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Astral Atlas
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Astrology wiki

Explore wiki concepts, word origins, evidence and their connections to traditions and tools.

Meaning, evidence and context

Concepts A–Z

512 concepts, each with a definition, word origins, a brief epistemology and source links. Hover or focus a dotted term to preview it. Tap once for the preview, then follow the entry.

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Subject

9 terms

A
Derived charts & points

Antiscia →

Also: antiscion

Mirror positions across the Cancer–Capricorn solstitial axis; in tropical longitude, the reflection is 180° minus the original longitude.

Word origin, evidence & sources
Word origin · etymology
Greek technical borrowing.

Plural of antiscion, from anti-, opposite, and skia, shadow. The name describes the pairing of opposite or corresponding shadows.

How we know · epistemology
Geometric reflection with traditional use

Reflection uses the tropical solstitial axis. A sidereal display must convert that same axis correctly; interpreting mirrored points as connected affairs is a historical rule, not a physical interaction.

C
Derived charts & points

Composite chart →

Also: midpoint composite

A relationship chart built from corresponding planetary and angular midpoints of two charts, rather than a real birth instant.

Word origin, evidence & sources
Word origin · etymology
Latin-derived adjective.

Composite comes from compositus, put together. The name describes a chart assembled from the midpoint positions of two charts.

How we know · epistemology
Constructed relationship model

Corresponding natal positions are combined by midpoint rules. The result can be reproduced without describing a physically possible sky; its relationship narrative is a further interpretive model.

Derived charts & points

Contra-antiscia →

Also: contra-antiscion

Points opposite the antiscia; a distinct geometric relationship whose interpretive use varies.

Word origin, evidence & sources
Word origin · etymology
Latin prefix attached to a Greek-derived term.

Contra- means opposite; antiscia derives from opposite-shadow terminology. This compound names the points opposite the antiscia.

How we know · epistemology
Geometric reflection with traditional use

These positions are constructed opposite the antiscia. The geometric operation is checkable, while any opposition-like testimony depends on the practitioner’s rules and chosen orb.

D
Derived charts & points

Draconic chart →

Also: draconic zodiac

A chart rotating longitudes so the chosen north lunar node becomes 0° Aries; soul-related readings are interpretive claims.

Word origin, evidence & sources
Word origin · etymology
Latin and Greek dragon terminology.

Draconic derives from draco, dragon. Its chart use recalls the lunar nodes' traditional names, the dragon's head and tail.

How we know · epistemology
Node-based coordinate transformation

Rotating positions to a selected node origin is a reproducible operation. Describing the resulting chart as a soul or past-life map adds spiritual claims that the rotation cannot verify.

H
Derived charts & points

Harmonic chart →

Also: harmonics · harmonic factor

A derived longitude display: multiply each selected ecliptic longitude by an integer h and reduce it modulo 360°. A conjunction in that display corresponds to an angular relation near k/h of a circle; its reduced order must be checked before attaching a factor-specific teaching.

Word origin, evidence & sources
Word origin · etymology
Mathematical and musical vocabulary borrowed into modern astrology.

Harmonic derives through harmony from Greek harmonia, joining or agreement. In chart practice the name points to integer proportional divisions of the circle; it does not identify a measured acoustic or electromagnetic frequency.

How we know · epistemology
Reproducible angular transformation plus school-specific interpretation

Integer multiplication and circular reduction are arithmetic. An interpretation requires a named school. The study themes offered here concern prominent multi-planet patterns; a qualifying pair alone does not establish the study’s pattern selection, a personality trait or a forecast.

History, methods & personal reading →

L
Derived charts & points

Lot of Fortune →

Also: Part of Fortune · Fortune

An angular point combining Ascendant, Sun and Moon. Common traditional formulas reverse the Sun–Moon order for night births.

Word origin, evidence & sources
Word origin · etymology
Traditional translated name.

Lot means an allotted portion or a share; Fortune names the associated traditional topic. It is not the name of a physical body.

How we know · epistemology
Traditional angular formula

The point comes from a specified Ascendant–Sun–Moon formula and day/night rule. Different conventions can yield different positions; its name is not evidence of wealth, luck or a promised outcome.

Derived charts & points

Lot of Spirit →

Also: Part of Spirit

A traditional Ascendant–Sun–Moon combination complementary to Fortune under commonly used day/night formulas.

Word origin, evidence & sources
Word origin · etymology
Traditional translated name.

Lot retains the sense of an allotted portion; Spirit supplies this lot's conventional topic. The wording describes symbolic assignment.

How we know · epistemology
Traditional angular formula

Spirit is calculated through a named formula, often complementary to Fortune. Its association with intention or action is historical interpretation, not a measured mental or spiritual property.

M
Derived charts & points

Midpoint →

One of two opposite angular halfway points between two zodiac positions; the chosen branch must be recorded.

Word origin, evidence & sources
Word origin · etymology
Transparent English compound.

Mid- means middle; point marks the location halfway between two positions. The astrological use keeps this geometric meaning.

How we know · epistemology
Circular geometry

Circular arithmetic yields opposite midpoint branches, with no preferred near branch for exactly antipodal inputs. Selecting a branch or treating it as significant is a declared convention, not a newly observed body.

V
Derived charts & points

Vertex →

A western intersection of the ecliptic and prime vertical, a local reference circle; it is a calculated point, not a body.

Word origin, evidence & sources
Word origin · etymology
Latin borrowing.

Vertex meant a turning point, crown of the head, or summit, from vertere, to turn; astrology applies it to a particular intersection.

How we know · epistemology
Local spherical geometry

The ecliptic–prime-vertical intersection can be calculated for a place and instant. Treating a contact to it as a destined encounter is an interpretive claim, not a property measured by the geometry.