72 relations: A Treatise on the Astrolabe, Alfonso X of Castile, Alpha, Angle, Astrolabe, Astrometry, Astronomy, Atan2, Azimuth thruster, Azimuthal equidistant projection, Azimuthal quantum number, Ballistics, Bearing (navigation), Cardinal direction, Celestial coordinate system, Celestial equator, Celestial navigation, Clockwise, Coordinate system, Course (navigation), Culmination, Cylindrical coordinate system, Declination, Degree (angle), Engineering, Euclidean vector, Geoffrey Chaucer, Gradian, Graphical projection, Horizon, Horizontal coordinate system, Hour angle, Latitude, Libros del saber de astronomía, Longitude, Magnetic declination, Map, Meridian (astronomy), Meridian (geography), Milliradian, Navigation, North, Orbital inclination, Origin (mathematics), Panning (camera), Perpendicular, Phi, Plane (geometry), Plane of reference, Polar coordinate system, ..., Propeller, Radian, Right ascension, Satellite dish, Satellite finder, Sea level, Sextant, Shipbuilding, Solar azimuth angle, Sound localization, Spatial reference system, Spherical coordinate system, Spheroid, Star, Sun and moon letters, Tape drive, Theta, Triangulation, True north, Vector space, World Geodetic System, Zenith. Expand index (22 more) »

## A Treatise on the Astrolabe

A Treatise on the Astrolabe is a medieval instruction manual on the astrolabe by Geoffrey Chaucer.

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## Alfonso X of Castile

Alfonso X (also occasionally Alphonso, Alphonse, or Alfons, 23 November 1221 – 4 April 1284), called the Wise (el Sabio), was the King of Castile, León and Galicia from 30 May 1252 until his death in 1284.

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## Alpha

Alpha (uppercase, lowercase; ἄλφα, álpha, modern pronunciation álfa) is the first letter of the Greek alphabet.

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## Angle

In plane geometry, an angle is the figure formed by two rays, called the sides of the angle, sharing a common endpoint, called the vertex of the angle.

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## Astrolabe

An astrolabe (ἀστρολάβος astrolabos; ٱلأَسْطُرلاب al-Asturlāb; اَختِرِیاب Akhteriab) is an elaborate inclinometer, historically used by astronomers and navigators to measure the inclined position in the sky of a celestial body, day or night.

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## Astrometry

Astrometry is the branch of astronomy that involves precise measurements of the positions and movements of stars and other celestial bodies.

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## Astronomy

Astronomy (from ἀστρονομία) is a natural science that studies celestial objects and phenomena.

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## Atan2

The function \operatorname (y,x) or \operatorname (y,x) is defined as the angle in the Euclidean plane, given in rad, between the positive x-axis and the ray to the Points in the upper half-plane deliver values in points with.

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## Azimuth thruster

An azimuth thruster is a configuration of marine propellers placed in pods that can be rotated to any horizontal angle (azimuth), making a rudder unnecessary.

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## Azimuthal equidistant projection

The azimuthal equidistant projection is an azimuthal map projection.

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## Azimuthal quantum number

The azimuthal quantum number is a quantum number for an atomic orbital that determines its orbital angular momentum and describes the shape of the orbital.

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## Ballistics

Ballistics is the field of mechanics that deals with the launching, flight, behavior, and effects of projectiles, especially bullets, unguided bombs, rockets, or the like; the science or art of designing and accelerating projectiles so as to achieve a desired performance.

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## Bearing (navigation)

In navigation bearing may refer, depending on the context, to any of: (A) the direction or course of motion itself; (B) the direction of a distant object relative to the current course (or the "change" in course that would be needed to get to that distant object); or (C), the angle away from North of a distant point as observed at the current point.

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## Cardinal direction

The four cardinal directions or cardinal points are the directions north, east, south, and west, commonly denoted by their initials N, E, S, and W. East and west are at right angles to north and south, with east being in the clockwise direction of rotation from north and west being directly opposite east.

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## Celestial coordinate system

In astronomy, a celestial coordinate system is a system for specifying positions of celestial objects: satellites, planets, stars, galaxies, and so on.

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## Celestial equator

The celestial equator is the great circle of the imaginary celestial sphere on the same plane as the equator of Earth.

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## Celestial navigation

Celestial navigation, also known as astronavigation, is the ancient and modern practice of position fixing that enables a navigator to transition through a space without having to rely on estimated calculations, or dead reckoning, to know their position.

