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Astronomers Discover Extremely Rare Hierarchical Quadruple System

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Aug 19, 2025 - 12:30
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Astronomers Discover Extremely Rare Hierarchical Quadruple System
An artist’s impression of the UPM J1040-3551 system against the backdrop of the Milky Way as observed by ESA’s Gaia satellite; on the left, UPM J1040-3551 Aa & Ab appears as a distant bright orange dot, with an inset revealing these two M-type stars in orbit; on the right, in the foreground, a pair of cold brown dwarfs -- UPM J1040-3551 Ba & Bb -- orbit each other for a period of decades while collectively circling UPM J1040-3551 Aab in a vast orbit that takes over 100,000 years to complete. Image credit: Jiaxin Zhong / Zenghua Zhang.

Named UPM J1040-3551 AabBab, the newly-discovered quadruple star system consists of a pair of cold brown dwarfs and a pair of young red dwarfs.

The post Astronomers Discover Extremely Rare Hierarchical Quadruple System appeared first on Sci.News: Breaking Science News.

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