
No magic out of thin air. Behind every Calestea feature: real ephemerides, geocentric tropical coordinates, classical rules, and transparent math. Here is exactly how.
Everything starts with your birth chart. From your date, time, and place we compute the positions of the luminaries and planets along the ecliptic — in the geocentric tropical system, the Western zodiac of 12 signs measured from 0° Aries.
We compute the Sun, Moon, Mercury, Venus, Mars, Jupiter, Saturn, Uranus, Neptune, Pluto, plus the Lunar Nodes (Rahu and Ketu), Chiron, and the Black Moon (Lilith). If your exact birth time is known, we add the angles: the Ascendant, Midheaven (MC), and houses.
Between the points we find aspects — conjunctions, sextiles, squares, trines, oppositions — with accepted orbs (up to 8° for the majors). Without a birth time we do not show houses or the Ascendant, and we say so plainly: better to stay silent than to invent.
Every day the sky moves. The transit engine computes the current geocentric positions of the planets locally, on an astronomical ephemeris core, and lays them over your natal chart.
We keep only tight aspects — a 2° orb for conjunction, square, trine, and opposition, and 1° for the sextile — so it never ends up that "everything aspects everything." We distinguish applying from separating aspects, retrograde planets, stations, the Moon’s phase and illumination, and the void-of-course Moon (with Lilly’s classical sign exceptions).
These same transits feed the daily brief, "Check for me," and the lucky-days math — one honest engine across all features.
The Cosmic brief is your transits for today in plain language: what is lit up and how to live it. We lead with the fastest active aspect (Moon, Sun, Mercury, Venus, Mars); slow planets are background, not "today."
"Check for me" works on yours and theirs alike: describe your own day or situation — or paste any horoscope from the web — and we compare it against your real transits, telling you what lands on you and what misses.
The text is written by AI — but strictly from the list of real aspects in your chart, with an explicit ban on inventing anything that isn’t in the data. We compute; it phrases.
Horary astrology answers a concrete question from a chart cast for the moment the question is asked, at the querent’s location. Houses use the Regiomontanus system — the traditional choice for horary.
We map the question to the right house (marriage — VII, work — X, money — II, and so on), assign the significators of the querent and the matter, read their condition, the Moon’s applying aspects, perfection, and check whether the Moon is void of course.
The verdict — yes / no / unclear — is phrased in the manner of William Lilly and John Frawley from the real chart of the moment. The full paid reading goes deeper: dignity of the significators, translation and collection of light, timing.
Electional astrology finds the best time for a thing. For each candidate day we compute the sky and score the transits to your chart by a formula: aspect harmony × tightness × planet speed × relevance to the goal.
We account for the nature of the planets (Jupiter and Venus are benefics, Saturn and Mars malefics) and their essential dignities (domicile, exaltation, detriment, fall). We subtract points for a void-of-course Moon, combustion, the New and Full Moon, proximity to eclipses, and retrograde motion of a planet relevant to the goal.
"Lucky days" takes a ready-made theme (love, money, a talk, career, travel, a launch, luck); "Best moment" takes your free-form question. Each day gets a score out of 100 and a dashboard: energy, luck, creativity, smoothness.
Your Natal Portrait is an archetype and a portrait born from your chart. The element comes from your Sun sign (fire, earth, air, water) and the modality from your Ascendant sign (cardinal, fixed, mutable). Their intersection yields one of 12 archetypes.
Separately we compute your chart ruler — the strongest of the seven traditional planets by essential and accidental dignity (domicile, exaltation, an angular house, speed).
The archetype and your key placements go to AI portrait generation. Your face stays yours — only the æsthetic the stars draw you in changes.
Compatibility is synastry: we overlay two natal charts and compute the inter-aspects between all the planets of both people plus each person’s Ascendant and MC. We compute it locally from your charts — no "compatibility percentage" pulled from thin air.
Each aspect contributes by a weight table, and the more so the tighter the orb. From them we build honest sub-scores: love, friendship, communication, and conflict — and an overall, where conflict counts against you.
Behind "communication" is the real Mercury-to-Mercury axis; behind "love," the ties of Venus, Mars, Moon, and Sun. No labels out of place: every score rests on concrete planetary contacts.
The series of past-incarnation portraits is built from your chart through 13 layers of different schools — Vedic, Hellenistic, evolutionary. The core is the South Node (Ketu): its sign, house, and decan, plus its nakshatra and pada (the Vedic division of the zodiac into 27 segments).
We add Pluto (Jeff Green’s evolutionary astrology), Saturn, Chiron, Lilith, the 12th house, the Atmakaraka, the prenatal lunar and solar scenarios, and other points — each gives its own "layer" of memory.
First, deterministic rules turn chart placements into themes; then AI writes the stories from them and an AI artist paints the portraits. Honestly: this is a syncretic, exploratory technique — food for the imagination, not a proven fact.
Positions of the luminaries, aspects, and orbs we compute for real: genuine ephemerides, geocentric tropical coordinates, classical rules. Here we are not approximate.
The interpretation — where the technique meets your life — is written by AI, relying only on the real numbers of your chart. We forbid it from inventing aspects, and without a birth time, from speaking about houses and the Ascendant.
Calestea is for self-reflection and inspiration — not medical, legal, or financial advice, and not a prediction of fate.