What is Pluto?
Pluto is a dwarf planet (134340 Pluto), not one of the eight planets: an icy world 2,377 km across, smaller than our Moon, in the Kuiper Belt beyond Neptune. Clyde Tombaugh discovered it in 1930; in 2006 the International Astronomical Union classed it as a dwarf planet, because it shares its orbit with many other icy bodies. Its orbit is long and tilted: it averages 5.9 billion km (39.5 au) from the Sun and goes around in 248 years. Its largest moon, Charon, is half its size.
Where Pluto is in the sky
The ecliptic is the path the Sun appears to follow across our sky over a year, the plane of Earth’s orbit seen from Earth. Positions along it are measured in degrees, from 0° at the March equinox to 360°. The zodiac divides it into twelve equal 30° parts named after signs: Aries covers 0° to 30°, Taurus 30° to 60°, and so on. The signs are counted from the equinox, not from the star patterns they were named after; those constellations now sit about 24° further along, because Earth’s axis slowly wobbles (precession).
Pluto moves along the ecliptic at up to about 0.04° a day. Its oval orbit makes it spend anywhere from about 12 to 31 years in a sign. Its orbit is tilted 17° to the ecliptic, so it can sit well north or south of it.
Pluto in astrology
In astrology Pluto stands for transformation, power, endings and rebirth: what has to be let go so something new can grow. Astrology still uses it, whatever its astronomical class. It is the modern ruler of Scorpio, and because it stays in a sign for decades, its sign marks a generation.
Pluto and your sign
Astrology also reads the twelve signs as twelve houses, each one an area of life, counted from your own sign: your sign is your 1st house, the next sign your 2nd, and so on around the zodiac. So Pluto, now in Aquarius, falls in a different house for every sign. For example, Aquarius is the 11th house for Aries, the house of friends and future plans. Find your sign below, and read your daily horoscope for how the day plays out.
- Aries 11th house · friends and future plans
- Taurus 10th house · career and reputation
- Gemini 9th house · travel and beliefs
- Cancer 8th house · intimacy and shared resources
- Leo 7th house · partnerships
- Virgo 6th house · work and wellbeing
- Libra 5th house · romance and creativity
- Scorpio 4th house · home and family
- Sagittarius 3rd house · communication and learning
- Capricorn 2nd house · money and values
- Aquarius 1st house · self and fresh starts
- Pisces 12th house · rest and reflection
Frequently asked questions
- Is Pluto still a planet?
- Not in astronomy: since 2006 it is classed as a dwarf planet, because it has not cleared its orbit of other icy bodies. Astrology still follows it like the planets.
- How far away is Pluto?
- On average 5.9 billion km from the Sun, between about 4.4 and 7.4 billion km on its oval orbit; sunlight takes about five and a half hours to reach it.
- How long is Pluto in each sign?
- From about 12 to 31 years, because its orbit is so oval; it goes around the zodiac in 248 years.
- What does Pluto mean in astrology?
- Transformation, power and rebirth. It is the modern ruler of Scorpio.