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Substellar objects bridge the evolutionary gap between giant gas planets and stars. The figure is taken from ESA, which is linked in full on this page. Every fact on Mondo Knows names its source rather than repeating an unsourced claim.

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Brown dwarfs are failed stars that cannot sustain core nuclear fusion

Substellar objects bridge the evolutionary gap between giant gas planets and stars

Brown dwarfs are substellar objects with masses ranging between 13 and 80 Jupiter masses. Lacking sufficient gravitational pressure to ignite sustained hydrogen nuclear fusion in their cores, brown dwarfs glow dimly in infrared as they slowly cool, occupying a middle ground between giant planets and red dwarf stars.

Failing stars (heic0601f) — NASA , ESA , M. Robberto ( Space Telescope Science Institute /ESA) and the Hubble Space Telescope Orion Treasury Project · Public domain · source

Where this comes from

ESA

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Tags: brown dwarf, stars, fusion

Brown dwarfs are failed stars that cannot sustain core nuclear fusion: the short answers

Where does this come from, and can I check it?: Substellar objects bridge the evolutionary gap between giant gas planets and stars. The figure is taken from ESA, which is linked in full on this page. Every fact on Mondo Knows names its source rather than repeating an unsourced claim.
Is this really a space fact?: Yes. It sits on the Space shelf, one of 1,090 sourced facts grouped into space, animals, the human body, history, science and more. Category pages collect every fact in the same field.
What else can I read about it?: The links under the fact point to a quiz, game, puzzle or calculator on the same subject, and the shelf below shows related facts. The wording here is original, and quoted phrases are marked as quotations.