GJ
GJ the prefix of catalog entries in the Gliese star catalog, for the Gliese-Jahreiss…GJ the prefix of catalog entries in the Gliese star catalog, for the Gliese-Jahreiss expansion.
Meaning
2 sensesGJ the prefix of catalog entries in the Gliese star catalog, for the Gliese-Jahreiss expansion.
By extension, the prefix for any item catalogued in the Gliese star catalog.