Neptune in a birth chart
The story of its discovery sums up its symbolism well.
In 1846, Urbain Le Verrier calculated the position of an invisible planet disturbing the orbit of Uranus; Johann Galle, who received his results in Berlin, found it that very evening, less than a degree from the announced spot. Neptune thus emerged from calculation before appearing in a telescope. Astrology made it the planet of what is sensed: dreams, art, music, spirituality, empathy.
With a trip around the zodiac in one hundred sixty-five years, Neptune stays nearly fourteen years in each sign: it describes the collective dreams of a generation, its ideals and its mirages. It is its house that makes it personal. In the 2nd house, money could become hazy or, on the contrary, serve an ideal; in the 5th, creation would be inspired; in the 10th, vocation would sometimes take an artistic or humanitarian turn. A tight contact with the Sun, the Moon, or Venus accentuates this sensitivity in the character.
Its downside is fog: not seeing what is before your eyes, idealizing a person or a situation, preferring escape to confrontation. Neptune asks you to keep one foot on the ground so that imagination feeds life instead of drawing you away from it: reread a contract signed in enthusiasm, ask the opinion of a clear-eyed friend, check before giving.