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![Brown dwarf around the red dwarf star Gliese 229 - Brown dwarf around red dwarf Gliese 229 - First false-colored image of a brown dwarf. With a mass of 20 to 50 times that of Jupiter, but of a diameter equivalent to the gas planet, GL229B, is orbiting around the red dwarf star Gliese 229, about 18 years - light from Earth in the constellation Lievre. On the left, the observation made from the ground in adaptive optics at Mount Palomar, October 27, 1994. On the right, the image obtained by the Hubble space telescope on November 17, 1995. 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). Brown dwarfs are a mysterious class of long - sought objects that form the same way stars do, by condensing out of a cloud of hydrogen gas. However, they do not accumulate enough mass to sustain nuclear fusion at their core, which make stars shine. [left] - The brown dwarf (center) was first observed in far red light October 27, 1994 using the adaptive optics device and a 60 - inch reflecting telescope on Palomar Mountain in California. Another year was required to confirm that the object was actually gravitationally bound to the companion star. GL229B is at least four billion miles from its companion star, roughly the separation between the planet Pluto and our Sun. Even though a cornograph on the detector masked most of the light from the star, which is off the left edge of the image, it is so bright relative to the brown dwarf the glare floods the detector. [right] - This image of the GL229B (center) was taken with Hubble Space Telescope's Wide Field Planetary Camera -](https://images-cdn.bridgemanimages.com/api/1.0/image/600wm.PIX.30357540.7055475/4572124.jpg?old-wm)
Sebastian Voltmer
PIX4635906
Sebastian Voltmer
PIX4635906
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