Hiroki Nagakura

A dying star is like a high-rise building collapsing in on itself. The core compresses to unimaginable density, while the outer layers fall onto it at speeds of tens of thousands of kilometers per second. At that moment, neutrinos are born — particles that barely notice ordinary matter and carry energy away.

Neutrinos are tiny particles that barely interact with matter. They pass straight through a star like bullets through fog. When a massive star is gearing up to explode, its core contracts, temperatures soar, and neutrinos start streaming out.

When a massive star dies, its core collapses, and a neutrino storm is born. These ghostly particles fly outward, changing their flavor along the way, like a chameleon changes color. This dance of flavors can either boost the explosion or, conversely, dampen it. But this dance has a choreographer — the density gradients of matter.