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Moon phase and sign

Where the Moon is right now, by phase and by zodiac sign, computed in your browser from the standard astronomical series rather than looked up in a table. Pick any date to see the same for it.

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What this tool does not do

This is astronomy, and it is checkable. The phase and the Moon's position are computed from the standard periodic series, and against published new and full moon times the calculation lands within about two minutes. Nothing on this page is a prediction.

One honest caveat about the sign. The Moon crosses a sign boundary roughly every two and a half days and moves about half a degree an hour, so within a few minutes either side of a boundary the answer here and the answer from a full ephemeris can differ. If your question turns on that, use an ephemeris that reports seconds.

Questions people ask

How accurate is this?

The phase and the Moon's longitude come from the standard truncated periodic series. Checked against published new and full moon times through 2024, the calculation lands within about two minutes of clock time. That is far more precision than a sign or a phase name needs.

Why does another site give a different sign?

Almost always because you are near a boundary. The Moon crosses from one sign into the next roughly every two and a half days, and it covers about half a degree an hour, so within a few minutes either side the answer depends on the precision of the ephemeris. Away from a boundary the two will agree.

Is this the tropical or the sidereal zodiac?

Tropical, which is the default in Western astrology: the signs are measured from the equinox rather than from the constellations. Sidereal positions currently run about twenty-four degrees behind, which is often almost a whole sign.

Does the Moon affect behaviour?

Not in the way the folklore says. The tidal effect of the Moon on a human body is vanishingly small, and the large studies looking for lunar effects on hospital admissions, births and crime have not found one that survives scrutiny. What is better supported is that a bright full moon disrupts sleep, which is a mundane explanation for a good deal of the folklore.

What does the age of the Moon mean?

Days since the last new moon, out of a cycle averaging 29.53 days. It is a way of naming where in the cycle you are without rounding to one of the eight phase names.

Why is the lit side sometimes on the left?

Because a waxing moon is lit on the side facing the Sun as it trails behind it, and a waning moon is lit on the other. The illustration follows the northern-hemisphere view; from the southern hemisphere it appears mirrored.