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Additional
Equinox (celestial coordinates)
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Equinox (celestial coordinates)
In
astronomy
,
equinox
is a moment in time at which the vernal point,
celestial equator
, and other such elements are taken to be used in the definition of a
celestial coordinate system
. The position at other equinoxes can be computed by taking into account
precession
,
nutation
and
aberration
, which directly affect e.g.
right ascension
and
declination
.
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