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.

Scientific signal separates durable discovery from noise — and often foreshadows policy and product.

Nature reported on this under science. RedScroll surfaces the signal with an extractive brief — not a reprint of the original article. Read the source for full reporting.