Latest Greisen–Zatsepin–Kuzmin limit Stories

New Cosmic Ray Telescope Hosted By Space Station
2013-03-12 15:44:52

University of Chicago The National Aeronautics and Space Administration has awarded $4.4 million to a collaboration of scientists at five United States universities and NASA´s Marshall Space Flight Center to help build a telescope for deployment on the International Space Station in 2017. The U.S. collaboration is part of a 13-nation effort to build the 2.5-meter ultraviolet telescope, called the Extreme Universe Space Observatory. UChicago Prof. Angela Olinto leads the U.S....

2009-10-28 13:25:00

During its first year of operations, NASA's Fermi Gamma Ray Space Telescope mapped the extreme sky with unprecedented resolution and sensitivity. It captured more than 1,000 discrete sources of gamma rays -- the highest-energy form of light. Capping these achievements was a measurement that provided rare experimental evidence about the very structure of space and time, unified as space-time in Einstein's theories. "Physicists would like to replace Einstein's vision of gravity -- as expressed...

2007-12-17 12:05:00

With its powerful detectors, Integral has performed the most-sensitive all-sky survey ever, finding expected clumpy areas at large scales in our local universe. Scientists working with ground-based telescopes have found the same local clumps, while looking for sources of cosmic showers. Integral performed the survey in the hard X-ray band of the electromagnetic spectrum. Although it wasn't the first such survey, Integral's strength lies in the fact that it is unbiased towards sources that are...

2007-11-12 00:00:00

ARGONNE, Ill. "“ Ultra-high-energy particles from just outside enormous, active black holes in nearby galaxies travel as far as 250 million light years to make it all the way to Earth, an international team of 400 physicists and astronomers from 17 countries reports in the Nov. 9 issue of the journal Science. "This is the dawn of a new type of astronomy, the beginning of ultra-high-energy-charged particle astronomy," said physics professor Katsushi Arisaka, who led the UCLA research...

Word of the Day
  • A punctuation mark (/) used to separate related items of information.
  • A little rod; a twig.
This word comes from the Late Latin 'virgula,' accentual mark, a diminutive of 'virga,' rod.