Cosmic rays seen at Earth show a wide range of particle energies, from 107 electron-volts (eV) to more than 1020 eV, the latter being about the same as the kinetic energy of a 450 gram football ...

A fuzzy smudge of light visible from the Southern Hemisphere, the Large Magellanic Cloud looks modest to the naked eye. But ...

The international cosmic ray observation mission reveals a key feature of these rays, marking a major advance in ...

Scientists have detected changes in cosmic rays that could reveal the true origin of these extreme particles in the universe.

Fading candle: remnant of a type Ia supernova called SNR 0509-67.5. (Courtesy: NASA/CXC/SAO/J Hughes et al/ESA/Hubble Heritage Team) The mysterious substance known as dark energy thought to be pushing ...

New York University physicist Georgi Dvali concludes that the cosmic acceleration of the universe may be caused by the modification of standard laws of gravity at very large distances, and not by &#34 ...

In all directions of the sky, cosmic rays rocket through space with incredible speed. These "rays"—which mostly consist of protons—are some of the most energetic particles in the universe. For nearly ...

“Dark energy,” a mysterious force that counters gravity, has been proposed to explain why the universe is expanding at an accelerating rate. Mathematicians at UC Davis and the University ...

Cosmic rays are relativistic charged particles that pervade the Galaxy and beyond, carrying crucial information about violent astrophysical processes and influencing the dynamics of interstellar and ...

This time ten years ago, two independent teams of researchers in the US were deliberating over whether to go public with a discovery that would change our view of the universe forever. It concerned ...

If it’s possible to make a mystery more mysterious, then a study of dark energy by astronomer Bradley Schaefer of Louisiana State University in Baton Rouge may have done so. Earlier this month, at the ...