First-ever 'superkilonova' double star explosion puzzles astronomers

Scientists detected a groundbreaking cosmic event called AT2025ulz where a massive dying star appears to have split into two neutron stars that immediately crashed back together, creating the first-ever "superkilonova." This double explosion combined a supernova and kilonova, producing gravitational waves and forging heavy elements like gold while displaying unusual light patterns that initially puzzled astronomers. The discovery challenges current stellar physics since one neutron star weighed less than our sun, which shouldn't be possible under normal conditions.