Calculation comes with a coordinate system
A planetary longitude is not complete without its date, time standard, point of view, and zodiac convention. The Western calculators normally give apparent geocentric tropical positions and label exceptions such as heliocentric or fixed-star views. Return and transit tools show UTC event times; a local civil date can differ by time zone. House and horizon calculations additionally depend on a place and a reliable birth time. Their guides explain what is withheld when that record is incomplete.
Many site calculations use the locally bundled, MIT-licensed Astronomy Engine 2.1.19. The site documents each tool’s date range, sampling and refinement method, and known limits.
Vedic rules remain separate
Vedic pages explicitly use a sidereal convention, often an approximate Lahiri ayanamsa, and they explain whether a result is based on a selected instant or the local sunrise day. Different ayanamsas, regional tables, and historical time-zone settings can change a boundary result. Some matching and dosha pages accept already known Moon, Mars, or Lagna signs rather than recalculating a birth chart. A displayed table comparison is not a marriage or life-outcome recommendation.
Historical sources have layers
For a grimoire, an autograph manuscript, a seventeenth-century edition, a Victorian translation, and a twentieth-century ceremonial arrangement can disagree. Articles identify which one supports a specific name, diagram, office, or assignment. For example, the Enochian Calls distinguish Dee’s manuscript corpus from the elemental assignments in a later printing. Goetia seals are captioned as the images of a named printed edition, not universal forms existing apart from an edition.
Historical images are used only where an item-level source and rights statement support reuse. Captions name the work and its witness, while local source registers record the file and rights claim. A public-domain underlying text does not automatically make a modern translation, introduction, or scan free to reproduce.
Interpretation has a boundary
Horoscopes, tarot readings, dreams, and ritual-history pages discuss symbolism, tradition, or reflective questions. They do not establish that a predicted event or supernatural effect will occur. Dated forecasts identify their period, and reference pages avoid presenting a historical author’s claim as a verified present-day fact. When two published conventions differ, the page should show the choice rather than silently merge them.