The Cambridge Dictionary of Space Technology is a comprehensive source of reference on the most important aspects of this fast-developing field, from basic concepts to advanced applications. With some 2,300 entries—700 more than the first edition, it lists fundamental terms that will remain in common usage for the foreseeable future and includes a selection of historical and highly specific entries to add context and depth. The Dictionary features entries on all the major areas relating to space technology, making this a reference of wide-ranging scope. While the emphasis is on defining the meaning of a word or phrase as it is used in the professional space community, each entry also contributes to a deeper understanding of the overall subject, both for the practicing specialist and 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. An additional key feature is a classified list of entries grouped under 13 subject headings. The Cambridge Dictionary of Space Technology will be indispensable to anyone with an interest in space activity. Mark Williamson is an independent space technology consultant working in the space industry and space insurance communities. A seasoned physicist and engineer, he has over 20 years of experience in satellite communications engineering, technical management, and space consultancy. Williamson has written about 250 published magazine and journal articles. He is also author of The Communications Satellite and editorial director of Earth Space Review magazine.