earth's orbit
71Near-Earth object — Asteroid 4179 Toutatis is a potentially hazardous object that has passed within 2.3 lunar distances …
72Horseshoe orbit — A horseshoe orbit appears when a viewer on an orbiting body (like Earth) watches the movement of another orbiting body, whose orbit is skinnier (more eccentric), but has about the same period. As a result, the path appears to have the shape of a… …
73Near-Earth asteroid — Near Earth asteroids (NEAs) are asteroids whose orbits are close to Earth s orbit. All near Earth asteroids spend part of their orbits between 0.983 and 1.3 astronomical units away from the Sun. Some near Earth asteroids orbits intersect Earth s… …
74Counter-Earth — For the Marvel Comics planet, see Counter Earth (comics). The Counter Earth is a hypothetical body of the Solar system first hypothesized by the presocratic philosopher Philolaus to support his non geocentric cosmology, in which all objects in… …
75Heliocentric orbit — A heliocentric orbit (also called circumsolar orbit) is an orbit around the Sun. All planets, comets, and asteroids in our Solar System are in such orbits, as are many artificial probes and pieces of debris. The moons of planets in the Solar… …
76Risks to civilization, humans and planet Earth — This article is about the near and very far future. For past civilizations, see Societal collapse. Contents 1 Types of risks 2 Future scenarios 2.1 …
77Lowell Observatory Near-Earth-Object Search — (LONEOS) was a project designed to discover asteroids and comets that orbit near the Earth. The project, funded by NASA, was directed by Dr. Ted Bowell of Lowell Observatory in Flagstaff, Arizona. The LONEOS project began in 1993 and ran until… …
78List of Earth characters in Stargate SG-1 — This is a list of characters from Earth in the science fiction television show Stargate SG 1 .Main characters from Earth* Jack O Neill (played by Kurt Russell in the film and Richard Dean Anderson in the series). A United States Air Force officer …
79Hohmann orbit — also called Transfer Orbit, most economical path (though not the shortest or fastest) for a spacecraft to take from one planet to another. The German engineer Walter Hohmann showed in 1925 that elliptical orbits tangent to the orbits of… …
80List of recurring Earth characters in Stargate SG-1 — This is a list of recurring characters from Earth in the science fiction television show Stargate SG 1. Contents 1 Stargate Command personnel 1.1 Kevin Elliot 1.2 Janet Fraiser 1.3 …
