The Cambridge Dictionary of Space Technology is a comprehensive source of reference to the most important aspects of this fast-developing field, from basic concepts to advanced applications. With some 2300 entries, it lists fundamental terms that will remain in common usage for the foreseeable future and includes a selection of historical and highly specific entries adding context and depth. The unprecedented breadth of coverage ensures that there are entries on all major subject areas. While the emphasis is on defining the meaning of a word or phrase, entries have been written with the intention of enhancing the understanding of the subject, both for the practising specialist and the interested layman. To assist the reader in research on a given topic, related entries are highlighted in the text and other important entries are cross-referenced. The Cambridge Dictionary of Space Technology will be indispensable to anyone with an interest in space activity.