In space instrument parlance, activation refers to the detailed sequence of commissioning and checkout procedures needed to verify that a spacecraft and its instruments are working as intended after launch. Two years ago today, the Large Area Telescope onboard the Fermi Gamma-ray Space Telescope spacecraft successfully completed activation. read more...

Today marks the start of the Fermi Gamma-ray Space Telescope's third year in space. read more...

The first catalog of high-energy gamma-ray sources detected by the Large Area Telescope on the Fermi Gamma-ray Space Telescope has been published online. read more...

A new study of the ever-present fog of gamma rays from sources outside our galaxy shows that less than a third of the emission arises from what astronomers once considered the most likely suspects. read more...

New images from the Fermi Gamma-ray Space Telescope show where supernova remnants emit radiation a billion times more energetic than visible light. The images bring astronomers a step closer to understanding the source of some of the universe’s most energetic particles–cosmic rays. read more...

The high-energy cosmic rays appear to be coming from supernova remnants, the dying remains of exploded stars; the new result reveals the spatial distribution of this emission in one particular supernova remnant. read more...

Radio astronomers have uncovered 17 millisecond pulsars in our galaxy by studying unknown high-energy sources detected by NASA's Fermi Gamma-ray Space Telescope. read more...

Two so-called "starburst" galaxies, plus a satellite of our own Milky Way galaxy, represent a new category of gamma-ray-emitting objects detected both by Fermi and ground-based observatories. read more...

Today at the 2009 Fermi Symposium in Washington DC, postdoctoral researcher Lucas Guillemot of the Max Planck Institute reported that the Fermi Gamma-ray Space Telescope has detected eight more pulsars that had not been seen in other wavelengths of light. read more...

Just over a year after the Fermi Gamma-ray Space Telescope began taking science data, the collaboration is celebrating its many noteworthy results. read more...

During its first year of operations, NASA's Fermi Gamma Ray Space Telescope mapped the extreme sky with unprecedented resolution and sensitivity. 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. read more...

When the telescope's Gamma-ray Burst Monitor caught the bright flash of gamma rays, the Fermi spacecraft rotated so that its main instrument, the Large Area Telescope, could get a closer look. read more...

For the second time in as many years, a Large Area Telescope collaboration meeting was punctuated by a stellar firework. read more...

Today, the collaboration and the Fermi mission makes the first year of LAT gamma-ray data publicly available. read more...

The Fermi Gamma-ray Space Telescope might be able to find dark matter in our galaxy, and soon, if new predictions prove true. read more...

In two papers published in the July 2 edition of Science Express, researchers reported a new class of pulsar and evidence that helps explain how gamma-ray emission occurs. read more...

The Fermi Gamma-ray Space Telescope is filling in the picture of gamma-ray emissions from other galaxies. read more...

New data from the Fermi Gamma-ray Space Telescope show at least some gamma-ray bursts have much more staying power than previously thought. read more...

Something in our galactic neighborhood seems to be producing large numbers of high-energy electrons, according to new data gathered by the Fermi Gamma-ray Space Telescope. read more...

When it comes to watching the skies, two sets of eyes are always better than one, especially if one pair can see, say, radio waves, while the other has X-ray or even gamma-ray vision. read more...

An international team of astrophysicists using telescopes on the ground and in space have uncovered surprising changes in radiation emitted by an active galaxy. read more...

The Fermi Gamma-ray Space Telescope today released a three-month sky-map of the gamma-ray sky and a list of the ten most interesting gamma-ray sources they have observed. read more...

With the greatest total energy, the fastest motions, and the highest-energy initial emissions ever before seen, a gamma-ray burst recently observed by the Fermi Gamma-ray Space Telescope is one for the record books. read more...

Four months into its mission, the Fermi Gamma-ray Space Telescope has discovered 12 never-before-seen pulsars and observed gamma-ray pulses from 18 others, shedding new insight on the high-energy universe. read more...

About three times a second, a 10,000-year-old stellar corpse sweeps a beam of gamma-rays toward Earth. This object, known as a pulsar, was discovered by the Fermi Gamma-ray Space Telescope. read more...

