geosynchronous earth observation system
31Interstellar travel — Montage of fusion powered rocket concepts from 1987–2004, which could form the basis for an interstellar vehicle. Included are: VISTA (Lawrence Livermore National Laboratories,1987), Discovery II (NASA/GRC, 2002), Human Outer Planet Exploration… …
32Project Gemini — This article is about the NASA program. For other uses, see Gemini (disambiguation). Project Gemini Duration 1962 1966 Goals Long duration spaceflight; rendezvous and docking; extra vehicular activity; targeted re entry and Earth landing …
33Private spaceflight — This article is about non governmental spaceflight. For paying space tourists, see Space tourism. For general commercial use of space, see Commercialization of space. Astronaut Dale A. Gardner holding a For Sale sign Private spaceflight is flight …
34Sun-synchronous orbit — Diagram showing the orientation of a Sun synchronous orbit (green) in four points of the year. A non sun synchronous orbit (magenta) is also shown for reference A Sun synchronous orbit (sometimes called a heliosynchronous orbit) is a geocentric… …
35Orbital mechanics — A satellite orbiting the earth has a tangential velocity and an inward acceleration. Orbital mechanics or astrodynamics is the application of ballistics and celestial mechanics to the practical problems concerning the motion of rockets and other… …
36Mir — This article is about the Soviet/Russian space station. For other uses, see Mir (disambiguation). Mir …
37Orbital station-keeping — In astrodynamics orbital station keeping is a term used to describe the orbital maneuvers made by thruster burns that are needed to keep a spacecraft in a particular assigned orbit. For many Earth satellites the effects of the non Keplerian… …
38Commercialization of space — A DIRECTV satellite dish on a roof Commercialization of space is the use of equipment sent into or through outer space to provide goods or services of commercial value, either by a corporation or state. Examples of the commercial use of space… …
39International Space Station — ISS redirects here. For other uses, see ISS (disambiguation). International Space Station …
40Space colonization — Artist Les Bossinas 1989 concept of Mars mission Space colonization (also called space settlement, space humanization, or space habitation) is the concept of permanent human habitation outside of Earth. Although hypothetical at the present time,… …
