The Gamma Erandi Nebula was a stellar nursery that was located in the Alpha or Beta Quadrant.
This nebula had an energy expenditure of 5.34×1041 watts, which was fairly typical of this type of phenomenon. The nebula generated high levels of subspace static, which interfered with nearby subspace communications.
In 2366, the USS Enterprise-D conducted a study of the Gamma Erandi Nebula after attending the biennial Trade Agreements Conference on Betazed. The ambient interference prevented them from receiving a Betazoid message that William T. Riker, Deanna Troi, and Lwaxana Troi were missing until two days after the occurrence. (TNG: "Ménage à Troi")
The script described the appearance of the nebula as gaseous interstellar cloud aglow with brilliant light reflected back from its ionized particles. Within are nests of hundreds of embryonic stars, dense globules of nuclear fusion pouring forth light and heat, on the most massive scale imaginable." [1]
It was probable that one of the stars in this nebula was named Gamma Erandi. Based on the structure of their name, this star and Sigma Erandi were stars in the same constellation.
In the Bayer designation, which was a system of stellar classification, the Greek letter indicated the brightness of a star in a constellation. In this case, Gamma Erandi would be the 3rd brightest star in its constellation.