Brown dwarf
A brown dwarf was a stellar object that had characteristics of both a star and a gas giant.

In 2152 the  was on course to investigate a brown dwarf planetary system when the ship was infested by a symbiotic lifeform and the investigation was interrupted. () 

The Finibus system contained a brown dwarf, which in 2259 was in the process of being consumed by the system's black hole and was surrounded by a volatile gas cloud. In that year, the , under the command of Captain Christopher Pike, used the brown dwarf's thick atmosphere to hide from three Gorn hunters and a destroyer; one hunter was crushed by the atmospheric pressure while attempting to pursue the Enterprise toward the dwarf's center. () 

According to Data in 2365, the abundance of dysprosium in a brown dwarf star was different than regular stars, when factored with terbium, holmium, erbium, and europium. ()

External links
 
 

nl:Bruine dwerg
Celestial objects