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## Clockwise

Two-dimensional rotation can occur in two possible directions.

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## Coordinate system

In geometry, a coordinate system is a system which uses one or more numbers, or coordinates, to uniquely determine the position of the points or other geometric elements on a manifold such as Euclidean space.

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## Course (navigation)

In navigation, a vessel's or aircraft's course is the cardinal direction along which the vessel or aircraft is to be steered.

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## Culmination

In astronomy, the culmination of a planet, star, or constellation is its transit over an observer's meridian.

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## Cylindrical coordinate system

A cylindrical coordinate system is a three-dimensional coordinate system that specifies point positions by the distance from a chosen reference axis, the direction from the axis relative to a chosen reference direction, and the distance from a chosen reference plane perpendicular to the axis.

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## Declination

In astronomy, declination (abbreviated dec; symbol δ) is one of the two angles that locate a point on the celestial sphere in the equatorial coordinate system, the other being hour angle.

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## Degree (angle)

A degree (in full, a degree of arc, arc degree, or arcdegree), usually denoted by ° (the degree symbol), is a measurement of a plane angle, defined so that a full rotation is 360 degrees.

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## Engineering

Engineering is the creative application of science, mathematical methods, and empirical evidence to the innovation, design, construction, operation and maintenance of structures, machines, materials, devices, systems, processes, and organizations.

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## Euclidean vector

In mathematics, physics, and engineering, a Euclidean vector (sometimes called a geometric or spatial vector, or—as here—simply a vector) is a geometric object that has magnitude (or length) and direction.

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## Geoffrey Chaucer

Geoffrey Chaucer (c. 1343 – 25 October 1400), known as the Father of English literature, is widely considered the greatest English poet of the Middle Ages.

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## Gradian

The gradian is a unit of measurement of an angle, equivalent to \frac of a turn, \frac of a degree, or \frac of a radian.

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## Graphical projection

Graphical projection is a protocol, used in technical drawing, by which an image of a three-dimensional object is projected onto a planar surface without the aid of numerical calculation.

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## Horizon

The horizon or skyline is the apparent line that separates earth from sky, the line that divides all visible directions into two categories: those that intersect the Earth's surface, and those that do not.

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## Horizontal coordinate system

The horizontal coordinate system is a celestial coordinate system that uses the observer's local horizon as the fundamental plane.

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## Hour angle

In astronomy and celestial navigation, the hour angle is one of the coordinates used in the equatorial coordinate system to give the direction of a point on the celestial sphere.

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## Latitude

In geography, latitude is a geographic coordinate that specifies the north–south position of a point on the Earth's surface.

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## Libros del saber de astronomía

The Libros del saber de astronomía del rey Alfonso X de Castilla, "Books of wisdom of astronomy of King Alfonso X of Castile", is a series of books of the medieval period, composed during the reign of Alfonso X of Castile.

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## Longitude

Longitude, is a geographic coordinate that specifies the east-west position of a point on the Earth's surface.

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## Magnetic declination

Magnetic declination or variation is the angle on the horizontal plane between magnetic north (the direction the north end of a compass needle points, corresponding to the direction of the Earth's magnetic field lines) and true north (the direction along a meridian towards the geographic North Pole).

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## Map

A map is a symbolic depiction emphasizing relationships between elements of some space, such as objects, regions, or themes.

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## Meridian (astronomy)

In astronomy, the meridian is the great circle passing through the celestial poles, the zenith, and the nadir of an observer's location.

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## Meridian (geography)

A (geographical) meridian (or line of longitude) is the half of an imaginary great circle on the Earth's surface, terminated by the North Pole and the South Pole, connecting points of equal longitude.

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## Milliradian

A milliradian, often called a mil or mrad, is an SI derived unit for angular measurement which is defined as a thousandth of a radian (0.001 radian).

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## Navigation

Navigation is a field of study that focuses on the process of monitoring and controlling the movement of a craft or vehicle from one place to another.

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## North

North is one of the four compass points or cardinal directions.

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## Orbital inclination

Orbital inclination measures the tilt of an object's orbit around a celestial body.

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## Origin (mathematics)

In mathematics, the origin of a Euclidean space is a special point, usually denoted by the letter O, used as a fixed point of reference for the geometry of the surrounding space.

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## Panning (camera)

In cinematography and photography panning means swivelling a still or video camera horizontally from a fixed position.

