Epsilon Pulsar Cluster

From Memory Alpha, the free Star Trek reference

The Epsilon Pulsar Cluster is a cluster of pulsars that had recently formed in the Epsilon 9 sector as of 2365. Shortly after Stardate 42723, the USS Enterprise-D performed an astronomical survey of the cluster, a mission eagerly anticipated by Captain Jean-Luc Picard. (TNG: "Samaritan Snare")