India, June 25 -- Mercury Retrograde, Full Moons, and zodiac signs are among the most familiar concepts in astrology. Another term that has been drawing attention in modern Western astrology is out-of-bounds planets. While it is less widely known, some astrologers use it as an additional technique when interpreting a birth chart.

According to The Old Farmer's Almanac, the concept comes from astronomy rather than astrology. A planet is considered "out of bounds" when it moves beyond the Sun's usual path across the sky, measured by its declination. The Sun never travels farther than about 23.5 degrees north or south of the celestial equator. When another planet moves beyond that range, it is described as being out of bounds.

According to ...