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Back Brown Dwarf Gliese 299B

Brown Dwarf Gliese 299B


Depicts: Gliese 229B
Copyright: S. Kulkarni (Caltech), D.Golimowski (JHU) and NASA

These two false-color telescope images reveal the faintest object ever seen around a star beyond our Sun, and the first unambiguous detection of a brown dwarf. The brown dwarf, called GL229B, orbits the red dwarf star Gliese 229, located approximately 18 light-years away in the constellation Lepus. The brown dwarf is about 20-50 times the mass of Jupiter, but is so dense it is about the same diameter as Jupiter (80,000 miles).
Last Update: 1 September 2019
15-Mar-2026 11:18 UT

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