What each ring shows
The inner ring is the natal sky calculated for the birth moment after converting the entered local clock time with the historical UTC offset. The middle ring is a secondary progression: for each 365.24219 days lived, the ephemeris advances one day after birth. It displays the progressed Sun, Moon, Mercury, Venus, and Mars at that symbolic ephemeris moment. The outer ring is the actual planetary sky at the chosen comparison time in UTC. All longitudes are apparent geocentric positions in the tropical zodiac. The wheel fixes 0° Aries at its left edge.
This chart deliberately keeps the progressed and transiting positions in separate rings. The independent version here shows all ten transiting planets and the five progressed inner planets, so the two kinds of movement are easy to distinguish. A progressed Moon is a symbolic position for the selected life date; a transiting Moon is where the Moon is in the sky at the selected moment.
How the aspect lists are filtered
Each table compares a moving longitude with a natal longitude by the shortest distance around the 360° circle. It reports conjunction, sextile, square, trine, and opposition. Progressed-to-natal contacts use a one-degree orb. Transit-to-natal contacts use a two-degree orb. A contact appears only when the measured distance lies within that filter. These are geometric selections, not event predictions. The result lists the closest matches first; if none qualify, the page says so.
Record and method limits
This combined view leaves out Ascendant, Midheaven, and houses. Those would need a chosen birth location and additional, sometimes competing, progressed-angle conventions. Birth time still matters: it sets the natal moment and the starting point for the day-for-a-year calculation, especially for the Moon. A missing or approximate birth time should not be replaced with an unexplained noon chart. Historical time-zone rules also matter; an offset copied from the birthplace today can be wrong on the birth date. Check the birthplace atlas and the original record before comparing exact contacts.
The source chart engine rounds the symbolic ephemeris moment to the nearest minute and supports dates from 1800 to 2100. The selected UTC date and time are used for both the transit positions and the day-for-a-year mapping. An hour near a progressed Moon sign boundary can change the displayed progressed degree. This page does not claim that symbolic progression positions occupy the physical sky on the comparison date. Astrological meanings assigned to these coordinates depend on tradition and interpretation.