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Rare Quadruple Star System Could Unlock Mystery of Brown Dwarfs

Summary by Phys.org
The exciting discovery of an extremely rare quadruple star system could significantly advance our understanding of brown dwarfs, astronomers say. These mysterious objects are too big to be considered a planet but also too small to be a star because they lack the mass to keep fusing atoms and blossom into fully-fledged suns.

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Special type quartet: Astronomers have discovered a quadruple star system with a unique configuration at 82 light-years distance: it is the first known quartet of two stars and two brown dwarfs. These form a hierarchical system in which two narrow pairs circle around a common mass center at a distance – that makes the quartet stable. Excitingly, however, this quadruple system is mainly because it could betray more about brown dwarfs – the border…

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Phys.org broke the news in United Kingdom on Tuesday, August 19, 2025.
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