Astrology & Tarot
Every card in the deck has a place in the sky. Twelve Major Arcana carry a zodiac sign, ten carry a planet, and the thirty-six numbered pips map onto the thirty-six decans — the ten-degree slices the zodiac divides into.
Where these attributions come from
The system below is the Hermetic Order of the Golden Dawn's, worked out in the late nineteenth century and inherited by both the Rider-Waite-Smith deck and Crowley and Harris's Thoth. It is not the only system — older Continental traditions attribute differently, and some modern readers reject planetary correspondence entirely — but it is the one that underlies most English-language tarot published since 1910.
What makes it worth learning is that it is consistent. The trumps run in zodiacal order, the pips run in decan order, and the two interlock. That interlocking is what allows a card to be read against a live sky rather than in isolation, which is what this site does every day.
The twelve signs
| Sign | Dates | Element | Mode | Ruler | Major Arcana |
|---|---|---|---|---|---|
| Aries | Mar 21 - Apr 19 | Fire | Cardinal | Mars | The Emperor |
| Taurus | Apr 20 - May 20 | Earth | Fixed | Venus | The Hierophant |
| Gemini | May 21 - Jun 20 | Air | Mutable | Mercury | The Lovers |
| Cancer | Jun 21 - Jul 22 | Water | Cardinal | Moon | The Chariot |
| Leo | Jul 23 - Aug 22 | Fire | Fixed | Sun | Strength |
| Virgo | Aug 23 - Sep 22 | Earth | Mutable | Mercury | The Hermit |
| Libra | Sep 23 - Oct 22 | Air | Cardinal | Venus | Justice |
| Scorpio | Oct 23 - Nov 21 | Water | Fixed | Pluto | Death |
| Sagittarius | Nov 22 - Dec 21 | Fire | Mutable | Jupiter | Temperance |
| Capricorn | Dec 22 - Jan 19 | Earth | Cardinal | Saturn | The Devil |
| Aquarius | Jan 20 - Feb 18 | Air | Fixed | Uranus | The Star |
| Pisces | Feb 19 - Mar 20 | Water | Mutable | Neptune | The Moon |
The ten planets
| Planet | Rules | Major Arcana |
|---|---|---|
| Sun | Leo | The Sun |
| Moon | Cancer | The High Priestess |
| Mercury | Gemini and Virgo | The Magician |
| Venus | Taurus and Libra | The Empress |
| Mars | Aries | The Tower |
| Jupiter | Sagittarius | Wheel of Fortune |
| Saturn | Capricorn | The World |
| Uranus | Aquarius | The Fool |
| Neptune | Pisces | The Hanged Man |
| Pluto | Scorpio | Judgement |
The 36 decans
Each sign divides into three decans of ten degrees, and each decan carries one numbered pip from Two to Ten. That is thirty-six decans and thirty-six pips, mapping one to one. The decan's ruling planet is what gives each pip its Golden Dawn title — the Two of Wands as Lord of Dominion, the Ten of Swords as Lord of Ruin.
Every sign page lists its three decans with dates, rulers and cards, and each decan has its own page. Browse all 36 decans →
Retrogrades
Three planets get their own page here, each showing whether it is retrograde today and when the next period runs, computed from the ephemeris rather than typed into a calendar. Retrogrades do not summon particular cards; they change what certain cards are asking.
| Planet | Card it carries | How often |
|---|---|---|
| Mercury retrograde | The Magician | Three or four times a year, ~3 weeks |
| Venus retrograde | The Empress | Every ~18 months, ~6 weeks |
| Mars retrograde | The Tower | Every ~26 months, ~10 weeks |