Library Synastry

Their Mercury in your 3rd house

You finish each other's texts

In synastry, you place one person's planets into the other person's houses. When someone's Mercury, how you think, falls in your 3rd house, Voice, that part of them shows up in the part of your life about communication, siblings, learning, neighbourhood.

What it's like

Reply speed, in-jokes, a thread that never quite ends. This is Mercury at home, so you two probably never run out of things to say to this person.

The good

Chatting with them is easy and endless

The tension

Constant contact can turn into noise

It depends who they are

The same placement plays out differently with a partner, an ex or your mum.

If they're your partner

You finish each other's texts

Texts fly back and forth all day, with jokes only the two of you understand. The fun of it can mask the days you stop saying anything that matters.

If they're a crush

They fill up your phone

This is the chatter house, so this person lands right in your texts. Expect quick banter and plenty of reading between the lines.

If they're an ex

They were your best conversation

This person matched your pace of talking, joking and swapping links. Few people have followed your train of thought like that, which is partly why it lingers.

If they're a friend

You two never run out of chat

Messages, memes, voice notes at 11pm. This person matches your pace, and conversation with them feels easy, quick and slightly addictive.

If they're family

They are the ones you talk to

This person swaps stories, jokes and gossip with you in a way few others do. Group chats and voice notes keep the line open.

The other way round: Your Mercury in their 3rd house

You are made for chatting

Messages with you go back and forth all day. Your Mercury in this person's 3rd matches their curiosity, with quick replies, links and tangents.

About Mercury

Mercury is your mind in motion: how you take things in, talk, text, plan and argue. It's also the planet of errands, emails and that list on the back of an envelope.

About the 3rd house, Voice

The 3rd house is your everyday mind and mouth: chats, texts, short trips, siblings and the streets you walk every day. It's how you learn, and who you gossip with while you do.

See where someone lands in your houses.

Add them to Orbit in the Houses app and it shows every one of their planets in your chart, and yours in theirs.

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