Two individual charts interacting
Synastry compares planet-to-planet aspects and, when both birth times are known, house overlays and angles. It can describe ease, attraction, communication, pressure, and repair themes.
LUNAR LETTER / CELESTIAL FILES
Astrology / two-person archive
Relationship astrology compares patterns without promising outcomes or claiming access to another person's private thoughts. Synastry and composite charts answer different questions and remain separate here.
Synastry compares planet-to-planet aspects and, when both birth times are known, house overlays and angles. It can describe ease, attraction, communication, pressure, and repair themes.
A composite chart uses midpoints to describe the relationship's shared pattern. It does not replace either person's natal chart and should not be presented as the same technique as synastry.
Unknown-time compatibility can still compare many planetary positions, but houses, angles, and sometimes the Moon require caution. Lunar Letter labels those limits instead of silently using noon as exact.
What supports emotional safety? Where does communication become effortful? What keeps repeating? Which differences need translation rather than blame?
See how two individual charts interact across emotion, communication, attraction, support, and friction.
Read the relationship as its own symbolic chart, separate from individual synastry.