cosmic rays

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"Shadow Bomber" Galaxy May Explain Part of the Origin of Cosmic Neutrinos

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A high-energy neutrino event has led astronomers to a distant, dusty galaxy. ALMA observations and gravitational lensing have revealed a compact core where intense star formation is taking place, potentially turning the galaxy into a natural particle accelerator.
Artist's impression of a blazar – an active core of a galaxy, powered by a supermassive black hole and emitting a powerful jet of plasma. Credit: M. Weiss/CfA

The source of the most energetic neutrino ever discovered may be surprising

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Research by the KM3NeT collaboration suggests that the extreme neutrino detected in the Mediterranean Sea in 2023 did not come from a single event, but rather from a diffuse flux of particles generated in a population of active galactic nuclei known as blazars.
A map of the sky created by the Gaia space telescope. (credit: ESA)

Milky Way neutrino roadmap could guide hunt for galactic sources

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New model ranks regions in the galaxy where high neutrino flux is expected, in the context of massive stars and interstellar gas
Prof. Kyle Kramer, New York University. Photo: Avi Blizovsky

Turn your mobile phone into a cosmic particle detector

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The orbit of the Voyager 2 spacecraft. The local interstellar cloud is marked with yellow lines. Illustration: American Museum of Natural History

What holds the interstellar cloud in place? The mystery is solved

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As the sun weakens, cosmic radiation at flight altitude strengthens

Cosmic rays are too weak to affect the climate

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