Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Hephaestus Books represents a new publishing paradigm, allowing disparate content sources to be curated into cohesive, relevant, and informative books. To date, this content has been curated from Wikipedia articles and images under Creative Commons licensing, although as Hephaestus Books continues to increase in scope and dimension, more licensed and public domain content is being added. We believe books such as this represent a new and exciting lexicon in the sharing of human knowledge. This particular book contains chapters focused on Space simulators, Astronomy software, Linux planetarium software, Free astronomy software, Google Earth, Space flight simulation computer games, Space combat simulators, Wing Commander, Star Trek starship simulators, Space trading and combat simulators, Escape Velocity, X computer game series, Starwraith, FreeSpace series, Space trading and combat simulators, Escape Velocity, X computer game series, Starwraith, and Space simulation narrative-based game. More info: A space simulator is a system that tries to replicate or simulate outer space and/or the experience of space flight in a spacecraft as closely and realistically as possible. This includes full-size cockpit replicas mounted on hydraulic rams and controlled by state of the art computer technology; elaborate watertanks for simulation of weightlessness; and devices used by scientists to study the physics and environment of outer space.