Mercury

Where the name comes from

Mercury is named for the Roman messenger god, the one with winged sandals, because it is the fastest of the planets. It races around the Sun in just 88 days, far quicker than any other, so the name fits the thing you actually see.

Always near the Sun

Because it hugs the Sun so tightly, Mercury never appears in a dark midnight sky. It only shows up briefly, low down, in the twilight after sunset or before dawn. Plenty of famous astronomers claimed they never once saw it with their own eyes.

A world of extremes

Mercury has almost no air to hold heat, so it swings from scorching in the sunlight to deep freezing in the shade. It is the smallest planet, barely larger than our own Moon, and just as cratered.

Mercury in a birth chart

Astrologers read Mercury as the mind at work. It covers how you think, talk, write, learn, bargain and move around your neighbourhood, and traditionally it rules both Gemini and Virgo, the chatty sign and the precise one. Its sign describes the style of thinking, quick and blunt in Aries, slow and thorough in Taurus, and its house shows where you spend that mental energy. The old astrologers called it the most changeable of the planets, taking on the colour of whatever it touched.

How to find yours

Because Mercury stays so close to the Sun, Hali’s positions for 1950 to 2050 put it in the same sign as the Sun 51.3 percent of the time, one sign earlier 24.3 percent and one sign later 24.4 percent. It changes sign about 14.8 times a year, and while a typical stay is 24.6 days, a retrograde loop can hold it in one sign for up to 69.2 days. The Mercury sign calculator finds yours, and the guides start with Mercury in Gemini.

Retrograde

Mercury turns retrograde about three times a year, 3.16 on average between 1950 and 2049, each time for roughly three weeks. That adds up to 19.2 percent of the time, so about one person in five is born with Mercury retrograde. The Mercury retrograde page lists the dates and checks your birthday.

Common confusions

Mercury retrograde is not a curse on phones and contracts, whatever the internet says, and being born with it does not mean you think badly. It is often read as a mind that rethinks before it speaks. The Mercury guide covers the planet in more depth.