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Brown dwarfs are bigger than Jupiter-sized planets but too small for nuclear fusion, the signature process that gives a star its shine
Members of the NASA-funded 'Backyard Worlds: Planet 9' have created the ''most complete'' three-dimensional map of 525 brown dwarfs around the Sun.
The 3D map encompasses a radius of 65 light-years, or about 400 trillion miles, with “close neighbours” inhabiting space within about 35 light-years, or 200 trillion miles.
To achieve this feat, scientists tapped into the worldwide network of 150,000 volunteers. The study has been published in the journals Nature and the Astrophysical Journal Letters.
“Without the citizen scientists, we couldn't have created such a complete sample in so short a time,” said J. Davy Kirkpatrick, a scientist at Caltech/IPAC in Pasadena and lead author of the study. “Having the power of thousands of inquiring eyes on the data enabled us to find brown dwarf candidates much faster.”

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