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Extreme Physics Observatory Ready for Final Assembly
Scottsdale AZ (SPX) Sep 22, 2006 The primary instrument for NASA's Gamma-ray Large Area Space Telescope (GLAST) arrived at General Dynamics, Scottsdale, Ariz., on September 18 for mounting onto the spacecraft. The instrument, called the Large Area Telescope, successfully completed four months of vigorous testing last week at the U.S. Naval Research Laboratory, Washington, to ensure it can withstand the rigors of launch and operations in space. "GLAST is a remarkable undertaking, a partnership between astronomers and physicists," said Peter Michelson, GLAST principal investigator at Stanford University, Calif. "We are eagerly anticipating a new understanding of the connections between the large and small, between the most energetic phenomena in the universe and the subatomic world." The observatory will detect light billions of times more energetic than what our eyes can see or what optical telescopes can detect. Key targets include powerful particle jets emanating from enormous black holes and possibly the theorized collisions of dark matter particles. The Large Area Telescope will be at least 30 times more sensitive than previous gamma-ray detectors and will have a far greater field of view. "The Large Area Telescope is a unique and beautiful new instrument for science, and it will provide a tremendous leap forward in our ability to study the most energetic objects and phenomena in space," said Steven Ritz, project scientist at NASA's Goddard Space Flight Center, Greenbelt, Md. Unlike visible light, gamma rays are too energetic to be focused by traditional telescope mirrors onto a detector. The Large Area Telescope will employ detectors that convert incoming gamma rays into electrons and their antimatter partners, called positrons. This technique, a change of light into matter as described by Einstein's equation E=mc^2, is called pair conversion. It will enable scientists to track the direction of gamma rays and measure their energy. The Large Area Telescope was assembled at the Stanford Linear Accelerator Center in Menlo Park, Calif., from subsystems developed by an international team from Italy, Japan, France, Sweden and the United States. The second main instrument, the GLAST Burst Monitor, arrived in Scottsdale, Ariz., in July and is currently being integrated onto the spacecraft. The GLAST Burst Monitor was built at NASA's Marshall Space Flight Center, Huntsville, Ala., in collaboration with scientists from the Max Planck Institute for Extraterrestrial Physics, Garching, Germany, working with NASA through an agreement with the German Aerospace Center. GLAST is scheduled to launch from NASA's Kennedy Space Center, Fla. in fall 2007. Related Links GLAST website Stellar Chemistry, The Universe And All Within It
Hubble Finds Hundreds Of Young Galaxies In Early Universe
Baltimore MD (SPX) Sep 22, 2006Astronomers analyzing two of the deepest views of the cosmos made with NASA's Hubble Space Telescope have uncovered a gold mine of galaxies, more than 500 that existed less than a billion years after the Big Bang. These galaxies thrived when the cosmos was less than 7 percent of its present age of 13.7 billion years. This sample represents the most comprehensive compilation of galaxies in the early universe, researchers said. |
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