Astronomy for Astrologers
to the body in question. R.A. is expressed in either
degrees (0° to 360°) or in Hours-Minutes-Seconds (0h
to 24h).
Declination - The angular distance of any object
measured north or south of the plane of the celestial
equator, from 0° to 90°.
Declination Circle - Parallel circles of declination, either
north or south of the plane of the celestial equator.
Parallel of Declination -- Parallel circles of declination,
either north or south of the plane of the celestial equator.
Equatorial Plane – Is the infinite extension of the
equator of the Earth, in all directions.
Meridian – Is a great circle on the celestial sphere,
which goes through the celestial poles, the zenith of any
place or locale, and the north and south points on the
horizon.
Prime Meridian - The point of zero longitude
measurement for any celestial body. In the case of the
Earth, the prime meridian is considered to be,
Greenwich, England.
Transit - The passage of a celestial object across a
particular meridian.