Question 1

What exactly is synastry, and how is it different from sun-sign compatibility?

Accepted Answer

Synastry is the technique of comparing two complete natal charts to see how each person's planets, ascendant, and houses interact with the other's. Sun-sign compatibility only looks at one factor, your Sun sign, while synastry weighs dozens of points across both charts. Think of sun-sign matching as reading a headline, and synastry as reading the whole article. It gives you a far richer, more honest picture of how two people actually connect.

Question 2

Is sun-sign compatibility like 'Leo and Scorpio work' actually reliable?

Accepted Answer

Not on its own. Reducing two people to a single Sun sign ignores their Moon, Venus, Mars, ascendant, and the aspects between their charts, which is where most of the real relationship texture lives. Two Leos can feel like strangers while a 'mismatched' pair feels instantly at home, because emotional needs (Moon) and how each person loves (Venus) often matter more than the Sun. Treat sun-sign rules as a fun starting point, not a verdict.

Question 3

Which planets matter most when looking at love compatibility?

Accepted Answer

For romantic connection, the four most telling points are the Sun (core identity), the Moon (emotional needs and comfort), Venus (how you give and receive affection), and Mars (desire, drive, and how conflict shows up). When these planets form supportive aspects between two natal charts, partners tend to feel naturally understood. Astrollo calculates these positions with Swiss Ephemeris at fraction-of-a-degree precision, so the comparison reflects the real sky at each birth moment.

Question 4

Can two 'incompatible' signs still build a good relationship?

Accepted Answer

Yes, easily. A chart describes tendencies and dynamics, not a fixed destiny, so no pairing is doomed or guaranteed. So-called difficult aspects often point to areas that simply ask for more awareness, communication, and effort, and many lasting relationships are built precisely on that conscious work. Your free will and the daily choices you both make shape the relationship far more than any single placement.

Question 5

What information do I need from both people to run a synastry chart?

Accepted Answer

For each person you need the date, exact time, and city of birth. The birth time matters most, because it sets the ascendant and the houses, and even a difference of a few minutes can shift how the two charts overlay. If one birth time is unknown, you can still compare planetary positions, though the house-based and ascendant insights will be less precise.

Question 6

Does synastry tell me whether my relationship will last?

Accepted Answer

No, and it is healthier to think of it that way. Synastry maps the dynamics between two people, where you flow easily and where you may need patience, but it does not deliver a yes-or-no prediction about the future. Use it as a mirror for reflection and better conversations, not as a final answer; whether a relationship lasts depends on the choices, care, and growth you both bring to it.

Compatibility and synastry: frequently asked questions