![Class T cluster](https://cdn.statically.io/img/static.wikia.nocookie.net/memoryalpha/images/6/63/Class_T_cluster.jpg/revision/latest/scale-to-width-down/180?cb=20060407001337&path-prefix=en)
The Delta Flyer approaching a class T cluster
A class T cluster was a type of stellar nursery, containing numerous protostars, gas giants, radiogenic sources, and various spatial anomalies.
The Delta Flyer investigated a T-class cluster in 2376, where it encountered a dark matter lifeform. (VOY: "Good Shepherd")