Retrograde

A period during which a planet appears, from Earth's perspective, to move backward through the zodiac, often interpreted as a time of review, revision, or internalization of that planet's themes.

Retrograde motion is an apparent reversal: a planet that has been moving forward (direct) through the zodiac slows, stops, and appears to move backward for a period before stopping again and resuming forward motion. The effect is geometric, not actual — the planets do not really move backward — but caused by the relative motion of Earth and the other planet around the Sun. As Earth overtakes (or is overtaken by) another planet, the perspective creates the apparent reversal.

Each planet retrogrades on its own schedule. Mercury retrogrades three or four times a year for about three weeks each time. Venus retrogrades about every 18 months for about 40 days. Mars retrogrades every two years for about two months. The outer planets retrograde once a year for several months at a time — Saturn retrograde lasts about 4.5 months, Uranus about five months, Neptune about five months, Pluto about six months.

Astrologically, retrogrades are interpreted as periods of review, internalization, or revisiting of the planet's themes. Mercury retrograde, the most famous, is associated with miscommunication, technology hiccups, travel snags, and (more usefully) with reviewing past decisions, revising drafts, and reconnecting with people from earlier chapters. The pop-culture version of "Mercury retrograde causes everything to go wrong" is an exaggeration of the underlying observation: things that benefit from a second look tend to surface during this window.

Outer planet retrogrades are less dramatic in daily life because they are happening so often and so slowly. Saturn, Jupiter, Uranus, Neptune, and Pluto are retrograde for a substantial fraction of every year. Their retrograde periods are interpreted as deepening or interiorizing the themes they were already working on.