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Astronomers identify purest, most massive brown dwarf

Astronomers have identified a record breaking brown dwarf (a star too small for nuclear fusion) with the ‘purest’ composition and the highest mass yet known. The object, known as SDSS J0104+1535, is a member of the so-called halo — the outermost reaches — of our galaxy, made up of the most ancient stars.

(via WSJ)