Reference
Synastry aspects
Synastry compares two people's birth charts, and a contact is a planet in one chart at an angle to a planet in the other. These are what the older sources hold the main contacts to mean, pair by pair, each traced to a work and a page you can open for free. Where there is a longer piece on a single aspect, it is linked below its reading.
Sun and Moon
Conjunction
Who one of you is and how the other feels line up exactly: the strongest kind of sympathy two people can share.
- Zadkiel (R. J. Morrison), The Hand-book of Astrology (London, 1861), s.v. "Sympathy", p. 109 read it
Trine or sextile
Your two natures sit in easy accord: a natural sympathy that friendship tends to follow.
- Alan Leo, How to Judge a Nativity (1912; pages from the 1928 printing), p. 221 read it
- "Raphael" (R. T. Cross), The Guide to Astrology (London: Foulsham, 1905), p. 96 read it
- Ptolemy, Tetrabiblos, trans. J. M. Ashmand (London: Davis and Dickson, 1822), I.16, p. 38 read it
- Ptolemy, Tetrabiblos, trans. J. M. Ashmand (London: Davis and Dickson, 1822), IV.7 "Friends and Enemies", pp. 192–193 read it
- Vivian E. Robson, A Students' Text-Book of Astrology (London: Cecil Palmer, 1922), p. 140 read it
Square or opposition
Who you are and how you feel pull in different directions between you, so disagreements come easily.
- "Raphael" (R. T. Cross), The Guide to Astrology (London: Foulsham, 1905), p. 96 read it
Sun and Venus
Conjunction
Who one of you is meets what the other enjoys: the makings of a happy, pleasurable friendship.
- Alan Leo, How to Judge a Nativity (1912; pages from the 1928 printing), p. 222 read it
Moon and Venus
Conjunction
How one of you feels meets what the other enjoys: a match that tends to make a friendship more lasting.
- Alan Leo, How to Judge a Nativity (1912; pages from the 1928 printing), p. 222 read it
How to read these
The older sources speak of contacts in families: a conjunction; a trine or sextile; a square or opposition. They do not tell a trine from a sextile, or a square from an opposition, so each reading here covers the whole family. Where a longer piece draws that distinction, it says so and says that the distinction is this site's reading.
A contact has a direction, one person's planet to the other's, but these readings are written for both people, and for any two people: friends, family and colleagues as much as partners. None of it is a verdict. One contact never describes a whole relationship, and astrology is a tradition of interpretation rather than a body of established fact.
Which of these you two have
The synastry page draws both charts on one wheel and lists every contact between them, from each person's date, time and place of birth. Nothing is transmitted; it is calculated on your own device.