error ellipse
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Circle-ellipse problem — The circle ellipse problem in software development (sometimes known as the square rectangle problem) illustrates a number of pitfalls which can arise when using subtype polymorphism in object modelling. The issues are most commonly encountered… … Wikipedia
Asteroid-impact avoidance — Planetary defense redirects here. For defending against alien invasion in fiction, see alien invasion. Artist s impression of a major impact event. The collision between Earth and an asteroid a few kilometres in diameter releases as much energy… … Wikipedia
Near-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… … Wikipedia
Position fixing — is the branch of navigation concerned with the use of a variety of visual and electronic methods to determine the position of a ship, aircraft or person on the surface of the Earth.These techniques include:* Position lines and position circles *… … Wikipedia
Gravitational keyhole — A gravitational keyhole, or resonance keyhole, is a small region of space that if an asteroid were to pass through it, its course would be altered due to Earth s gravity in a way that could cause such an asteroid to collide with the Earth on its… … Wikipedia
celestial mechanics — the branch of astronomy that deals with the application of the laws of dynamics and Newton s law of gravitation to the motions of heavenly bodies. [1815 25] * * * Branch of astronomy that deals with the mathematical theory of the motions of… … Universalium
physical science, principles of — Introduction the procedures and concepts employed by those who study the inorganic world. physical science, like all the natural sciences, is concerned with describing and relating to one another those experiences of the surrounding… … Universalium
Mars Science Laboratory — mission 2011 concept artwork Operator NASA Major contractors Boeing Lockheed Martin … Wikipedia
analysis — /euh nal euh sis/, n., pl. analyses / seez /. 1. the separating of any material or abstract entity into its constituent elements (opposed to synthesis). 2. this process as a method of studying the nature of something or of determining its… … Universalium
Midpoint circle algorithm — In computer graphics, the midpoint circle algorithm is an algorithm used to determine the points needed for drawing a circle. The algorithm is a variant of Bresenham s line algorithm, and is thus sometimes known as Bresenham s circle algorithm,… … Wikipedia
geometry — /jee om i tree/, n. 1. the branch of mathematics that deals with the deduction of the properties, measurement, and relationships of points, lines, angles, and figures in space from their defining conditions by means of certain assumed properties… … Universalium
