REFERENCE · ASTROLOGY DICTIONARY
A complete reference glossary of astrology terminology. 47 terms across astronomy, chart anatomy, planets, aspects, and timing, with technically accurate definitions.
The apparent path of the Sun across the celestial sphere over the course of a year.
An astronomical coordinate measuring the east–west position of a celestial body along the celestial equator.
An astronomical coordinate measuring the north–south position of a celestial body relative to the celestial equator.
The angle between Earth's equatorial plane and its orbital plane, currently approximately 23.44 degrees.
A continuous count of days since noon Universal Time on January 1, 4713 BCE.
A timekeeping system based on Earth's rotation relative to the distant stars rather than the Sun.
The angular offset, currently around 24 degrees, between the tropical and sidereal zodiacs.
A two-dimensional map of the sky as seen from a specific location at the exact moment of someone's birth.
The zodiac degree rising on the eastern horizon at the moment of birth, also called the rising sign.
The highest point of the ecliptic above the horizon at the moment of birth, marking the cusp of the tenth house.
The point on the ecliptic setting on the western horizon at birth, exactly opposite the ascendant.
The lowest point of the ecliptic at the moment of birth, exactly opposite the midheaven.
One of twelve segments of the natal chart that divide the sky into life-area domains.
The boundary line between two adjacent houses or zodiac signs, marked by a specific degree on the ecliptic.
The most widely used house system in modern Western astrology, dividing houses by trisecting the diurnal arc.
An ancient house system in which each zodiac sign is one full house.
A house system in which all twelve houses are exactly 30 degrees wide, beginning from the ascendant degree.
The planet that rules the rising sign of a natal chart, treated as the chief significator of the chart owner's life direction.
In astrology, a term for the Sun and the Moon — the two brightest objects in the sky.
The fast-moving bodies — the Sun, Moon, Mercury, Venus, and Mars — which describe personal traits.
The slow-moving bodies — Jupiter, Saturn, Uranus, Neptune, and Pluto — which describe broader life themes.
The Sun, Moon, Mercury, Venus, and Mars — grouped together because they describe individual personality.
Uranus, Neptune, and Pluto — the three slowest-moving outer planets, marking the cultural mood of a generation.
A grouping of three or more planets in the same zodiac sign or the same house.
A specific angular relationship between two planets in a chart, interpreted as a meaningful interaction.
An aspect formed when two planets occupy the same degree of the zodiac, fusing their meanings.
An aspect formed when two planets are 180 degrees apart, creating a direct face-off.
A 120-degree aspect between two planets, traditionally considered the most harmonious relationship.
A 90-degree aspect between two planets, tense and challenging but a source of developmental growth.
A 60-degree aspect between two planets, considered mildly supportive and opportunity-bearing.
The margin of allowable variance from an exact aspect angle within which two planets are still in aspect.
The distinction between aspects moving toward exact (applying) versus those moving apart (separating).
The current real-time motion of a planet across the sky, and the aspects it forms with the natal chart.
A period during which a planet appears to move backward through the zodiac from Earth's perspective.
The normal forward movement of a planet through the zodiac, as opposed to its retrograde periods.
The brief period when a planet shifts between direct and retrograde motion, appearing nearly motionless.
The moment when a planet crosses from one zodiac sign into the next, marking a qualitative shift.
A complete lunar cycle from one new moon to the next, approximately 29.5 days.
The astrological event in which transiting Saturn returns to its natal position, around ages 28–30.
The two points where the Moon's orbit crosses the ecliptic, treated as karmic life-direction indicators.
A period during which the Moon makes no further major aspects before leaving its current sign.
A four-fold classification of the zodiac signs into fire, earth, air, and water.
A three-fold classification of the zodiac signs by their mode of action: cardinal, fixed, and mutable.
A condition in which a planet's declination exceeds the Sun's maximum of approximately 23.4 degrees.
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