The U.S. Department of Energy (DOE) and NASA announced today that the Gamma-Ray Large Area Space Telescope (GLAST) has revealed its first all-sky map in gamma rays. read more »

As the Gamma-ray Large Area Space Telescope (GLAST) rocketed gloriously from the launch pad on June 11, it faded into the blue sky and out of sight. But GLAST isn't totally out of view: you can still see it soaring overhead in the southwest sky many nights. read more »

After their journey into the cold reaches of space, instruments on GLAST have been woken up ready to begin operations. read more »

No glow of laptops aided latecomers who picked their way through the darkened aisles of Stanford Linear Accelerator's Panofsky auditorium on Monday. read more »

A video of the GLAST launch, courtesy of NASA... watch the video »

GLAST successfully launched aboard a Delta II rocket from Cape Canaveral Air Force Station in Florida at 12:05 p.m. EDT today... read more »

The Delta II rocket easily lifted the GLAST spacecraft off the launch pad, out of the smoke and clouds and into a beautiful clear-blue Florida sky... read more »

NASA has set no earlier than June 11 as the new target launch date for the Gamma-ray Large Area Space Telescope, or GLAST, from Cape Canaveral Air Force Station in Florida. read more »

The Delta II 7920-H rocket that will launch the Gamma-ray Large Area Telescope (GLAST) satellite is in the process of being assembled... read more »

NASA's GLAST) arrived last week at the Astrotech payload processing facility near the Kennedy Space Center... read more »

The first stage of the Delta II rocket that will be used to launch the GLAST into space has arrived at Hangar M... read more »

NASA announced yesterday that members of the general public from around the world will have a chance to suggest a new name for the cutting edge GLAST... read more »

The GLAST Observatory is scheduled to launch in May of this year, but the design of the Large Array Telescope (LAT) instrument has already earned... read more »

Everyone likes getting high-tech presents for the holidays, and the Naval Research Laboratory in Washington received a special present this year... read more »

The Gamma-ray Large Area Space Telescope (GLAST) has arrived at the Naval Research Laboratory (NRL) in Washington, for its final round of testing... read more »

The primary instrument for the GLAST mission, the Large Area Telescope (LAT), will detect gamma rays with unprecedented sensitivity... read more »

The operations center for the Large Area Telescope (LAT) at SLAC will be ready when GLAST is launched into orbit next spring... read more »

GLAST is scheduled for launch early next year, and although it will observe a great variety of interesting high-energy sources... read more »

Gamma rays are a form of light at the highest end of the energy spectrum and are created in the hottest regions of the universe... read more »

Thanks to the work of a team of physicists at SLAC, a technique used for years in physics experiments such as BaBar will soon help researchers... read more »

The astrophysics community enthusiastically awaits the upcoming launch of GLAST, the latest and most powerful gamma-ray telescope. But interpreting... read more »

The next major space observatory, GLAST, is one step closer to unveiling the mysteries of the high-energy universe... read more »

The identity of dark matter—the mysterious stuff that makes up a quarter of the universe—continues to elude scientists... read more »

When GLAST rockets into orbit later this year, a group of people will be monitoring and commanding the Large Area Telescope (LAT) instrument... read more »

On December 8, a crane lifted the Large Area Telescope (LAT) onto the Gamma-ray Large Area Space Telescope (GLAST) spacecraft, bringing... read more »

Until now, gamma-rays emitted directly from the sun have been detected only during rare intense solar flares. However, a paper to be published... read more »

By the time the Large Area Telescope (LAT) begins orbiting the earth next fall, it will already be a seasoned traveler. Between its birth at SLAC... read more »

When GLAST flies into space in Fall 2007, SLAC will be ready, thanks to the LAT Instrument Science Operations Center (ISOC)... read more »

The Large Area Telescope (LAT) instrument successfully survived an onslaught of outer space and launch conditions at the Naval Research Laboratory... read more »

SLAC's involvement with the Large Area Telescope (LAT) didn't end the day it left the lab. In mid-May, when the telescope arrived at the Naval... read more »

With a potluck and much good cheer, SLAC's GLAST Collaboration gathered last Friday to mark the shipping of the Large Area Telescope (LAT)... read more »

When the task is to find gamma ray photons in outer space, where they are outnumbered 10,000 to 1 by charged particles, it helps... read more »

Roughly once a day, the universe is rocked by mighty explosions. We don't fully understand what causes the explosions, but we can detect the results... read more »

Twenty-two months from now, the GLAST satellite, a complicated and sturdy set of particle physics detectors, will be encapsulated into the cone... read more »

The GLAST team celebrated the installation of the 16th—and last—detector tower into the instrument this week. This telescope forms an image of the... read more »

GLAST has started to take physical shape with the installation of the second tracking tower last month. Now the team can perform the first tests ever... read more »

Peeking through the glass doors of a room in Bldg. 84, the occasional passer-by puzzles at a giant, revolving electronics contraption skewered on... read more »

Making sense of the data coming from the Large Area Telescope (LAT), one of two main instruments of the GLAST mission, will take highly trained eyes... read more »

The Large Area Telescope (LAT) project, a key component of GLAST, recently sailed through its first phase of testing with great success. Conducted at SLAC... read more »