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Think about Loose Coupling  Re: Locationg celestial objects
(using Astro::Coords, if need be)  by Laurent_R (Parson) on Oct
27, 2012 at 09:56 UTC ( #1001180=note: print w/ replies, xml )
Need Help??  in reply to Locationg celestial objects (using
Astro::Coords, if need be)  I don't know the Perl module you are
using, and am not able to help, but maybe I can clarify a bit on
the celestial coordinate systems.  Azimuth and elevation give
the position at a given time of a celestial object compared to
the local horizon of the place where the observer is located.
The are called horizontal coordinates. Thus it depends on where
the observer is located.  Right ascension and declination
constitute the equatorial coordinates, which do not depend on
the location of the observer, as they are measured against the
celestial equator. Declination is the angle of a celestial
object to the equator (it is sort of the latitude of the
object). Right ascension is analog