Discovery of giant ‘exosatellite’ challenges our notion of what makes a moon

· Physicsworld · July 22, 2026, 3:24 p.m.
Planetary science astronomy Space Exploration Exosatellites Brown Dwarfs
Summary
The blog post discusses the discovery of a giant exosatellite orbiting a brown dwarf star, which challenges existing definitions of what constitutes a moon. It emphasizes the novel hierarchical relationship in the system of CD-35 2722.
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