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Additional
equatorial coordinate system
English Wikipedia - The Free Encyclopedia
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Equatorial coordinate system
The
equatorial coordinate system
is a widely used
celestial coordinate system
used to specify the positions of celestial objects. It may be implemented in
spherical
or
rectangular
coordinates, both defined by an
origin
at the center of the
Earth
, a fundamental
plane
consisting of the projection of the Earth's
equator
onto the
celestial sphere
(forming the
celestial equator
), a primary direction towards the vernal
equinox
, and a
right-handed
convention.
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