Word origin · etymology
Greek through Late Latin.
Greek syn- means together and astr- refers to stars; synastria became the term for comparing two people's stellar configurations.
How we know · epistemology
Cross-chart comparison
Two independently established charts supply the compared positions. Orbs and interpretive rules determine the reading; a match cannot establish attraction, consent, fidelity or another person’s private feelings.
John Green and Chris Brennan: Synastry — The Astrology of Relationships ↗
Connected concepts
Terms used in this explanation
Mentioned in 1 other entry
These links connect subjects and terminology. They do not establish a shared historical origin.
Sources & provenance
Use the citations beside each section to distinguish a calculation convention, a historical teaching and an editorial example.