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Are brown dwarf stars fusion stars?

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Sometimes collapsing clouds of gas and dust don't quite manage to make it as stars. These objects, known as brown dwarfs, have many of the elements of their more famous siblings but lack the mass needed to jumpstart nuclear fusion in their core. read more

Brown dwarfs are not stars that were ignited by fusion. Brown dwarfs are small , starting at about 2 Jupiter’s up to 0.08 solar masses. They are cool and do not radiate light . They can be detected only through infrared telescopes which accounts for the fact they they were only visualized as recently as 1995. read more

Brown dwarfs are objects which have a size between that of a giant planet like Jupiter and that of a small star. In fact, most astronomers would classify any object with between 15 times the mass of Jupiter and 75 times the mass of Jupiter to be a brown dwarf. read more

Instead, before the temperatures get hot enough for hydrogen fusion to start, the close-packed material reaches a stable state and becomes a brown dwarf. "Brown dwarfs are the missing link between gas giant planets like Jupiter and small stars like red dwarfs," Ian McLean, an astronomer at the University of California, Los Angeles, said in a statement. read more

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