Divided into two parts the first four chapters of comets and their origin refer to comets and their formation in general describing cometary missions comet remote observations astrochemistry artificial comets and the chirality phenomenon the second part covers the cometary rosetta mission its launch journey scientific objectives and instrumentations as well as the landing scenario . It is thought that most comets originate in a vast cloud of ice and dust that surrounds the solar system the oort cloud as it is called extends several thousand times farther from the sun than pluto the outermost planet. Originally published in 1953 this book first sets out some observational facts about comets then the greater part of the book accounts for their origin and explains how comet tails are formed the text contains 34 photographs of celebrated comets including eight of halleys comet a comet index is also provided this book will be of value to anyone with an interest in the development of astronomy and the history of science. Comets and their origin guillermo munoz caro comets are very primitive objects that formed far away from the sun and therefore provide important clues about the formation of the solar system these celestial objects might also be related to our own origin the appearance of the first life forms could have been triggered by asteroid comet impacts on the primitive earth in addition the