NASA's Spitzer Telescope Celebrates 10 Years in Space

NASA - SPITZER Space Telescope patch.

Aug. 23, 2013

Image above: A montage of images taken by NASA's Spitzer Space Telescope over the years. Image Credit: NASA/JPL-Caltech.

Ten years after a Delta II rocket launched NASA's Spitzer Space Telescope, lighting up the night sky over Cape Canaveral, Fla., the fourth of the agency's four Great Observatories continues to illuminate the dark side of the cosmos with its infrared eyes.

The telescope studied comets and asteroids, counted stars, scrutinized planets and galaxies, and discovered soccer-ball-shaped carbon spheres in space called buckyballs. Moving into its second decade of scientific scouting from an Earth-trailing orbit, Spitzer continues to explore the cosmos near and far. One additional task is helping NASA observe potential candidates for a developing mission to capture, redirect and explore a near-Earth asteroid.

"President Obama's goal of visiting an asteroid by 2025 combines NASA's diverse talents in a unified endeavor," said John Grunsfeld, NASA's associate administrator for science in Washington. "Using Spitzer to help us characterize asteroids and potential targets for an asteroid mission advances both science and exploration."

Image above: Massive stars can wreak havoc on their surroundings, as can be seen in this new view of the Carina nebula from NASA’s Spitzer Space Telescope. Image Credit: NASA/JPL-Caltech.

Spitzer's infrared vision lets it see the far, cold and dusty side of the universe. Close to home, the telescope has studied the comet dubbed Tempel 1, which was hit by NASA's Deep Impact mission in 2005. Spitzer showed the composition of Tempel 1 resembled that of solar systems beyond our own. Spitzer also surprised the world by discovering the largest of Saturn's many rings. The enormous ring, a wispy band of ice and dust particles, is very faint in visible light, but Spitzer's infrared detectors were able to pick up the glow from its heat.

Perhaps Spitzer's most astonishing finds came from beyond our solar system. The telescope was the first to detect light coming from a planet outside our solar system, a feat not in the mission's original design. With Spitzer's ongoing studies of these exotic worlds, astronomers have been able to probe their composition, dynamics and more, revolutionizing the study of exoplanet atmospheres.

Other discoveries and accomplishments of the mission include getting a complete census of forming stars in nearby clouds; making a  new and improved map of the Milky Way's spiral-arm structure; and, with NASA's Hubble Space Telescope, discovering that the most distant galaxies known are more massive and mature than expected.

Images above: The spectacular swirling arms and central bar of the Sculptor galaxy are revealed in this new view from NASA’s Spitzer Space Telescope. Image Credit: NASA/JPL-Caltech.

"I always knew Spitzer would work, but I had no idea that it would be as productive, exciting and long-lived as it has been," said Spitzer project scientist Michael Werner of NASA's Jet Propulsion Laboratory, Pasadena, Calif., who helped conceive the mission. "The spectacular images that it continues to return, and its cutting-edge science, go far beyond anything we could have imagined when we started on this journey more than 30 years ago."

In October, Spitzer will attempt infrared observations of a small near-Earth asteroid named 2009 DB to better determine its size, a study that will assist NASA in understanding potential candidates for the agency's asteroid capture and redirection mission. This asteroid is one of many candidates the agency is evaluating.

Spitzer, originally called the Space Infrared Telescope Facility, was renamed after its launch in honor of the late astronomer Lyman Spitzer. Considered the father of space telescopes, Lyman Spitzer began campaigning to put telescopes in space, away from the blurring effects of Earth's atmosphere, as early as the 1940s. His efforts also led to the development and deployment of NASA's Hubble Space Telescope, carried to orbit by the space shuttle in 1990.

In anticipation of the Hubble launch, NASA set up the Great Observatories program to fly a total of four space telescopes designed to cover a range of wavelengths: Hubble, Spitzer, the Chandra X-ray Observatory and the now-defunct Compton Gamma Ray Observatory.

Image above: This infrared image from NASA's Spitzer Space Telescope shows the Helix nebula, a cosmic starlet often photographed by amateur astronomers for its vivid colors and eerie resemblance to a giant eye. Image Credit: NASA/JPL-Caltech/Univ.of Ariz.

"The majority of our Great Observatory fleet is still up in space, each with its unique perspective on the cosmos," said Paul Hertz, Astrophysics Division director at NASA headquarters in Washington. "The wisdom of having space telescopes that cover all wavelengths of light has been borne out by the spectacular discoveries made by astronomers around the world using Spitzer and the other Great Observatories."

Spitzer ran out of the coolant needed to chill its longer-wavelength instruments in 2009, and entered the so-called warm mission phase. Now, after its tenth year of peeling back the hidden layers of the cosmos, its journey continues.

SPITZER Space Telescope. Image Credit: NASA/JPL-Caltech

"I get very excited about the serendipitous discoveries in areas we never anticipated," said Dave Gallagher, Spitzer's project manager at JPL from 1999 to 2004, reminding him of a favorite quote from Marcel Proust: "The real voyage of discovery consists not in seeking new landscapes, but in having new eyes."

