Planets in the natal chart

A birth chart holds ten planets - Sun, Moon, Mercury, Venus, Mars, Jupiter, Saturn, Uranus, Neptune and Pluto - and each one is in charge of a different department of a life. They read as a three-word chain: the planet says what (love, mind, drive), the sign says how, the house says where it happens. Astronomers stopped counting Pluto as a planet in 2006; astrology kept it, and this page says so rather than pretending the argument does not exist. The calculator below finds all ten in your own chart from real ephemerides, by date, time and city.

“Saturn in Capricorn, 8th house” is three technical terms in a row, and knowing all three still does not tell you what it is like to be that person. Luna says it in ordinary English, out loud.

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What each planet is in charge of

  1. ☉
    Sun

    The Sun in a birth chart is the part of a person that does not change with the company they are in: what they are here to become, where the energy comes from, and what makes a week feel worth having. Its sign gives the direction; its house names the stage where that light is meant to be visible. Themes attached to the Sun keep coming back until they are actually lived rather than admired from a distance.

  2. ☽
    Moon

    The Moon is the private weather of a birth chart: what soothes, what unsettles, and what home has to feel like before anyone can relax in it. It rules the reaction that arrives before the opinion - the thing you do at eleven at night when nobody is watching. It also moves faster than anything else in the chart, which is why it is the one placement that usually needs a birth hour to pin down.

  3. ☿
    Mercury

    Mercury in a birth chart is how a mind takes the world in and hands it back: thinking speed, speech, humour, the shape of curiosity. It shows whether somebody learns by talking, reading or doing, how they argue and how they listen, and which subjects make their sentences suddenly get faster. It is the traffic of a chart rather than its destination.

  4. ♀
    Venus

    Venus is the department of taste and affection in a birth chart: what a person finds beautiful, what they will spend on, and how they show fondness when nobody has asked them to. It describes values as much as romance - what feels precious enough to keep - and the kind of closeness that reads as a gift rather than an obligation.

  5. ♂
    Mars

    Mars is the engine of a birth chart: drive, appetite, courage, and the particular way somebody goes after a thing they want. It sets the style of action - quick spark or long steady push - and it is also where anger lives, which is why one placement explains both the ambition and the slammed drawer. Read it as fuel with a preferred route.

  6. ♃
    Jupiter

    Jupiter is where a birth chart expects the world to be generous: the areas that open up when you push on them, where confidence grows faster than the evidence for it, and where being generous tends to come back. It points at the direction a life naturally wants to get bigger in - and it is the last planet slow enough to describe a person rather than a generation.

  7. ♄
    Saturn

    Saturn marks the one part of a birth chart where nothing is handed over: the subject that has to be earned, in order, over time. Patience and honest repetition turn that area into real authority, which is why the hardest item on the list so reliably becomes the strongest skill. It is not a punishment; it is the backbone a person builds for themselves.

  8. ♅
    Uranus

    Uranus is the refusal in a birth chart - the part of life where the standard arrangement was never going to fit and routine has to break for the air to move. It brings sudden clarity rather than gradual change. It also takes about seven years to cross a sign, so the sign belongs to your whole school year; the house is the part that belongs to you.

  9. ♆
    Neptune

    Neptune is where the edges of the practical world go soft in a birth chart: imagination, empathy, the pull towards something larger than the schedule. It shows where inspiration arrives unsummoned, and equally where a person is most willing to be charmed by a good story. Fourteen years to a sign, so the personal part of it lives in the house.

  10. ♇
    Pluto

    Pluto is a birth chart’s capacity to be rebuilt: the area where an old version of a person can be put down and a sturdier one picked up. Intensity, stamina and the willingness to stay honest about something uncomfortable all sit here. It moves so slowly that the sign belongs to an era - what is yours is where it landed and what it touches.

Jupiter in Capricorn, Venus in Taurus: how many people share it with you

The phrase “Venus in Taurus” means one thing for Venus and something quite different for Neptune, and the difference is speed. Measured over two centuries of ephemerides, 1900–2100:

PlanetTime in one signLongest unbroken stayRetrograde
Sun30.4 days31.5 daysnever
Moon2 days 6h2 days 13hnever
Mercury30.4 days69 days19.2%
Venus30.4 days126 days7.2%
Mars57 days235 days9.5%
Jupiter11.8 months13 months30.2%
Saturn2.4 years3.0 years36.4%
Uranus7.1 years7.2 years41.2%
Neptune13.6 years13.2 years42.9%
Pluto18.9 years27.3 years44.1%

Read the first column as a crowd size. Your Moon sign is shared with people born in the same two days; your Mars sign with two months of babies; your Uranus sign with everyone in your school year and the six after it. That is why the fast planets describe a person and the slow ones describe a generation - and why an outer planet only becomes personal through the house it lands in and the aspects it makes.

The second column is the surprise. Mars normally crosses a sign in under two months, but a retrograde loop can pin it in one for 235 days - so “Mars in Virgo” can mean a fortnight of births or most of a year, depending on which pass you were born on.

Frequently asked questions

What is a dominant planet and how do I find mine?

The dominant is the planet that “sounds” loudest in a chart: sitting on the angles, collecting many aspects, ruling the ascendant. Schools have no single formula - calculators disagree - so we do not print one number: reading the whole chart is more honest.

What does a retrograde planet mean in a natal chart?

The retro mark means the planet visibly moved “backwards” as seen from Earth at that moment. In natal reading it is not a defect but an inward accent: the planet’s theme is lived more deeply and less for show.

Why are there no houses without a birth time?

Houses are tied to the Earth’s rotation and shift every few minutes. Planet signs barely change within a day (except the Moon), so without a time we honestly compute signs for noon and do not invent houses.

Personal vs outer planets - what is the difference?

The Sun, Moon, Mercury, Venus and Mars move fast and describe character. Jupiter and Saturn are social: growth and maturity. Uranus, Neptune and Pluto spend years in a sign - a generational backdrop that turns personal through houses and aspects.

Calculating the positions is astronomy; interpreting them is a symbolic system for self-reflection, not science.

Planets are only the alphabet

A full reading is about the connections: how the Moon gets along with Mars, what strengthens Saturn, where the whole chart points. Luna builds it from real ephemerides and tells the story by voice.

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