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The new cosmic ray was detected by the Telescope Array experiment, which brings together 507 different stations in a grid of in the Utah desert to detect cosmic rays and other phenomena.
Stone tools unearthed in Ukraine were last used 1.4 million years ago, according to research that dated the tools using particles inside rock made by cosmic rays.
The magnitude of the energy of cosmic ray flux in interstellar space is very comparable to that of other deep space energies: cosmic ray energy density averages about one electron-volt per cubic centimetre of interstellar space, or ≈1 eV/cm 3, which is comparable to the energy density of visible starlight at 0.3 eV/cm 3, the galactic magnetic ...
Previously reported extremely high-energy cosmic ray events include a 320 EeV particle in 1991 [5] (Oh-My-God particle), a 213 EeV particle in 1993 [6] [1] and a 280 EeV particle in 2001. [7] This makes the Amaterasu particle the third most powerful cosmic ray to have been detected.
The flux of cosmic rays is approximately proportional to 1/(E a) where E is the energy and a is somewhere between 2 and 3 up to the UHECR limit. Cosmic rays created in our galaxy with energy of less than about 10 18 eV get trapped by the galaxy's magnetic field. Particles above that should escape, so high energy cosmic rays would likely come ...
Cosmic ray astronomy is a branch of observational astronomy where scientists attempt to identify and study the potential sources of extremely high-energy (ranging from 1 MeV to more than 1 EeV) charged particles called cosmic rays coming from outer space.
The Oh-My-God particle was an ultra-high-energy cosmic ray detected on 15 October 1991 by the Fly's Eye camera in Dugway Proving Ground, Utah, United States. [1] [2] [3] As of 2025, it is the highest-energy cosmic ray ever observed. [4] Its energy was estimated as (3.2 ± 0.9) × 10 20 eV (320 exa-eV). The particle's energy was unexpected and ...
The energy spectrum for cosmic rays. Extragalactic cosmic rays are very-high-energy particles that flow into the Solar System from beyond the Milky Way galaxy. While at low energies, the majority of cosmic rays originate within the Galaxy (such as from supernova remnants), at high energies the cosmic ray spectrum is dominated by these extragalactic cosmic rays.