Astrologically modern Western astrologers associate the planet Neptune with idealism and compassion, but also with illusion, confusion and deception; with religions, spirituality and mysticism, the mass media, creativity in art and music, drugs, extreme sensitivity, fantasy and imagination, psychic phenomena and altered mental states. Neptune governs hospitals, prisons, mental institutions, and any place, such as a monastery, that involves a retreat from society. Its appearance coincided with the discovery of anesthetics and hypnotism . In political terms Neptune was linked to the rise of nationalist movements throughout Europe in countries like Germany, Italy, Hungary, Ireland and Serbia, seeking independence for their nations inspired by an idealised past of legend. It was also linked to the rise of socialism and the beginnings of the welfare state. Neptune also coincided with the utopian ideals of Communism, when Marx and Engels first published 'The Communist Manifesto' in 1848.
The planet Neptune
In art, the impressionist movement began a trend away from literal representation, to one based on the subtle, changing moods of light and colour. In medicine Neptune seems particularly associated with the thalamus, the spinal canal, and severe or mysterious illnesses and neuroses. Neptune is considered by modern astrologers to be co-ruler of the 12th house with Jupiter.
Nowadays modern astrologers considers Neptune the ruler of Pisces, but prior to the discovery of Neptune, Jupiter was the one considered as the ruler of Pisces, even though some modern astrologers consider Jupiter a co-ruler of Pisces. Some astrologers do not believe that Neptune rules any particular sign, even though they may use the planet in interpretation.