A supernova's biggest energy burst is invisible
In a core-collapse supernova, the bright flash is only part of the story. More than 99% of the energy rushes away as neutrinos in the first few minutes.Supernova Neutrinos: The Invisible Blast
The core falls inward incredibly fast
When a massive star's core can no longer resist gravity, it can collapse inward at about 70,000 km/s. If enough matter remains packed together, the collapse can stop and form a newborn neutron star.Supernova Neutrinos: The Invisible Blast
