great circle A circle described on the surface of a sphere (Earth, for example) so that its plane passes through the center of the sphere.
Great circles, or parts thereof, are otherwise rarely used within the method, so it cannot be described in terms of spherical trigonometry. The following definition and remarks are offered in its place: ...
meridian : A great circle, encircling Earth, that passes through the North and South Poles. A line of longitude.
Starting with great circles at the meridian and ante-meridian, the horizon and the prime vertical, add other great circles from Zenith to Nadir which trisect each quadrant of the horizon.
Meridian: A great circle or imaginary line on the celestial sphere that passes through the northern horizon and southern zenith directly above the observer
Midheaven: The doorway into the tenth house in an astrological chart.
In this system, the great circles intersect the celestial equator at equal distances of 300. They intersect the, ecliptic at points considered as the cusps of the houses.
MeridienA great circle projected onto the celestial sphere, which encompasses the north and south points on the horizon and the zenith, which is directly above the observer.
great circle: a circle on the surface of a sphere which divides the sphere into two equal parts. small circle: any circle on the surface of a sphere which is not a great circle. celestial sphere: a model of the sky as a spherical shell.
The planes of their orbits make great circles on the Celestial Sphere as does the plane of the Earth's orbit. Where these two great planes intersect one another are planetary nodes or interface points for this particular planetary pair.
Placidus Instead of using great circles, the diurnal motion of the Earth causes a celestial object to intersect the cusp of the 12th House, after a sidereal-time interval equal to one-third of its semi-diurnal arc; ...
The celestial equator is a great circle of the celestial sphere marked out by indefinite extension of the plane of terrestrial equator.
With Venus in Aquarius you're universal in your love of others, and collect a great circle of friends and acquaintances from all walks and strata of life.
Since the Earth is tilted approximately 23°27', the Sun's path marks a great circle around the Earth called the ecliptic. (In truth, the Earth turns and views the Sun from an angle).
Midheaven: This is the great circle which extends out from the Zenith downward toward the equator, which crosses at right angles.
Aspect: The angular separation between two bodies, measured along a great circle, is termed Aspect.
A recently published (1995) house system, based on a great circle passing through the ascendant and zenith.
Prime vertical - The vertical East-West great circle, whose plane is perpendicular to the plane of the meridian, and which passes through the East Point, Zenith, West Point, and Nadir of a particular location.
Prime Vertical: The great circle that rises vertically from the east point of the horizon and passes through Earth's zenith and nadir.
Nadir: The point on any given observer's celestial sphere diametrically opposite of one's zenith.
terrestrial: 0° latitude, an imaginary great circle around the planet which is perpendicular to the poles of Earth's rotation; 2. celestial: Earth's equator projected out into space, used largely by astronomers, inclined at 23° from the ecliptic.
The Zodiac belt is the great circle around which our luminescent Sun apparently moves month by month throughout the year, transceiving the energy of those different constellational signs and thereby transmitting the celestial radiations to our Earth.
The male and female sides are divided by the Equinoctial Colure, which is a great circle passing through both the north and south celestial poles and the equinoxes.
Zodiac, Astronomical Constellations " groupings of stars that form a rough circle. Observable in an arc across the southern sky, beyond the invisible Great Circle that we call the ecliptic.
Ronald Davison calculates the place for the Relationship Chart by taking the average of the Latitudes and Longitudes, while I believe it is more logical to take the midpoint of the great circle joining the two birth places.
different from different places on earth depending on geographical location. Cicero and Empiricus (23) advance similar arguments against the validity of astrology (most defective and still carried forth today). Cicero argued that the great circles ...
 See also: Earth, Astrology, House, Planet, Zodiac
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