Mercury is tidally locked with the Sun, so one side is perpetually hot and the other half is perpetually cold. Similarly, Mercury is a planet of dualities, a wildcard, a trickster, sometimes hot, sometimes cold, sometimes good, sometimes bad. Mercury is the fastest planet in our solar system, appearing to zip backward between the Earth and the Sun three times each year. Mercury’s speed and erratic behavior mirror the restlessness of the mind, the rapidity of thought, the fluidity of speech. As the planet closest to the Sun, Mercury serves as an emissary, a translator, a messenger for the Sun. In astrology, Mercury represents the way we think and reason, the way we speak and communicate, saying something about our interests, skills and hobbies, our sense of humor. It stirs up and unsettles, facilitating dialogue and communication about the topics of the signs it transits through.
Here are the links to my interpretations of Mercury in each sign of the zodiac: