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The Large Area Telescope (LAT) is the primary science instrument on GLAST. It was developed by NASA and DOE together with institutions from France, Italy, Japan, and Sweden.

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Welcome to NASA's GLAST Mission. GLAST is NASA's next-generation gamma ray mission, designed to explore the most energetic phenomena in our universe.
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NASA Renames Observatory for Fermi, Reveals Entire Gamma-Ray Sky

Logo for Fermi Gamma ray Space Telescope Logo for the Fermi Gamma-ray Space Telescope. Credit: NASA/Sonoma State University/Aurore Simonnet
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NASA's newest observatory, the Gamma-ray Large Area Space Telescope, or GLAST, has begun its mission of exploring the universe in high-energy gamma rays. The spacecraft and its revolutionary instruments passed their orbital checkout with flying colors.

NASA announced August 26 that GLAST has been renamed the Fermi Gamma-ray Space Telescope. The new name honors Prof. Enrico Fermi (1901-1954), a pioneer in high-energy physics.

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Fermi Space Telescope: Exploring the Extreme Universe
GLAST is a powerful space observatory that will open a wide window on the universe. Gamma rays are the highest-energy form of light, and the gamma-ray sky is spectacularly different from the one we perceive with our own eyes. With a huge leap in all key capabilities, GLAST data will enable scientists to answer persistent questions across a broad range of topics, including supermassive black-hole systems, pulsars, the origin of cosmic rays, and searches for signals of new physics.

The mission is an astrophysics and particle physics partnership, developed by NASA in collaboration with the U.S. Department of Energy, along with important contributions from academic institutions and partners in France, Germany, Italy, Japan, Sweden, and the United States.

image of Galileo Galilei
History of Cosmic Discovery: Opening New Windows
An old saying goes: Those who don’t remember the past are condemned to repeat it. But research astronomers are quite content to repeat the history of their field, and for good reason.
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image of a clock
A Timeline of Gamma-Ray Astronomy
Learn more about the timeline of Gamma-Ray Astronomy.
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Artist's concept of the GLAST satellite
NASA Requests Public Suggestions to Rename GLAST Satellite
NASA announced the public will have a chance to suggest a new name for the cutting edge Gamma-ray Large Area Space Telescope observatory before it launches in mid-2008.
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ISOC meeting
SLAC's LAT Instrument Science Operations Center Prepares for the GLAST Launch
As part of their preparations for GLAST's May 16th launch, LAT collaborators rehearsed data-taking shifts with simulated data.
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GLAST spacecraft in Florida
GLAST Spacecraft Arrives in Florida to Prepare for Launch
NASA's GLAST spacecraft arrived Tuesday at the Astrotech payload processing facility near the Kennedy Space Center to begin final preparations for launch.
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the United Launch Alliance Delta II first stage is revealed
Revealing the Delta Rocket That Will be Used to Launch the Gamma-Ray Large Area Space Telescope in May.
In Hangar M on Cape Canaveral Air Force Station in Florida, the United Launch Alliance Delta II first stage is revealed after the cover was removed from the truck that delivered it.
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The GLAST shipping container enters the NRL high
GLAST Satellite Unwrapped for the Holidays
The Naval Research Laboratory in Washington received a wonderful present this year: NASA's Gamma-ray Large Area Space Telescope.
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Artist conception of GLAST
GLAST Satellite Arrives at Naval Research Lab for Testing
The Gamma-ray Large Area Space Telescope has arrived for its final round of testing at the Naval Research Laboratory (NRL) in Washington.
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image of the moon
GLAST Will Have a Check-Up by the Light of the Moon
The gently glowing moon is more than just a pretty ball in the sky—for gamma-ray astronomers, the moon could become a unique target for calibrating instruments such as the Gamma-ray Large Area Space Telescope (GLAST).
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image of the Hobby-Eberly Telescope
GLAST's Dance Card Begins to Fill: With CGRaBS and Blazars
The Gamma-ray Large Area Space Telescope (GLAST) is scheduled for launch early next year, and although it will observe a great variety of interesting high-energy sources, one type of object in particular is expected to dominate the gamma-ray sky: a special class of active galactic nuclei known as "blazars."
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GLAST Large Area Telescope rehearsal
GLAST Collaborators Rehearse Launch Activities
During the week of October 8, 2007, the researchers and engineers who will operate the LAT and analyze its data rehearsed the activities they will undertake to activate and checkout the instrument during its first 60 days of orbit.
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LAT Team members receive award
GLAST's LAT Team Members Receive Award at NASA
On Friday, October 19, 2007, the Large Area Telescope (LAT) Project awarded certificates of appreciation to the 58 members of the LAT Environmental Test team.
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An aerial image of the NOAO's Cerro Tololo Interamerican Observatory in Chile.
New NASA and NOAO Partnership to Open Doors of Cosmic Discovery
The GLAST-NOAO agreement will enable astronomers to propose for funding from GLAST to observe interesting objects in vastly different regions of the electromagnetic spectrum.
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NASA staffers in the General Dynamics clean room.
NASA's New Gamma Ray Satellite Now in 'Clean Room' Facility
NASA's Gamma ray Large Area Telescope (GLAST) lives in a "clean room" while it awaits its December launch.
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The Very Large Array
National Radio Observatory Teams With NASA Gamma-Ray Satellite
The National Radio Astronomy Observatory is teaming with NASA's upcoming Gamma-ray Large Area Space Telescope to allow astronomers to maximize their scientific payoff.
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Glast Launch
NASA's GLAST Mission One Step Closer to Launch
GLAST is one step closer to unveiling the mysteries of the high-energy universe.
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Small x
High-Energy 'Relic' Wind Reveals Past Behavior of Dead Stars
A team of astronomers announced the first catalog of a new type of gamma-ray source, a dozen clouds of “relic” radiation from dead stars.
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Thumbnail for gas cocoon story
Scientists Find High Energy Systems Hidden in 'Gas Cocoon'
Astronomers have found a new class of objects in space that may be tremendously luminous, but are enshrouded in gas cocoons.
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United States
› GLAST Mission Site
› Astrophysics Science Division at NASA's Goddard Space Flight Center
› Sonoma State University
› Space Sciences Laboratory at NASA Marshall Space Flight Center (GBM Site)
› Stanford Linear Accelerator Center (LAT Site) -- News Release
› University of California, Santa Cruz
› University of Washington
› U.S. Naval Research Laboratory

› École Polytechnique
› Laboratoire de Physique Theorique & Astroparticules (LPTA Monpellier)
› Saclay
› French National GLAST Web Site
› GLAST Web site at the Center for Nuclear Studies in Bordeaux-Gradignan

› Max Planck Institute

Italy (sites in English)
› INFN Bari University
› INFN Padova
› INFN Perugia
› INFN Pisa
› INFN Rome
› Udine

› Hiroshima University

› Sweden

GLAST Acronym List (PDF)

GLAST Science Glossary (PDF)

GLAST Brochure in French (PDF)

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GLAST Mission Q&A

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NASA Official: Brian Dunbar
Last Updated: August 28, 2008
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