Scientists Uncover Hidden Universal Rule Behind Cosmic Rays After 100-Year Mystery
DAMPE space telescope reveals that all cosmic ray particles follow the same fading pattern, potentially solving century-old puzzle about their origins.
Scientists studying mysterious ultra-powerful cosmic rays have uncovered a surprising hidden pattern that could finally help explain where these particles come from after more than a century of investigation. Using the DAMPE (Dark Matter Particle Explorer) space telescope, researchers discovered that cosmic ray particles ranging from tiny protons to heavy iron nuclei all begin fading away more sharply at the exact same point, revealing what appears to be a universal rule governing their behavior across the galaxy.
Cosmic rays represent some of the highest energy particles ever observed in nature, carrying far more energy than particles produced by even the most advanced accelerators on Earth. Scientists believe these extraordinary particles are created by some of the universe's most violent events, including supernova explosions, jets from black holes, and pulsars. Despite decades of intensive research, many fundamental questions about where cosmic rays originate and how they achieve such incredible energies have remained unanswered.
The breakthrough came from analyzing highly precise data collected by the DAMPE space telescope, which was launched in December 2015 to investigate cosmic rays and explore possible connections to dark matter. Researchers from the University of Geneva and other institutions discovered a universal pattern in the energy spectra of primary cosmic ray nuclei. "Cosmic rays are primarily composed of protons, but also of helium, carbon, oxygen, and iron nuclei," explains Andrii Tykhonov, associate professor at the University of Geneva and co-author of the study.
The research revealed that for every type of nucleus studied, the number of particles begins dropping much faster after reaching a rigidity threshold of roughly 15 teraelectron-volts. Scientists refer to this dramatic change as "spectral softening." Rigidity describes how strongly a particle's path resists being bent by magnetic fields, and the discovery that this same feature appears across many different types of particles strongly supports theories about how cosmic rays are accelerated and move through space.
The findings, published in Nature, largely rule out competing explanations based on energy per nucleon, with researchers reporting a confidence level against those alternative models reaching 99.999%. The universal pattern suggests that cosmic ray acceleration and propagation are controlled by rigidity rather than other particle properties. This discovery represents a major step forward in understanding one of the most energetic phenomena in the universe and could help scientists finally solve the century-old mystery of cosmic ray origins.
