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1. Coordinate systems: This resource focuses on an introduction suitable for an introductory college physics course in electromagnetism. We describe three different coordinate systems, known as Cartesian, cylindrical and spherical. [100%] 2023-10-28 [Mathematics] [Physics]...
2. Astronomical coordinate systems: Astronomical (or celestial) coordinate systems are organized arrangements for specifying positions of satellites, planets, stars, galaxies, and other celestial objects relative to physical reference points available to a situated observer (e.g. the true horizon and north to an observer ... (Astronomy) [81%] 2023-10-02 [Astronomy] [Cartography]...
3. Unknown coordinate systems: At present, the geographic coordinates on Earth of latitude and longitude translate to right ascension and declination from the Greenwich meridian and the equator as projected on the celestial sphere. But, other records may exist even here on Earth that ... [81%] 2023-10-28 [Abstractions/Problems] [Astrophysics/Problems]...
4. Solar coordinate systems: In solar observation and imaging, coordinate systems are used to identify and communicate locations on and around the Sun. Since the Sun is gaseous in nature, there are no permanent demarcated points that can be referenced. (Astronomy) [81%] 2024-06-24 [Sun]
5. Galilean coordinate system: A system of coordinates in a pseudo-Euclidean space in which the line element has the form: $$ds^2=\sum e_idx_i^2,$$ where $e_i=\pm1$. The Galilean coordinate system is analogous to the Cartesian coordinate system in a Euclidean space. (Mathematics) [76%] 2023-10-26
6. Supergalactic coordinate system: The supergalactic plane is part of a reference frame for the supercluster of galaxies that contains the Milky Way galaxy. The supergalactic plane, as so-far observed, is more or less perpendicular to the plane of the Milky Way; the ... (Astronomy) [76%] 2023-12-21 [Extragalactic astronomy]
7. Celestial coordinate system: In astronomy, a celestial coordinate system (or celestial reference system) is a system for specifying positions of satellites, planets, stars, galaxies, and other celestial objects relative to physical reference points available to a situated observer (e.g. the true horizon ... (Astronomy) [76%] 2023-10-27 [Celestial coordinate system] [Astronomy]...
8. Geographic coordinate system: The geographic coordinate system (GCS) is a spherical or geodetic coordinate system for measuring and communicating positions directly on the Earth as latitude and longitude. It is the simplest, oldest and most widely used of the various spatial reference systems ... (System to specify locations on Earth) [76%] 2023-12-17 [Geographic coordinate systems] [Cartography]...
9. Selenographic coordinate system: The selenographic coordinate system is used to refer to locations on the surface of Earth's moon. Any position on the lunar surface can be referenced by specifying two numerical values, which are comparable to the latitude and longitude of ... (Coordinate system used on the Moon) [76%] 2023-10-26 [Lunar science] [Angle]...
10. Spherical coordinate system: In mathematics, a spherical coordinate system is a coordinate system for three-dimensional space where the position of a given point in space is specified by three numbers, (r, θ, φ): the radial distance of the radial line r connecting the point ... (3-dimensional coordinate system) [76%] 2023-12-14 [Orthogonal coordinate systems] [Three-dimensional coordinate systems]...
11. Equatorial coordinate system: The equatorial coordinate system is a celestial coordinate system widely used to specify the positions of celestial objects. It may be implemented in spherical or rectangular coordinates, both defined by an origin at the centre of Earth, a fundamental plane ... (Celestial coordinate system used to specify the positions of celestial objects) [76%] 2023-12-20 [Astronomical coordinate systems]
12. Planetary coordinate system: A planetary coordinate system (also referred to as planetographic, planetodetic, or planetocentric) is a generalization of the geographic, geodetic, and the geocentric coordinate systems for planets other than Earth. Similar coordinate systems are defined for other solid celestial bodies, such ... (Astronomy) [76%] 2023-10-27 [Planetary science] [Coordinate systems]...
13. Sigma coordinate system: The sigma coordinate system is a common coordinate system used in computational models for oceanography, meteorology and other fields where fluid dynamics are relevant. This coordinate system receives its name from the independent variable \displaystyle{ \sigma }[/math] used to represent ... (Earth) [76%] 2023-09-19 [Oceanography] [Numerical climate and weather models]...
14. Equatorial coordinate system: The equatorial coordinate system is a celestial coordinate system widely used to specify the positions of celestial objects. It may be implemented in spherical or rectangular coordinates, both defined by an origin at the centre of Earth, a fundamental plane ... (Astronomy) [76%] 2023-10-27 [Celestial coordinate system]
15. Barycentric coordinate system: In geometry, a barycentric coordinate system is a coordinate system in which the location of a point is specified by reference to a simplex (a triangle for points in a plane, a tetrahedron for points in three-dimensional space, etc ... (Coordinate system that is defined by points instead of vectors) [76%] 2023-10-26 [Linear algebra] [Affine geometry]...
16. Geographic coordinate system: The geographic coordinate system (GCS) is a spherical or geodetic coordinates system for measuring and communicating positions directly on the Earth as latitude and longitude. It is the simplest, oldest and most widely used of the various spatial reference systems ... (Earth) [76%] 2023-10-27 [Geographic coordinate systems] [Cartography]...
17. Perifocal coordinate system: The perifocal coordinate (PQW) system is a frame of reference for an orbit. The frame is centered at the focus of the orbit, i.e. [76%] 2024-01-02 [Coordinate systems] [Astrodynamics]...
18. Cartesian coordinate system: In geometry, a Cartesian coordinate system (UK: /kɑːˈtiːzjən/, US: /kɑːrˈtiʒən/) in a plane is a coordinate system that specifies each point uniquely by a pair of real numbers called coordinates, which are the signed distances to the point from two ... (Most common coordinate system (geometry)) [76%] 2023-10-26 [Orthogonal coordinate systems] [Elementary mathematics]...
19. Affine coordinate system: A rectilinear coordinate system in an affine space. An affine coordinate system on a plane is defined by an ordered pair of non-collinear vectors $ \mathbf e _ {1} $ and $ \mathbf e _ {2} $( an affine basis) and a point ... (Mathematics) [76%] 2023-10-27
20. Ecliptic coordinate system: The ecliptic coordinate system is a celestial coordinate system commonly used for representing the apparent positions, orbits, and pole orientations of Solar System objects. Because most planets (except Mercury) and many small Solar System bodies have orbits with only slight ... (Astronomy) [76%] 2023-10-27 [Celestial coordinate system]