JPL manages the Spitzer Space Telescope mission for NASA's Science Mission Directorate, Washington. Science operations are conducted at the Spitzer Science Center at the California Institute of Technology in Pasadena. Data are archived at the Infrared Science Archive housed at the Infrared Processing and Analysis Center at Caltech. Caltech manages JPL for NASA. For more information about Spitzer, visit http://spitzer.caltech.edu and http://www.nasa.gov/spitzer .

Images (mentioned), Text, Credits: NASA / J.D. Harrington / JPL / Whitney Clavin.

Best regards, Orbiter.ch

SCISAT - From dawn to twilight

CSA-ASC - SCISAT-1 Mission patch / CSA-ASC - SCISAT-1 Atmospheric Chemistry Experiment (ACE) patch.

Aug. 23, 2013

SCISAT is completing 10 years in space. We are very proud of the unique measurement capabilities of this small Canadian satellite and of the large role that this space mission plays in monitoring stratospheric ozone and its associated chemistry.

Stratospheric ozone exists in a delicate balance of many chemical elements. SCISAT's solar-occultation instruments measure a wide range of gases, helping to monitor recovery of the ozone layer and address the Vienna Convention for the Protection of the Ozone Layer and the Montreal Protocol on Substances that Deplete the Ozone Layer.

The tenth anniversary of the first science data download from SCISAT will be marked by a scientific workshop at York University in October 2013!

Launched on August 12, 2003, SCISAT helps a team of Canadian and international scientists improve their understanding of the depletion of the ozone layer, with a special emphasis on the changes occurring over Canada and in the Arctic.

SCISAT/ACE: an important asset for international environmental policy

SCISAT focuses its attention in the stratosphere, where the ozone layer is located. SCISAT is providing the most accurate measurements to date of chemicals that affect ozone, which blocks the sun's biologically damaging ultraviolet radiation and prevents most of it from reaching the Earth's surface.

It measures more than 30 different molecules, which is "more thorough than anything that's up there," said Peter Bernath, a University of Waterloo chemistry professor who heads the SCISAT science team.

 CSA-ASC - SCISAT-1 in orbit

Ozone—comprised of three atoms of oxygen—is constantly being created and destroyed by natural chemical processes in the atmosphere. The amount of ozone present at any given time varies depending on the balance between the processes of creation and destruction.

Industrial activities on Earth produce chemicals— notably chlorofluorocarbons (CFCs)—that affect this balance by destroying stratospheric ozone. They not only reduce the ozone shield around the globe, they actually eat large holes in the ozone layer over the Antarctic each year, and also cause significant losses over the Arctic. In the past two decades, average ozone levels over Canada have dropped about 6%, while severe declines of 20—40% have occurred over the Arctic in the spring.

Lockheed TriStar launches Pegasus with SCISAT-1, August 12th, 2003

The Atmospheric Chemistry Experiment (ACE) on SCISAT was launched into a 650-kilometre-high, high-inclination orbit that takes it over the polar regions of the Earth, as well as tropical and mid-latitude locations. It measures chemical molecules that influence the distribution of stratospheric ozone, particularly in the Arctic. These data are making an important contribution to international environmental policy making aimed at protecting the ozone layer, such as the Montreal Protocol that bans certain CFCs.

SCISAT observations are also helping scientists better understand the effects of atmospheric chemistry, clouds and small particles (such as aerosols) on Earth's climate.

ACE measures the absorption of solar light by the atmosphere at sunrise and sunset. Different atmospheric constituents absorb different wavelengths of light in characteristic ways—a signature by which they can be identified. This technique is what allows ACE to make extremely accurate measurements.

Canada's SCISAT satellite

The trade-off for this precision is that SCISAT takes measurements in a limited number of locations. Other satellites do provide more global coverage, but their data are not as accurate. "That's why there's great value in combining the two," said Bernath.

With its instrument performing so well, SCISAT is now moving beyond its original mandate and providing excellent data related not only to ozone depletion, but also to climate change, and air quality and pollution. "There are many things we're doing now that we really didn't know we could do," Bernath said.

ACE has been used to measure the distribution of several molecules correlated with air pollution and biomass burning, providing data that complements the observations of the MOPITT satellite. "Together, they give you a picture of what's going on, and it's not a good picture. A lot of pollution that come from industrial activity travels all over the globe," Bernath noted.

ACE observations are also useful in climate studies. For example, they've shown that previously observed increases in the amount of water vapour being injected into the stratosphere have stopped. Water vapour is the most powerful natural greenhouse gas and plays a key role in the Earth's climate. "No one knew why it was increasing and we don't know why it stopped, so there are quite a few mysteries left," said Bernath.

Originally intended to last two years, ten years later the satellite is still operational and Bernath hopes it will continue to function beyond that. "It's been a real success."

