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Last updated on April 18, 2014 at 1:21 EDT

Latest High Energy Stereoscopic System Stories

Cosmic Ray Origins Still A Mystery
2012-08-01 05:01:58

April Flowers for redOrbit.com - Your Universe Online In August, physicists will gather to celebrate a century of research since the discovery of cosmic rays. It is widely accepted that cosmic rays are the nuclei of atoms, from the full array of naturally occurring elements that travel at near-light-speeds for millions of years before reaching Earth. What isn't known yet is where these cosmic rays originate. Alan Watson, emeritus professor of physics at the University of Leeds, provides...

2011-05-19 12:41:00

NEW YORK, May 19, 2011 /PRNewswire/ -- Hess Corporation today announced the newest addition to the company's Miniature Truck series - a limited edition helicopter transporter. Each year, the Miniature Truck series pays tribute to a popular Hess holiday Toy Truck from the past. This year's edition, a small-scale replica of the popular 2001 Hess holiday Helicopter, features: Two motorized spinning rotors. Internal and external lights. A quick-release display base. The 2011 Hess...

2010-11-30 13:42:00

NEW YORK, Nov. 30, 2010 /PRNewswire/ -- Hess Corporation is introducing a virtual new chapter to its 46-year-old Hess Toy Truck holiday tradition with the launch of its first-ever interactive game, the Hess Jet Game. Based on the 2010 Hess Toy Truck and Jet, the Hess Jet Game takes the Hess Toy Truck to a whole new level, providing fans with a highly-engaging online gaming experience for free. "The Hess Jet Game is another way for us to offer consumers extra value, with a free game...

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2009-12-07 11:25:00

Washington University physicists are closing in on the origin of cosmic rays A thin rain of charged particles continually bombards our atmosphere from outer space. The mysterious particles were first detected 100 years ago but until 10 years ago when a new type of telescope began to come online physicists weren't sure where the "cosmic rays" came from or how they were generated. They suspected the particles were accelerated by supernova shockwaves, but suspicions aren't proof. Imaging...

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2009-10-03 11:13:58

Quite a few distant galaxies turn out to be cosmic delivery rooms. Large numbers of massive stars are born in the hearts of these starburst galaxies, and later explode as supernovae. In the remnants they leave behind, particles are accelerated to very high energies. Astrophysicists have now used the H.E.S.S. telescopes to make detailed measurements of the gamma rays from the NGC 253 galaxy. As predicted, these high-energy rays originate from the region of maximum supernova activity close to...

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2009-04-24 13:35:00

The largest-ever gamma-ray telescope is set to collect its "first light" at an opening ceremony on Saturday. Located on the island of Palma, the Major Atmospheric Gamma-ray Imaging Cerenkov Magic II will replace its predecessor, the Magic telescope. When it was built, the first Magic telescope was the largest gamma-ray telescope in the world, until 2003, when the four-telescope High-energy Stereoscopic System (Hess) was unveiled. Now, Magic's successor will reclaim the title once more, but...

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2009-03-19 09:50:00

An international team of astrophysicists using telescopes on the ground and in space have uncovered surprising changes in radiation emitted by an active galaxy. The picture that emerges from these first-ever simultaneous observations with optical, X-ray and new-generation gamma-ray telescopes is much more complex than scientists expected and challenges current theories of how the radiation is generated. The galaxy in question is PKS 2155-304, a type of object known as a "blazar." Like many...

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2007-12-20 16:14:54

By working in synergy with a ground-based telescope array, the joint Japanese Aerospace Exploration Agency (JAXA)/NASA Suzaku X-ray observatory is shedding new light on some of the most energetic objects in our galaxy, but objects that remain shrouded in mystery. These cosmic powerhouses pour out vast amounts of energy, and they accelerate particles to almost the speed of light. But very little is known about these sources because they were discovered only recently. "Understanding these...

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2007-02-06 08:06:34

A team of astronomers from France and South Africa announced the first catalog of a new type of gamma-ray source, a dozen clouds of "relic" radiation from dead stars that reveal information about the energetic past of these celestial objects. These findings were presented on Feb. 5, 2007 at the first Gamma Ray Large-Area Space Telescope (GLAST) scientific Symposium meeting in Palo Alto, Calif., by Dr. Arache Djannati-Ataï, an astrophysicist from the Astroparticle...

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2006-02-28 08:55:00

ESA -- Astronomers have witnessed a never-seen-before event in observations by ESA's XMM-Newton spacecraft -- a collision between a pulsar and a ring of gas around a neighbouring star. The rare passage, which took the pulsar plunging into and through this ring, illuminated the sky in gamma- and X-rays. It has revealed a remarkable new insight into the origin and content of 'pulsar winds', which has been a long-standing mystery. The scientists described the event as a natural but...