Evolution of Cosmic Structures,” investigating the life cycle of stars, the Milky Way galaxy, and the cosmic web of large-scale structures. We also encounter high-energy phenomena like black holes, neutron stars, quasars, and gravitational waves.

The “Cosmic Microwave Background” introduces you to the cosmic relic of the Big Bang, and "Cosmological Modeling" explains how we construct models to understand the universe’s evolution. Finally, we explore the enigmatic realms of “Dark Matter and Dark Energy” and peer into the future of cosmological research.

This book is a guide to understanding the cosmos, a journey of exploration and discovery. It is designed to make the complex simple, the distant accessible, and the unknown exciting. As you read these pages, we hope you’ll embrace the wonder of the universe and find inspiration to gaze at the night sky with a newfound sense of wonder.

This introduction is your road map whether you’re an as- tronomer staring through a telescope or a daydreamer who has looked up at the stars and thought about the cosmos.

Keep in mind that we are all cosmic travelers as we navigate these cosmic pages. Beyond the arbitrary distinctions between our respective countries and flags, our shared humanity unites us. Our ability to think deeply about the deep mysteries of the cosmos and our shared curiosity define who we are as a species. Let us therefore paint the concepts of cosmology  into  the canvas of our understanding, connected by our shared humanity and propelled by our shared desire to comprehend the cosmos.