There are differing opinions on the meaning and use of cusps in astrology. When we say someone is on the cusp, we are generally referring to a particular planet in their birth chart in the very ending or beginning degrees of a sign. If, for example, you have the Sun at 29 degrees Pisces (each sign holds 30 degrees), your Sun is on the cusp of Pisces and Aries (the imaginary line that separates the signs). Some astrologers believe planets on the cusp carry energy of both signs, as they are in a transitional space. Others do not incorporate cusps into interpretation, as planets are technically in a single sign. This is a fun area to explore for yourself.