Moon Signs

Libra Sun Aries Moon: A Full Moon Birth

Libra Sun aims to be fair, and to make things work between people; Aries Moon needs to act on a feeling immediately, and to not be managed. The two signs are opposite each other, which is what decides whether those two agree, and it also tells you the lunar phase you were born under.

Chart wheel showing the Sun in Libra and the Moon in Aries, a full moon birth, an opposition
Libra Sun, Aries Moon: a full moon birth, an opposition.
The short answerLibra Sun with Aries Moon means you are aiming to be fair, and to make things work between people, while needing to act on a feeling immediately, and to not be managed. The two signs are opposite each other, a full moon birth, an opposition, so the aim and the need pull against each other. It also means you were born at or near a full moon.

Libra Sun: what you are trying to become

The Sun is the aim. Not what you are like, which is a different question, but what you are consciously oriented toward and what you would be proud of being. With the Sun in Libra that is to be fair, and to make things work between people.

What Libra quietly takes pride in is decency. At its best this placement becomes somebody other people trust to hold the middle. Libra is Air and Cardinal, ruled by Venus, and the recognised weak spot is that it keeps the peace at its own expense.

Aries Moon: what you need

The Moon is the private half, and it is usually the placement people recognise most sharply once it is described. It covers what you need in order to feel alright and what you do before you have thought about it. With the Moon in Aries you need to act on a feeling immediately, and to not be managed.

What settles you: movement, and being allowed to be annoyed without a conversation about it. And the giveaway, the thing people close to you would recognise: goes from fine to furious with nothing in between, and is over it an hour later. Aries is Fire and Cardinal, ruled by Mars.

What happens when you put the two together

Libra and Aries are opposite each other, which is a full moon birth, an opposition. Born at a full moon, with the Sun and Moon facing each other across the chart. What you want and what you need are opposites, and the usual report is a life spent working the tension out through other people.

Air and Fire are different elements, which is the part that actually produces the mismatch people notice: you are aiming with one kind of energy and recovering with another.

Libra Sun and Aries Moon side by side
Libra SunAries Moon
What it coversWhat you are aiming atWhat you need privately
Element and modeAir, CardinalFire, Cardinal
Ruled byVenusMars
In one lineTo be fair, and to make things work between peopleTo act on a feeling immediately, and to not be managed
Who sees itYou, and anybody who asks what you wantPeople who live with you

The practical version

Because the two disagree, you will recognise this: the thing you are working toward keeps costing you the thing you need. To be fair, and to make things work between people does not sit comfortably with needing to act on a feeling immediately, and to not be managed, and most people with this combination have arranged their life around the tension without ever naming it.

The useful move is not to pick a side. It is to notice which one you default to when you are tired, because that is almost always the Moon, and to notice what you have been postponing, because that is almost always the Sun.

The phase you were born under

There is a second thing these two placements tell you, and almost nobody mentions it. The distance from the Sun to the Moon, counted forwards, is the lunar phase you were born under. Aries is 6 signs ahead of Libra, which puts you in the full moon band.

That is a band rather than a verdict: the exact phase needs the degrees, not just the signs, so somebody at the edge of a sign could land either side of it. What a full moon birth is read as is here, along with the arithmetic to check your own properly.

What this page is missing

Your rising sign, which is what people meet first and which needs a birth time. On any given day, twelve different people share this Sun and Moon and have twelve different rising signs, and they do not come across remotely alike.

If you do not know your birth time, this covers how to find it, including which record to ask your state for. And the Big Three together are covered here.

Two placements out of about fortyThe Sun and Moon are the two biggest things in a chart and they are still two things. The rising sign, which needs a birth time, is what people meet first and is missing from everything on this page. So is every house, every aspect to anything else, and the whole of Mercury through Pluto. A Sun and Moon reading is a sketch, and a sketch that fits is not evidence of anything beyond the sketch being well drawn.

The Sun in Libra in full and the Moon in Aries in full. Sun opposition Moon covers the aspect itself, for anybody whose Sun and Moon are close enough in degree for it to count properly.

Questions people ask

What does Libra Sun Aries Moon mean?

You aim to be fair, and to make things work between people while needing to act on a feeling immediately, and to not be managed. The two signs are opposite each other, so those pull against each other.

Is Libra Sun Aries Moon a good combination?

It is a demanding one, and that is not the same as bad. The friction is what forces people with this combination to examine themselves, which most comfortable combinations never have to.

Do I need my birth time for this?

Not for the Sun. For the Moon, often yes: the Moon changes sign every two and a half days, so anybody born on a day it moved needs a time to be sure.

What lunar phase was I born under?

Aries is 6 ahead of Libra, which puts you in the full moon band. The exact phase needs degrees rather than signs.

RubyAstro writes about astrology for reflection and self-understanding. Nothing here is medical, legal or financial advice, and none of it is a prediction of events. Read our full disclaimer.