For a planet to be classified as an out of bounds planet, it must be traveling through our sky at a remarkably high or low angle along the ecliptic–the path created forged by the Sun and Moon, occupied by the zodiacal constellations, that one strip of sky through which the first astrologers noted that stars were moving.
The “bounds” are determined by the Sun’s north-and-south range along the east-to-west ecliptic. Go outside for your next visible sunset and mark where the Sun touches the horizon in the west. Some time later (a week, a month, three months), stand in the same place for sunset, and you will notice that the Sun’s descension point is either further north or south than when you first saw it. For us living on the northern hemisphere, the Sun is at its northernmost on Summer Solstice, and southernmost on Winter Solstice. The path of the Sun on these polar days creates the “bounds” of the ecliptic, measured at 23.3 degrees north or south (+ or -) in a common declination table.
And so, when a planet is traveling along the ecliptic but outside of these bounds, that planet is designated as out of bounds. This tends to occur almost exclusively within the signs of Gemini, Cancer, Sagittarius and Capricorn–the signs bookending the summer and winter solstices.
This is a very surface-level explanation of the mechanics of out of bounds planets. And as much as I enjoy the astronomy realm of astrology, I’m more interested in relaying information about meaning here. So, if you feel the need for a deeper understanding and great visuals, go over to Nick Anthony Fiorenza’s The Lunar Planner and learn more.
You or someone you know has an out of bounds planet, but what does that mean?
Meaning! It’s what makes astrology astrology.
Really, each out of bounds planet shows its quirky characteristics in specific ways, but there are some thematic commonalities from the Moon on out. For instance, the scofflaw trait.