COSMICRAY

Cosmic ray

Cosmic rays are very high-energy particles, mainly originating outside the Solar System. They may produce showers of secondary particles that penetrate and impact the Earth's atmosphere and sometimes even reach the surface. Composed primarily of high-energy protons and atomic nuclei, they are of mysterious origin. Data from the Fermi space telescope have been interpreted as evidence that a significant fraction of primary cosmic rays originate from the supernovae of massive stars. However, this is not thought to be their only source. Active galactic nuclei probably also produce cosmic rays.

The above text is a snippet from Wikipedia: Cosmic ray
and as such is available under the Creative Commons Attribution/Share-Alike License.

cosmic ray

Noun

  1. An energetic particle originating outside our solar system.
  2. Cosmic radiation: a stream of cosmic rays.


The above text is a snippet from Wiktionary: cosmic ray
and as such is available under the Creative Commons Attribution/Share-Alike License.

Need help with a clue?
Try your search in the crossword dictionary!