<p>Divided into two parts, the first four chapters of <i>Comets and their Origin</i> refer to comets and their formation in general, describing cometary missions, comet remote observations, astrochemistry, artificial comets, and the chirality phenomenon.<br><br>The second part covers the cometary Rosetta mission, its launch, journey, scientific objectives, and instrumentations, as well as the landing scenario on a cometary nucleus. Along the way, the author presents general questions concerning the origin of terrestrial water and the molecular beginnings of life<br>on Earth, as well as how the instruments used on a space mission like Rosetta can help answer them. The text concludes with a chapter on what scientists expect from the Rosetta mission and how its data will influence our life on Earth.<br><br>As a result, the author elucidates highly topical and fascinating knowledge to scientists and students of various scientific backgrounds, allowing them to work with Rosetta‘s data.</p>