Enlarge / Artist’s conception of a gamma-ray burst.NASA
Supernovae are some of the most energetic events in the Universe. And a subset of those involves gamma-ray bursts, where a lot of the energy released comes from extremely high-energy photons. We think we know why that happens in general terms—the black hole left behind the explosion expels jets of material at nearly the speed of light. But the details of how and where these jets produce photons are not at all close to being fully worked out.
Unfortunately, these events happen very quickly and very far away, so it’s not easy
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