Neptun is standing for the principles of nature, for the Great Spirit over the waters. It is a
symbol for the endless ocean and the eternal universe, and is associated with wisdom and spiritual
consciousness.
Though in mythology Neptun is male - as the god of water (Greek: Poseidon) and the brother of Zeus;
astrologists tend to see Neptun as a female planet, for in the occult traditions the water is a
female element.
Neptun rules Pisces in astrology. Since Neptune wasn't detected until 1846 it has no meaning in
traditional Tarot but gets associated to the
Hanged Man lately.
Uranus is the planet attached to changes, revolutions and motion, maybe just for
the fact that in Greek mythology Uranos was beaten by his son Kronos.
Uranus represents independence, impatience and rebellion, and also new inventions and detections.
In Tarot, Uranus is usually attached to the
Tower, but in my eyes it
also fits perfectly to the Devil
and the Fool.
First detected in 1781, Uranus has no meaning in older astrology, in newer astrology he is the
ruler of Aquarius.
Pluto
was first detected in 1930 and therefore it has no meaning in the traditional astrology. Nowadays,
some astrologists tend to see it as the master of Scorpio, but I prefer to believe that Scorpio is
quite happy with Mars...
Considering that the planet is named after the Greek god of the underworld - Pluton - I tend to
attach Pluto to Tarot cards like the Moon, the
High Priestess and the
Hermit.