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After discovering 6,000 planets outside our solar system, astronomers have found what could be the very first moon orbiting beyond our cosmic neighborhood. The Jupiter-sized object is rewriting what we thought we knew about moons.
Scientists in Chile may have spotted the first moon orbiting beyond our solar system, though this cosmic giant is so unusual it's breaking all the naming rules. The discovery opens a new chapter in our understanding of what's possible in the universe.
Astronomers may have found the first confirmed exomoon, and it's so massive it could change how we define what a moon actually is. The potential moon orbiting a distant gas giant weighs half as much as Jupiter.