The objects now called "brown dwarfs" were theorized to exist in the 1960s by Shiv S. Kumar and were originally called black dwarfs, a classification for dark substellar objects floating freely in space that were not massive enough to sustain hydrogen fusion.
The objects now called "brown dwarfs" were theorized to exist in the 1960s by Shiv S. Kumar. The objects now called "brown dwarfs" were originally called black dwarfs. Black dwarfs were a classification for dark substellar objects. These dark substellar objects were floating freely in space. This space were not massive enough to sustain hydrogen fusion.