astroengine writes: "As NASA's Wide-field Infrared Survey Explorer (WISE) discovered more and more cool "failed stars" (a.k.a. brown dwarfs), excitement grew for the possibility that there may be huge numbers of sub-stellar objects cruising interstellar space. Alas, in our volume of the Milky Way at least, this idea may have been a little premature. WISE has now pegged the distances of these brown dwarfs from Earth and found their population to be more sparse than previously believed. Rather than one brown dwarf per star, there seems to be one brown dwarf for every six stars."
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