This volume brings together a selection of articles from "Analog" Magazine about intriguing new ideas for the exploration and colonization of space, from descriptions of new types of rockets and space ships, to proposals for the colonization of the planets and for interstellar travel. "Analog" Magazine is a respected periodical for popular science readers. Its contributors produce a range of new proposals for space travel which are scientifically plausible, including plans for the exploration of Mars, proposals for interstellar travel at the speed of light, and the concept of "terraforming" other planets to make them hospitable for human life.