“Synastry is the batter, The Composite chart is the cake”

A method to analyze the chemestry between two people by layering the charts on top of each other. (the signs must be in the same place) It shows the interaction, how people relate to one another, the level of attraction and challenge. However,
it’s recommended to do an individual birthchart analysis before analyzing the Synastry to see the personal needs and potential for maintaining a healthy relationship.

1) Planetary house overlays (1, 5, 7, 8, 9 = most important)
2) Planetary aspects
3) Angles in the houses & aspects
4) Conjunctions to the Axis/Angles = very strong bond
5) Important : Moon, Venus, Jupiter, Pluto, Saturn, NorthNode, Juno
6) Conjunct-aspects and how many (=can cause disharmony)
7) Aspects from Saturn/Jupiter to the rulers of the other persons houses
8) How do the rulers of the houses interact with the other person’s rulers

Important side note : A harmonious synastry isn’t necessary an indication that the relationship will last. To much trines and sextiles will create an immense amount of comfort, ease and natural cooperation. But if one or both have a more experimental and adventurous nature, than it will become boring after a while. Nonetheless, we need a healthy amount of squares and oppositions as they ignite lessons for growth. It’s good to have a certain amount of challenge and trigger as this works complementary to why we incarnate : to evolve. read more

Meaning of the houses & importance

1st House : Physical attraction and overall agreement of personality
5th House : Romantic & creative compatibility, how you have fun, self-expression
7th House : Commitment, love & partnership, cooperation, relating
8th House : Shared resources, sexual compatibility (+5th house), intimacy, trust
9th House : Long-term goals & visions, beliefs and hopes for the future

How to see…

• Sexual attraction : Venus-Mars aspects, 1st, 5th and 8th house
• Romantic sexual attraction : Eros-Cupido, aspects to the ASC or 1st house
• Marital material : Venus/ASC-Venus/Juno/Vertex/Moon, DSC
• Understanding of communication : The signs the Mercury is in + aspect
• Type of communicating : Mercury aspects to other planets
• The way you feel around eachother : Moon aspects and 4th house
• Ability to settle down : 2nd, 4th and 7th house
• Ability to last : Positive Saturn aspects (No aspects = not lasting)
• Unconditional love : Neptune, Moon, Venus, Chiron, Vertex, Amor
Sexual issues : Harsh lilith, Saturn, Mars & Venus aspects
The theme of the relationship : Most exact aspects
 Karma : Northnode, Southnode, Saturn, 12th house
Soulmate or Twinflame : Neptune, 12th house, Vertex, Nodes
Past life connections : Southnode, Saturn, 12th house
Turningpoints : Pholus in synastry

Planetary house overlays 

Sun : Highlighted area of life “The sunshine in my life”
Moon : How you feel about each other
• Venus : Where you express love & affection
Mars : How you energize each other
Mercury : How you stimulate intellect & creativity
Jupiter : Where you bring luck and expansion
Saturn : Where you restrict & learn from each other
Uranus : Where things are innovative
Neptune : How you escape from reality together
Pluto : Where you transform each other

Lilith in Synastry 

You can find more info here

Love Asteroids in Synastry 

After analyzing a synastry, it can be useful or fun to use some asteroids to see what’s hidden or what is highlighted.
You can find a list of the love Asteroids here
If you’re lucky, there are Asteroids that have your name & your lover’s, This is a more fun technique to use : Name Asteroids

Long lasting love 

• Sun/Moon midpoint in harmonious aspect to the other Sun/Moon midpoint
• Personal planets conjunct to Sun/Moon midpoint
• More harmonic aspects than hard aspects (trines and sextiles)
• Harmonic Saturn aspects to each other
• Harmonious Jupiter aspects, if the Jupiters are square, it’s likely not to last

• No/little contact of personal planets = You don’t really feel each other.
• Houses where planets fall into = The expectations the house person has
• Trine = Most positive aspect in Synastry, opportunities & similarities
• Conjunct = Merging, conflict or binding, focal energy, deepfelt
• Sextile = Harmony and ease, choice & cooperation
• Square = Creates challenge, action & passion (squares are needed)
• Opposition  = Creates attraction and can cause instability, to make or to break
• Square aspects from Saturn = Challenges the area of the aspected planet
• Harmonic Jupiter aspects = Enhances, expands, brings luck & happiness
• ASC in 6th or 12th house = Could be difficult, confusing and frustrating

Synastry aspects for good communication

• Mercury trine/sextile Mercury
• Mercury trine/sextile Venus
• Moon trine/sextile Mercury
• Moon trine/sextile Pluto
• Moon trine/sextile/conjunct Moon
• Venus trine/sextile Venus
• Pluto trine/conjunct Mercury
• Jupiter trine/sextile Mercury
• Mercury conjunct NorthNode
• Mercury conjunct IC

Synastry aspects for unconditional love

• Venus trine/sextile Chiron
• Neptune trine/sextile Chiron
• Neptune trine/sextile Venus
• Venus trine/sextile Saturn
• Venus trine/sextile Pluto
• Moon trine/sextile Pluto
• Sun conjunct Pallas
• Sun conjunct Vesta

