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Are brown dwarfs cooled down white dwarfs?

Best Answers

No. Brown dwarfs are “failed stars”. They don't quite have the mass to do regular fusion like real stars and instead do deuterium fusion (probably). But deuterium is relatively rare and its fusion doesn't produce so much energy, so brown dwarfs just kinda get warm. read more

No - white dwarfs are the leftovers when a sun-like star expends all its nuclear fuel. Brown dwarfs are failed stars with insufficient mass for nuclear fusion to be ignited in the first place. read more

A black dwarf is a white dwarf that has cooled down to the temperature of the cosmic microwave background, and so is invisible. Unlike red dwarfs, brown dwarfs, and white dwarfs, black dwarfs are entirely hypothetical. read more

Objects below 13 M J, called sub-brown dwarf or planetary-mass brown dwarf, form in the same manner as stars and brown dwarfs (i.e. through the collapse of a gas cloud) but have a mass below the limiting mass for thermonuclear fusion of deuterium. read more

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