Respected Sir/Madam My question is:How can we prove stability of a space station having three torus rings around a cylinder fixes with each other?

Dear nanadu,

he National Space Society is proud to present this online edition of the complete text of the 1977 hardcover edition of the landmark book, Colonies in Space. The key ideas are presented in Chapter 2, with the rest of the book an elaboration on those ideas. We were not able to obtain permissions for many of the illustrations, but were able to include the nice color plates in the center of the book. See also our review of this book and our page about the author.

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