Mercury is a small planet, and based on its dimensions, it is quite similar to the Moon. Its diameter is about 5,000 km and the distance from the Sun is 58,000.000 km. Its surface is cratered just like the surface of the Moon. Element of the Mercury is the Earth. On a daily basis it passes 1 or 2 degrees and all 12 signs of the Zodiac for about a year.

His night domicile is in Gemini and daily domicile is in Virgo. Mercury has the weakest influence on Pisces and Sagittarius and the positive influence on Scorpio (intellectual power and lucidity). It is in decline in Taurus (it creates the love for money which cause avarice).

Mercury is the God of trade, harlequin; uncontrolled quicksilver and greed for everything. It affects the mental relationship with the outside world, reason, logic, criticism, intelligence and intellectualism, calculus and adaptability. It is unpredictable and it causes constant changes. It is the symbol is puberty, brothers, peers, colleagues, relatives, friends, co-workers, cunning people, spies, astronomers, mathematicians, thieves; literature; any means of communication and transport; commercial exchange, travel, study. It creates good speakers and quarrelsome persons.

Mercury people want to stay forever young. It can be the cause of insanity, cough, hoarseness and vomiting.

Its day is Wednesday. It manages people’s lungs, bronchi, nerve and cerebral system, hearing, hands, intestines, fingers, memory, imagination, body movements. Mercury's plant acacia; Color: gray; Animals: snakes, genus, duck, and goose.

If Mercury is harmonious with planets within the personal horoscope, it provides for common sense, skilled hands, good speech ability, the ability to analyze, mobility, wit and humor. If Mercury is inharmonious, it causes irony, sarcasm, inquisitorial behavior, unfruitful polemics, cynicism, hypocrisy and instability.

Mercury years: 1907, 1914, 1921, 1928, 1935, 1942, 1949, 1956, 1963, 1970, 1977, 1984, 1991; every seventh year.