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Zheng Y, Ma W, Dong L, Dou JR, Gao Y, Xue J

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Authors not listed · 2017

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Cosmic rays deliver millions of times more electromagnetic energy than cell phones, providing natural perspective on everyday EMF exposure levels.

Plain English Summary

Summary written for general audiences

Chinese researchers used the Dark Matter Particle Explorer satellite to directly measure high-energy cosmic ray electrons and positrons from space, detecting particles with energies up to 4.6 teraelectronvolts. They found a clear break in the energy spectrum at 0.9 teraelectronvolts, confirming previous indirect measurements. This research helps scientists understand cosmic ray sources and potentially detect dark matter signatures.

Why This Matters

While this study focuses on cosmic ray detection rather than EMF health effects, it highlights an important reality about our electromagnetic environment. We're constantly exposed to high-energy cosmic radiation from space, including these teraelectronvolt-level particles that dwarf the energy levels of everyday EMF sources. The DAMPE satellite's measurements show cosmic rays delivering energy levels millions of times higher than cell phones or WiFi. This cosmic background radiation has existed throughout human evolution, yet we've developed sophisticated biological repair mechanisms to handle it. What this means for you is perspective on EMF exposure levels. The radiofrequency radiation from your devices operates at energy levels far below what your body already manages from natural cosmic sources every day.

Exposure Information

Specific exposure levels were not quantified in this study.

Cite This Study
Unknown (2017). Zheng Y, Ma W, Dong L, Dou JR, Gao Y, Xue J.
Show BibTeX
@article{zheng_y_ma_w_dong_l_dou_jr_gao_y_xue_j_ce4616,
  author = {Unknown},
  title = {Zheng Y, Ma W, Dong L, Dou JR, Gao Y, Xue J},
  year = {2017},
  doi = {10.1038/nature24475},
  
}
DOI: 10.1038/nature24475PubMed: 29186110

Quick Questions About This Study

The Dark Matter Particle Explorer measured cosmic ray electrons and positrons with energies ranging from 25 gigaelectronvolts up to 4.6 teraelectronvolts, representing extremely high-energy electromagnetic radiation from space that constantly reaches Earth's atmosphere.
Cosmic ray particles carry energy levels millions of times higher than cell phone radiofrequency radiation. While phones operate at milliwatt power levels, cosmic rays deliver teraelectronvolt energies, providing natural perspective on everyday EMF exposure.
The spectral break at 0.9 teraelectronvolts likely reflects changes in cosmic ray acceleration mechanisms or propagation effects through the galaxy. This energy threshold helps scientists understand the physical processes generating these high-energy particles.
Direct measurement by DAMPE provides higher energy resolution and lower background interference compared to ground-based telescopes that detect cosmic rays indirectly through atmospheric particle showers, offering more precise data about the energy spectrum.
The measured cosmic ray spectrum could potentially reveal signatures of dark matter particle annihilation or decay, though the study focuses on confirming the spectral break rather than making definitive dark matter claims.