Grand Cross in Astrology: Four Squares, Two Oppositions and a Check

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A grand cross, sometimes called a grand square, is four bodies spaced about 90° apart around the chart. Neighbours square each other and bodies across the circle oppose each other, so the figure contains two oppositions and four squares. It is a T-square with its open side filled, and that is also how most errors happen: a body near the empty leg is taken as proof of a cross before its legs are measured. The general method is on how to find aspect patterns.

Scope of these guides: the worked examples use the Sun, Moon, Mercury, Venus, Mars, Jupiter, Saturn, Uranus, Neptune, Pluto and Chiron, and every leg is checked with the free chart's fixed orbs: conjunction 8°, sextile 6°, square 8°, trine 8° and opposition 8°, with the edge value counting. This is the teaching scope of these pages, not a rule that other points can never take part in a pattern. The Lunar Nodes, the chart angles and Lilith are left out of the main examples.

Calculator note: the free birth chart draws each major aspect as its own line on the wheel. It does not name patterns, has no pattern report and shows no numeric aspect list, so any figure on these pages was checked by hand from the planet table. Glyphs can be pushed sideways so they do not overlap; the small tick on the inner ring marks each body's true position.

All six pairs

Four bodies make six pairs, and a grand cross needs every one of them: the four neighbouring pairs between 82° and 98°, and the two crossing pairs between 172° and 180°. Five out of six is not a cross. Because the squares and oppositions share an 8° orb, the body positions can drift a few degrees from a perfect square before a leg fails, but each leg fails on its own terms.

A worked example

Daniel is a made-up name for a real set of positions: London, 5 August 1999, 12:00, run through the same code the free chart uses. Going round the circle:

All six hold, so this is a grand cross in the fixed signs. Its widest leg is the Saturn-Sun square, 4.05° from exact and still well inside the window.

Four T-squares inside one cross

Each opposition, together with either of the other two bodies, makes a T-square: Sun and Uranus with Mars or with Saturn at the apex, and Saturn and Mars with the Sun or with Uranus at the apex. That is four T-square combinations, all part of the same figure. A tally that counts both the cross and its four T-squares as separate patterns overstates what the chart holds. For a reading, it is one cross.

Reading the four together

Two pairs pull against each other here. The Sun and Uranus set the wish to be seen as oneself against the urge to break away from what is expected; Saturn and Mars set structure and caution against drive and heat. The squares tie each pair to the other, so neither tension can be eased in isolation. A common reading is a feeling of being pulled in several directions at once, with no single outlet. Astrologers who work with grand crosses often add the other side: such a figure may also be read as stamina and the ability to hold competing demands. In fixed signs the tone can be persistence, and also difficulty letting go once a position is taken. These are possibilities to compare with experience, not verdicts on a person.

A near miss: five legs of six

Grace is fictional too, born in London on 31 July 1999 at 12:00, five days before Daniel. The same four bodies are close to the same places, but the Sun is earlier in Leo.

One square fails, so Grace has no Saturn, Sun, Mars and Uranus cross. What remains are two T-squares: Sun and Uranus with Mars at the apex, and Saturn and Mars with Uranus at the apex. On the wheel her chart can look almost identical to Daniel's, which is why the missing line between Saturn and the Sun matters. Her date also shows how much a few hours can change: for a birth before 00:47 the chart held a different fixed cross, with Jupiter and Neptune in place of Saturn and Uranus.

The Lunar Nodes in this chart

Daniel's North Node is at 12°56' Leo, 0.33° from his Sun, so the South Node at 12°56' Aquarius sits 1.97° from Uranus. Mars squares the nodal axis within 0.70° and Saturn within 3.72°. The wheel draws lines from each Node to these planets, though not between the two Nodes, so the figure can look busier than it is. The Nodes may take part in interpretation, but their exact opposition is built into how they are defined and is not counted as an aspect. These guides therefore do not count a second cross made from the axis. How a planet square the nodal axis is read is covered on Sun square the Lunar Nodes, and a 1965 mutable cross that included the nodal axis on Neptune or Pluto square the Lunar Nodes.

Glyphs, rounding and the birth time

The Uranus glyph in Daniel's wheel is drawn about 12° from its tick, pushed aside by the South Node, so the cross looks bent if you follow the glyphs. The lines run between the true positions. The table's minutes come from positions rounded to 0.01° and then truncated, so they are display precision only. None of Daniel's six legs is near an edge, but a leg within about a minute of one cannot be settled from the table.

At 12:00 Daniel's Moon is at 22°17' Taurus, 5.63° from Saturn and square Uranus, yet 0.65° short of opposing Mars. Earlier that day it was in orb: from 00:00 to 08:57, while the Moon moved from 15°10' to 20°28' Taurus, it formed a second cross with the Sun, Mars and Uranus, taking Saturn's corner. A birth in those hours would give two overlapping crosses that share three bodies, which a careful count lists as two combinations and a reading treats as one five-body figure. Without a birth time none of that can be established: the free chart draws no Moon lines and its noon Moon is a date reference. The Saturn, Sun, Mars and Uranus cross held at all 1,440 whole-minute times of the date.

Related articles

• T-Square in Astrology
• Sun Opposite Uranus
• Mars Opposite Saturn
• Saturn Square Uranus
• Aspect Patterns in Astrology