Do 'Ultracool' Brown Dwarfs Surround Us?

astroengine writes "The recent discovery of two very cool 'T-class' brown dwarfs in our cosmic neighborhood has prompted speculation that there may be many more ultracool 'failed stars' nearby (abstract). Not only are these objects themselves very interesting to study, should there be many such brown dwarfs spanning interstellar space. Perhaps they could be used as 'stepping stones' to the stars."

Comments

Re:Yes there are

[scharkalvin]

Large stars will never become brown dwarfs. They will end up as one of the following:
White dwarf, neutron star, or black hole. A white dwarf will eventually cool and become a black dwarf. The chemical composition of a white dwarf is NOTHING like that of a brown dwarf. A brown dwarf is hydrogen and a few other elements. A white dwarf has very little hydrogen, it is the 'ash' of a star that once was and is made of mostly heavier elements that are the result of fusion.