Brown Dwarfs

A brown dwarf is an object that formed the way stars do, from the collapse of a molecular cloud, but that, because it is not massive enough, does not sustain stable hydrogen fusion in its core.

The first object positively identified as a brown dwarf is the faint companion to the M1 V (low mass, red, Main Sequence) star Gliese 229. The brown dwarf is known as Gliese 229b.

  • Here is the HST image of Gliese 229b

    Suggested readings:

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