This book caters to readers eager to explore the disciplines, methods, and findings of space research, whether they encountered the field during their education or simply wish to understand Earth's space environment better. It is based on a series of lectures held at the University of Bonn, targeting a diverse audience of students and interested laypersons, with the only requirement being a foundational understanding of physics and mathematics typically gained from introductory science or engineering courses. Each phenomenon discussed is accompanied by specific knowledge, presented in a straightforward manner that prioritizes physical insight over mathematical precision. The author avoids clichéd expressions like "It may be easily shown that..." and instead provides clear, verifiable steps in the derivations, even if this approach may seem tedious to advanced readers. Numerous illustrations enhance clarity and understanding, often conveying more than words alone. Given the exponential growth of knowledge regarding Earth's space environment in recent decades, this text focuses on introductory aspects, recognizing that a comprehensive exploration would exceed its scope.
