Brown dwarfs are
A) large terrestrial planets.
B) objects massive enough to fuse deuterium but not massive enough to sustain hydrogen fusion.
C) very low-mass main sequence stars.
D) what is left over after a massive star ejects most of its material through a supernova.

Question

Quizplus · Accepted Answer

Brown dwarfs are substellar objects that are not massive enough to sustain hydrogen fusion in their cores, but they can fuse deuterium, which requires less pressure and temperature.

Brown Dwarfs Are