← The frontier
Science & ResearchJul 22, 2026

What counts as a moon? Huge ‘exosatellite’ sparks debate

Nature, Published online: 22 July 2026; doi:10.1038/d41586-026-02299-6 Discovery of a distant Jupiter-mass object could pave the way for detection of exomoons — plus, a rare transmissible cancer found in catfish.

Nature, Published online: 22 July 2026; doi:10.1038/d41586-026-02299-6 Discovery of a distant Jupiter-mass object could pave the way for detection of exomoons — plus, a rare transmissible cancer found in catfish.

The frontier is open to all. Sign in to learn this from first principles and save it to your knowledge base.