Mars Synastry: 12th House Overlay in Astrology

What is Synastry?

Synastry is an astrological technique used to compare the natal charts of two or more people to determine their compatibility based on planetary interactions between the charts.

Mars Synastry Overview

Mars energy is assertive, aggressive, active, challenging, and energizing influence to your 12th house.

Action
Physical attraction
Energy level

Aggression
Anger
Stress

Assertiveness
Drive
Willpower

12th House Synastry Overview

The 12th house is about secrets, fears, the subconscious, criminal activity, spirituality, ghosts, dreams, meditation, retreat, solitude, imprisonment, museums, hospitals, institutions, merging, imagination, the intangible, and that part of you that you can’t see well, and can be the self-undoing, or create situations of self-sabotage.

Blind spot
Self-sabotage
Fears and phobias

Institutions
Rest, retreat, and alone time
Supernatural

Secret enemies
Surrender
Untamed wilderness

Mars 12th House Synastry Example

BradandJenMars12thSynastry — Jennifer Aniston's Mars falls in Brad Pitt's 12th house

Someone's Mars falls in your 12th house

When someone’s Mars falls in your 12th house you may feel that you have nowhere to hide. These people actively engage the parts of you that you’d rather ignore or that you didn’t realize existed. How well you respond to someone whose Mars falls in your 12th house depends on how open you are to facing your fears and clearing out your psychic junk. Maybe you don’t want your 12th house activated. Maybe you don’t want to remember your dreams. Maybe you don’t want someone pointing out your bad habits.

Positive

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Negative

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Your Mars falls in someone's 12th house

When your Mars falls in someone’s 12th house you are the one poking into the other person’s secrets. You are the one being aggressive and nudging them towards something unknown. You may be the initiator in the relationship.

Positive

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Negative

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Family Relationships

The relative who has your back, or the relative who stabs you in the back. The person who accepts you and with whom you can be yourself. The relative who makes you uneasy. Unspoken sexual tension that disturbs your sleep. The uncle who stares too much. The family members who encourage your bad habits and sabotage your progress.

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Work Relationships

Sexual undercurrents in relationships with coworkers or supervisors. Affairs in the workplace. Flirting on cigarette breaks. Sexual excitement discussing favorite TV shows and such. The office romance that doesn’t go anywhere. There’s no chemistry outside of the secret shared moments.

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Romantic Relationships

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Friendships

Your best friend who lifts you up when you are down. The person you trust your secrets to. “I’ve never told anyone this before!” Your best friend keeps you apart from the rest of his friends. You feel ashamed of this friend for some reason. Your friend’s faults make you feel uncomfortable. Your friend encourages your bad habits.

If you are the Mars person

If you are the Mars person, you will have to learn when to back off and allow the 12th house person privacy and solitude. Not all secrets need to be shared. You will learn to relax a little. Be wary of the selfish motivations behind your actions and the impact they may have on the 12th house person.

If you are the 12th house person

If you are the 12th house person you will have to actively notice and acknowledge the Mars person’s efforts. You will need to make a conscious effort to make this person feel sexually attractive (if it is a sexual relationship). You will have to be willing to confront your bad habits and deal with them.