Scientists Finally Uncover 100-Year Mystery Behind Ultra-Powerful Cosmic Rays
DAMPE space telescope reveals universal pattern as particles fade at exact same point, suggesting hidden rule governing galactic behavior.
After more than a century of puzzling observations, scientists have discovered a surprising universal pattern hidden within cosmic rays that could finally explain where these mysterious ultra-high-energy particles originate. Using data from the DAMPE (Dark Matter Particle Explorer) space telescope, researchers found that cosmic ray particles—ranging from tiny protons to massive iron nuclei—all begin fading away more sharply at precisely the same energy threshold, revealing what appears to be a fundamental rule governing their behavior across the galaxy.
Cosmic rays represent some of the highest energy phenomena in the known universe, carrying far more power than particles produced by even the most advanced Earth-based accelerators. Scientists believe these particles are created during the universe's most violent events, including supernova explosions, black hole jets, and pulsar emissions. Despite decades of intensive study, many fundamental questions about cosmic ray acceleration and propagation have remained unsolved.
The breakthrough came from analyzing highly precise measurements collected by DAMPE, which launched in December 2015 with major contributions from the University of Geneva's Department of Nuclear and Particle Physics. Researchers examined cosmic ray nuclei spanning the full range from lightweight protons to heavy iron atoms, discovering that every type of particle shows the same dramatic "spectral softening" behavior beyond a rigidity threshold of approximately 15 teraelectron-volts.
Andrii Tykhonov, associate professor at UNIGE and co-author of the study, explained the significance: "Cosmic rays are primarily composed of protons, but also of helium, carbon, oxygen, and iron nuclei. These particles are categorized according to their energy: low, up to a few billion electron-volts; intermediate, from a few billion to several hundred billion electron-volts; and high, from 1,000 billion electron-volts and beyond." The newly discovered pattern appears consistent across all particle types.
The findings strongly support theories suggesting that cosmic ray behavior is controlled by rigidity—a measure of how strongly a particle's trajectory resists bending by magnetic fields—rather than by energy per nucleon as some competing models proposed. The research team reports confidence levels reaching 99.999% against alternative explanations, marking a major step forward in understanding these enigmatic galactic messengers that have mystified physicists since their discovery over a century ago.
