​​Neutrinos Linked With Cosmic Source for the First Time

High-energy neutrinos have been traced back to a flaring supermassive black hole known as a blazar. The long-sought link opens the door to an entirely new way to study the universe.
Neutrinos, though infamously difficult to detect, offer a key advantage over observations with light: The universe is essentially opaque to electromagnetic radiation above a certain energy. High-energy neutrinos, on the other hand, zip across the cosmos unimpeded. When they are caught, the original information they carry remains intact, no matter how far they have had to travel. Scientists hope that with enough neutrinos, they’ll be able image their sources — including the most energetic events in the universe — just like we do with electromagnetic radiation.

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