Ψψ Psi was a letter in the Greek alphabet of Earth, originating in the early period of Human history.
It was used in the following contexts:
Psi symbols on chalk board
- Medical terminology
- Psi-wave pattern
- Astronomical nomenclature
- Psi 5 Aurigae, a star system
- Psi 2000
- Psi Cancri, a star system
- Psi Draconis, a star system
- Psi Epsilon III, a planet
- Psi Epsilon IV, a planet
- Psi Octantis, a star system
- Psi Serpentis, a star system
- Psi Tauri, a star system
- Psi Upsilon III, a planet
- Psi Upsilon IV, a planet
- Psi Velorum, a star system
- See also