Each day we feature a different image or photograph of our fascinating universe, along with a brief explanation written by a professional astronomer. This question is arguably the most perplexing astronomical mystery of our time. Our universe could contain more brown dwarfs than any other type of star - but they are so dim they have so far escaped detection. The seemingly inconspicuous companion to the right of the overexposed image of a normal star is thought to be an elusive brown dwarf . Now that the existence of brown dwarfs has been demonstrated, a key remaining question is their abundance.
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