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## Perpendicular

In elementary geometry, the property of being perpendicular (perpendicularity) is the relationship between two lines which meet at a right angle (90 degrees).

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## Phi

Phi (uppercase Φ, lowercase φ or ϕ; ϕεῖ pheî; φι fi) is the 21st letter of the Greek alphabet.

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## Plane (geometry)

In mathematics, a plane is a flat, two-dimensional surface that extends infinitely far.

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## Plane of reference

In celestial mechanics, the plane of reference (or reference plane) is the plane used to define orbital elements (positions).

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## Polar coordinate system

In mathematics, the polar coordinate system is a two-dimensional coordinate system in which each point on a plane is determined by a distance from a reference point and an angle from a reference direction.

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## Propeller

A propeller is a type of fan that transmits power by converting rotational motion into thrust.

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## Radian

The radian (SI symbol rad) is the SI unit for measuring angles, and is the standard unit of angular measure used in many areas of mathematics.

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## Right ascension

Right ascension (abbreviated RA; symbol) is the angular distance measured only eastward along the celestial equator from the Sun at the March equinox to the (hour circle of the) point above the earth in question.

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## Satellite dish

A satellite dish is a dish-shaped type of parabolic antenna designed to receive or transmit information by radio waves to or from a communication satellite.

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## Satellite finder

Sat finder A satellite finder (or sat finder) is a satellite signal meter used to accurately point satellite dishes at communications satellites in geostationary orbit.

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## Sea level

Mean sea level (MSL) (often shortened to sea level) is an average level of the surface of one or more of Earth's oceans from which heights such as elevations may be measured.

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## Sextant

A sextant is a doubly reflecting navigation instrument that measures the angular distance between two visible objects.

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## Shipbuilding

Shipbuilding is the construction of ships and other floating vessels.

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## Solar azimuth angle

The solar azimuth angle is the azimuth angle of the Sun's position.

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## Sound localization

Sound localization is a listener's ability to identify the location or origin of a detected sound in direction and distance.

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## Spatial reference system

A spatial reference system (SRS) or coordinate reference system (CRS) is a coordinate-based local, regional or global system used to locate geographical entities.

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## Spherical coordinate system

In mathematics, a spherical coordinate system is a coordinate system for three-dimensional space where the position of a point is specified by three numbers: the radial distance of that point from a fixed origin, its polar angle measured from a fixed zenith direction, and the azimuth angle of its orthogonal projection on a reference plane that passes through the origin and is orthogonal to the zenith, measured from a fixed reference direction on that plane.

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## Spheroid

A spheroid, or ellipsoid of revolution, is a quadric surface obtained by rotating an ellipse about one of its principal axes; in other words, an ellipsoid with two equal semi-diameters.

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## Star

A star is type of astronomical object consisting of a luminous spheroid of plasma held together by its own gravity.

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## Sun and moon letters

In Arabic and Maltese, the consonants are divided into two groups, called the sun letters or solar letters (حروف شمسية) and moon letters or lunar letters (حروف قمرية), based on whether they assimilate the letter (ﻝ) of a preceding definite article al- (الـ).

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## Tape drive

A tape drive is a data storage device that reads and writes data on a magnetic tape.

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## Theta

Theta (uppercase Θ or ϴ, lowercase θ (which resembles digit 0 with horizontal line) or ϑ; θῆτα thē̂ta; Modern: θήτα| thī́ta) is the eighth letter of the Greek alphabet, derived from the Phoenician letter Teth.

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## Triangulation

In trigonometry and geometry, triangulation is the process of determining the location of a point by forming triangles to it from known points.

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## True north

True north (also called geodetic north) is the direction along Earth's surface towards the geographic North Pole.

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## Vector space

A vector space (also called a linear space) is a collection of objects called vectors, which may be added together and multiplied ("scaled") by numbers, called scalars.

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## World Geodetic System

The World Geodetic System (WGS) is a standard for use in cartography, geodesy, and satellite navigation including GPS.

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## Zenith

The zenith is an imaginary point directly "above" a particular location, on the imaginary celestial sphere.

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## Redirects here:

Angle of azimuth, Azimuth angle, Azimuthal, Azimuthal angle, Azmuth, Degree Azimuth, Degrees azimuth, Flight azimuth, Flight azimuths.

## References

[1] https://en.wikipedia.org/wiki/Azimuth