Mysterious Ultra-High-Energy Cosmic Ray Detected from Space

A rare and extremely high-energy cosmic ray, named Amaterasu, has been detected falling to Earth. Originating from an empty region of space, this discovery challenges current scientific understanding of cosmic events.

Quick Facts

  • Amaterasu Particle: Named after the Japanese sun goddess, this ultra-high-energy cosmic ray is one of the highest ever recorded, baffling scientists due to its unexpected source.
  • Source of Mystery: Tracing Amaterasu’s trajectory leads to the Local Void, an empty space near the Milky Way, which raises questions about the origins of such high-energy particles.
  • Unprecedented Energy Levels: With an energy exceeding 240 exa-electron volts (EeV), Amaterasu is second only to the Oh-My-God particle, challenging current theories of particle acceleration in the universe.

The discovery of the Amaterasu particle represents a significant milestone in astrophysics. Detected by the Telescope Array observatory in Utah, this particle exhibits energy levels millions of times greater than those produced in the largest particle accelerators on Earth. The surprising aspect of this finding is the particle’s apparent origin — the Local Void, a vast empty space neighboring the Milky Way. This contradicts the usual expectation of such particles originating from high-energy cosmic events like supernovae or black holes.

Researchers speculate on possible sources for Amaterasu’s immense energy. Theories range from unknown astronomical phenomena to unexplored aspects of particle physics. The particle’s journey through space, relatively unaffected by galactic and extragalactic magnetic fields, adds another layer of complexity to the puzzle. The discovery challenges existing models of cosmic ray production and may lead to new insights into the fundamental workings of our universe.

The ongoing expansion of the Telescope Array project is expected to provide more data on ultra-high-energy cosmic rays like Amaterasu. By increasing the observatory’s footprint, astronomers hope to capture more of these rare events, potentially unveiling new aspects of high-energy physics and contributing to our understanding of cosmic phenomena.

For Further Reading Cosmic rays are high-energy protons and atomic nuclei that travel through space at nearly the speed of light. They originate from the sun, other stars, and outside the Milky Way galaxy. Cosmic rays can affect Earth’s atmosphere and pose a challenge to space travel. For a detailed overview, visit Cosmic Ray – Wikipedia.


What are cosmic rays?
Cosmic rays are energetic particles from space, primarily protons and atomic nuclei. They originate from various cosmic sources, including the sun, supernovae, and even distant galaxies.

Why is the Amaterasu particle unique?
The Amaterasu particle is unique due to its extremely high energy and its origin from an empty region of space, challenging current scientific theories.

What does this discovery mean for science?
This discovery could lead to new understanding in particle physics and astrophysics, revealing new aspects of high-energy cosmic events and particle acceleration.

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