File:Brown Dwarf Gliese 229B.jpg

Summary

The smaller object is the Gliese 229B brown dwarf orbiting the star Gliese 229, which is located in the constellation Lepus about 19 light years from Earth. Gliese 229B is about 20 to 50 times the mass of Jupiter.

Source

• NASA: http://starchild.gsfc.nasa.gov/Images/StarChild/questions/brown_dwarf.jpg
• Hubblesite STScI-1995-48: Astronomers Announce First Clear Evidence of a Brown Dwarf (November 29, 1995)

Licensing

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• Definition of planet