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Astronomy

The Cosmic Neutrino Background and Its Detection Challenges at Low Energies

Quick fact

There are about 330 cosmic relic neutrinos in every cubic centimeter of the universe, yet scientists have never directly detected them because they are extremely low-energy and interact so rarely with matter.

Why this is interesting

You've heard of the cosmic microwave background, but did you know there's an invisible background of particles left over from the Big Bang that we still haven't directly detected? What are these particles, and why are they so elusive?

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The Cosmic Neutrino Background and Its Detection Challenges at Low Energies

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