earth's orbit
121High Earth orbit — A High Earth Orbit is a geocentric orbit whose apogee lies above that of a geosynchronous orbit (35,786 km) [ [http://gcmd.nasa.gov/User/suppguide/platforms/orbit.html Orbit ] ] .Highly Elliptical Orbits are generally considered to be a subset of …
122Properties of the Moon and the Earth-Moon system — ▪ Table Properties of the Moon and the Earth Moon system Moon Earth approximate ratio (Moon to Earth) mean distance from Earth (orbital radius) 384,400 km period of orbit around Earth (sidereal period of revolution) 27.3217 Earth days inclination …
123Rare-Earth-Hypothese — Sind Planeten, die Leben ermöglichen wie die Erde, selten? Die Rare Earth Hypothese (dt. Seltene Erde Hypothese) vertritt den Standpunkt, dass beim Auftauchen und der Entwicklung von komplexem Vielzeller Leben (Metazoa) auf der Erde sehr… …
124Air launch to orbit — is the method of launching booster rockets at altitude from a horizontal takeoff turbojet aircraft, either subsonic or supersonic. This method, when employed for orbital payload insertion, presents significant advantages over conventional… …
125List of Earth starships in Stargate — In the science fiction television series Stargate SG 1 and its sequels, several types of starships are introduced in the later seasons. In the series, they are the product of several years worth of research into alien technologies discovered on… …
126Highly Elliptical Orbit — (HEO) is an elliptic orbit characterized by a relatively low altitude perigee and an extremely high altitude apogee. These extremely elongated orbits can have the advantage of long dwell times at a point in the sky during the approach to and… …
127Mars orbit rendezvous — Artist s concept of a Mars orbit rendezvous between a spaceship and the Martian ascent stage. Mars orbit rendezvous (MOR) is a concept for space travel, where a spacecraft takes off from Mars (a martian ascent stage) and does a rendezvous in Mars …
128Mutants in Orbit —   …
