Fundamental plane (spherical coordinates) | Wikipedia audio article
Channel: wikipedia tts
Date: 2019-05-29

This is an audio version of the Wikipedia Article:
https://en.wikipedia.org/wiki/Fundamental_plane_(spherical_coordinates)


00:00:56 See also



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SUMMARY
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The fundamental plane in a spherical coordinate system is a plane of reference that divides the sphere into two hemispheres. The latitude of a point is then the angle between the fundamental plane and the line joining the point to the centre of the sphere.For a geographic coordinate system of the Earth, the fundamental plane is the Equator. Celestial coordinate systems have varying fundamental planes:
The horizontal coordinate system uses the observer's horizon.
The Besselian coordinate system uses Earth's terminator (day/night boundary). This is a Cartesian coordinate system (x, y, z).
The equatorial coordinate system uses the celestial equator.
The ecliptic coordinate system uses the ecliptic.
The galactic coordinate system uses the Milky Way's galactic equator.