Synastry aspects for good sex

• Mars in 5th or 8th house
• Mars conjunct to an angle
• Mars trine/sextile Moon
• Sun trine/sextile Mars
• Venus conjunct/trine/sextile Mars
• Venus conjunct/trine/sextile Pluto
• ASC conjunct/trine/sextile ASC
• Harmonious aspect between 5th & 8th ruler
• Harmonious aspect between 5th & 1st ruler
• Eros-psyche
• Eros-Venus
• Eros-Mars
• Eros-ASC
• Eros conjunct Lilith
• Amor conjunct lilith

Synastry aspects for marriage material

• Juno conjunct/trine/sextile Juno
• Southnode / NorthNode conjunct Juno
• Juno conjunct/trine/sextile POF
• Juno conjunct/trine/sextile/square Venus
• Vertex conjunct/trine/sextile Juno
• Vertex conjunct/trine ASC
• Vertext conjunct/trine Vertex
• Pof conjunct/trine POF
• Venus conjunct POF
• Moon conjunct Moon
• Moon conjunct/trine/sextile Venus
• DSC trine DSC
• DSC trine Vertex
• Cupido conjunct POF

Other good Synastry Aspects

• ASC conjunct/trine/sextile ASC
• ASC falling into partners 5th, 7th house
• 7th house lord falling into partners 5th, 7th, 8th house
• Positive Venus aspects to partners Pluto, Venus, Neptune, Sun, Moon, Saturn
• MC-ASC connections and positive aspects
• Planets in partners 4th house
• Positive aspects to 2nd and 6th house lord of partner
• Having Mercury in same sign (water, fire, earth or air sign)
• Squares to the Nodes = starcrossed lovers
• Aspects to the nodes = deep connection and bond
• Harmonic Sun-Moon aspect
• Harmonic Moon-Venus aspect
• Trines or sextiles to Chiron
• Trines or sextiles to Saturn
• Moon conjunct DSC
• 4th house ruler making a harmonious aspect to the 11th house ruler

A good synastry in my opinion

It depends on the individuals. Therefore an individual birthchart analysis is necessary to see what a person needs, how they tend to react and deal with things as well as what they lack in the birthchart in which a partner can fulfill the empty spot/energy.
The most important thing in my opinion is having harmonious Moon aspects, especially Moon-Moon. No matter how hard the relationship may be, this will act as a basis of being able to understand each other’s emotions. When Moons make a hard aspect to each other, it may cause discomfort, awkward feelings and misunderstanding between two people especially with Moon square Moon. This is a no go in love synastry. Moon opposite Moon is very challenging in a love relationship, which may act as strong attraction at first, but will result in emotional incompatibility.
Aspects from Venus are important to understand the type of love that’s shared and especially in which house she falls will show where it expressed itself.
Venus should make harmonious aspects to Mercury, Jupiter, Sun, Uranus and Saturn.
Mars in hard aspect can only be positive if it’s an opposition to Venus since this acts as strong sexual attraction. Hard aspects from Mars (square) to the ASC are a no go (depending on the birthchart of the Mars person) this may result in aggression, fights and quarrels. However Mars is where you energize each other and shows the area of action between you both. Positive aspects will act as a force within each other’s life, the way you stimulate each other such as Mars in harmonious aspect to Saturn will show stamina and great teamwork.
Stelliums that fall in the 4th, 5th or 7th house are very positive since they will act as a pleasant feeling to be around each other, to share life together.
Stelliums in 6th, 10th or 12th are considered difficult or less romantic.
Especially the 12th house can be very tricky and is deeply dependent on the individuals their birthchart. The person who has their stellium fall into the 12th house is the person that most likely unconsciously seeks healing with the house person, so this can show a strong karmic connection, however it’s the karma that makes it tricky when it comes to this type of stellium being positive or negative. It holds both the soulmate or the enemy.
Positive Saturn aspects to the personal planets of the other person act as relationship glue, and are needed if you’re looking for longterm commitment. If there are a lot of hard Saturn aspects, the relationship will become heavy and unpleasant overtime.
It’s important to consider the conjunction of Southnode (if there are any) to both planet or angle. It shows where you come from ; your pastlife together, but it also shows the possibility of the energy of the planet that’s conjunct to fade or weaken over time, such as Southnode conjunct Mercury, will show you’ve been siblings or neighbors in a pastlife, but this will result in less fun activities and communication the longer the relationship lasts. Same applies to Southnode conjunct Venus, it will ignite strong attraction at first, a feeling of knowing this person and a natural flow of love, however the love will fade overtime especially if the Venus doesn’t receive any other good aspects or when she isn’t nicely placed within the other person’s chart (such as Venus falling into 6th, 10th or 12th house)

The must have in Synastry 
• Harmonious Moon-Moon
• Harmonious Moon-Venus
• Harmonious Moon-Mercury
• Harmonious Moon-Mars
• Harmonious Moon-Saturn
• Harmonious Mars-Saturn
• Harmonious Venus-Mercury
• Harmonious ASC aspects
• Positive house overlays
• Harmonious Saturn aspects

But of course, a perfect Synastry is impossible, keep that in mind. NO relationship will be smooth without any friction or challenges, that’s completely unrealistic. However having these listed aspect in your Synastry will help.