Synastry: How to Compare Two Charts to Understand Real Compatibility
By the ERA editors/25 Mar 2026/2 min read
Compatibility is not about sun signs. It is about how two complete charts interact.
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What synastry is and how it works
Synastry overlays two natal charts and analyzes the interactions. If your Venus falls in your partner's 7th house, your presence directly activates their relationship area - they feel naturally drawn to you. If your Saturn squares the other person's Sun, there is tension between your structure and their identity - it can be a challenge that generates growth or frustration depending on both people's maturity.
The aspects between planets of two people are the heart of synastry. Conjunctions create fusion. Trines create flow. Squares create productive friction. Oppositions create polarized attraction. There are no "bad" aspects in synastry - only aspects that require more awareness.
Serious synastry does not limit itself to saying "compatible" or "incompatible." It shows exactly where the relationship flows, where there is friction, and what needs conscious work.
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What ERA does differently in synastry
Most compatibility apps compare sun signs and give you a percentage. That is not synastry - it is a game. ERA compares the complete charts of two people: all planets, all houses, all aspects.
But ERA goes a step further. It analyzes how both people's progressed charts interact at this moment. Because a couple that was highly compatible five years ago may be experiencing a different phase now - if one person's progressed Moon changed signs and no longer aspects the other's Venus, the emotional dynamic has changed.
ERA shows you compatibility as it is now, not as it was at birth. That is real synastry - dynamic, precise, and anchored in the present.
ERA does synastry with complete and progressed charts. It shows you current compatibility, not a percentage based on sun signs.
Sun ingress, Scorpio 0
The moment the Sun crosses into Scorpio sets the tone for the whole month.
From ERA, on Scorpio season, for you specifically
General advice is fine. Your chart says where it actually lands.
General Scorpio season advice is fine. But the season touches your chart through whichever house Scorpio rules for you, and that is where the real work is. For a Leo rising, this lands in the fourth house, home and roots.
The headline says intensity. Your chart says where to point it.