SCISAT: Science team members and roles

The Canadian SCISAT mission is a partnership of universities, government, and industry. A scientific team of researchers from around the world, led by Professor Peter Bernath of the University of Waterloo is conducting in the Atmospheric Chemistry Experiment (ACE) which aims to measure and understand the chemical processes that control the distribution of ozone in the Earth's atmosphere, particularly in the northern latitudes.

Related links:

University of Waterloo: http://www.ace.uwaterloo.ca/

For more information about Canadian Space Agency (CSA-ASC), visit: http://www.asc-csa.gc.ca/index.html

Images, Text, Credits: CSA-ASC / NASA.

Greetings, Orbiter.ch

ROSCOSMOS - Russian Dnepr rocket launches with Arirang-5

ROSCOSMOS logo.

August 22, 2013

South Korea’s Arirang-5 satellite was launched on Thursday atop a Russian Dnepr rocket. The launch took place at 14:39 UTC (20:39 local time) from Site 370/13 at the Dombarovsky launch site near Russia’s border with Kazakhstan.

Russian Dnepr rocket launch

Arirang-5, or KOMPSat-5, is the fourth satellite in South Korea’s Arirang program. Arirang is also known as the Korea Multi-Purpose Satellite, or KOMPSAT, program.

Arirang-5 is a radar imaging satellite, the first to be developed and operated by South Korea. Developed by KARI, with participation from the South Korean aerospace industry, Arirang-5 is based around the satellite bus developed for Arirang-2.

Russian Dnepr rocket description

It has a fuelled mass of approximately 1,400 kilograms (3,100 lb), and is expected to function for at least five years. The spacecraft will be powered by a pair of deployable solar arrays, generating upwards of 1,400 watts. These will charge lithium ion batteries, with a capacity of around 100 amp-hours.

KOMPSat-5 spacecraft

Data will be relayed to the ground via an x-band downlink, providing a data rate in the region of 310 megabits per second. A lower data-rate s-band transceiver will be used to relay telemetry and commands between the satellite and its ground stations.

Thursday’s launch was the first Dnepr launch in two years. The next launch is scheduled for November, carrying DubaiSat-2 and twenty six secondary payloads.

For more information about Korean Aerospace Research Institute (KARI), visit: http://www.kari.re.kr

Images, Text, Credits: ROSCOSMOS / KARI.

Cheers, Orbiter.ch

Spacewalkers Install Camera Platform, Inspect Station

ISS - Expedition 36 Mission aptch / ISS - International Space Station patch.

Aug. 22, 2013

Two Russian cosmonauts wrapped up a 5-hour, 58-minute spacewalk at 1:32 p.m. EDT Thursday, completing the replacement of a laser communications experiment with a new platform for a small optical camera system, the installation of new spacewalk aids and an inspection of antenna covers.

Clad in Orlan spacesuits, Expedition 36 Flight Engineers Fyodor Yurchikhin and Alexander Misurkin began their second spacewalk within the span of a week when they opened the hatch to the International Space Station’s Pirs docking compartment at 7:34 a.m.

Image above: Flight Engineer Fyodor Yurchikhin works outside the Pirs docking compartment of the International Space Station during an Expedition 36 spacewalk. Image Credit: NASA TV.

As the two spacewalkers moved out to the first worksite on the Zvezda service module, they carried a combination EVA workstation and biaxial pointing platform upon which a small optical camera system will be installed during a future spacewalk.  After attaching the assembly  to a temporary stowage location, Yurchikhin and Misurkin removed the External Onboard Laser Communications System, which was installed on Zvezda in August 2011 during an Expedition 28 spacewalk.

Another Walk in Space for Russian Cosmonauts

With the laser communications experiment removed and temporarily stowed with its protective cover, the two spacewalkers began to install the camera platform before noticing that its base plate was not properly aligned.  Initially, Russian mission controllers told the spacewalkers to stand down on the installation, and Yurchikhin carried the platform back into the Pirs airlock. However, after determining that the alignment issue with base plate of the EVA workstation and biaxial pointing platform could be corrected after its installation, Russian flight controllers directed the spacewalkers to retrieve the platform from the airlock and install it at as planned on the starboard side of Zvezda. Two cameras, scheduled to be delivered to station aboard a Progress cargo craft in November, will be mounted on the platform during a spacewalk planned for December.

Image above: Flight Engineer Alexander Misurkin takes a look at a materials exposure experiment during an Expedition 36 spacewalk. Image Credit: NASA TV.

Misurkin and Yurchikhin then headed to various locations on Zvezda to inspect six antennas that are used to assist in providing navigation data during the rendezvous and docking of European Automated Transfer Vehicle cargo ships. The inspection involved work to check out the antenna covers and tighten screws on any loose covers. Flight Engineer Chris Cassidy observed one of the covers floating away from the station on Monday (video below), and Russian station officials wanted to determine its origin and insure that the remaining covers are secure.

Unidentified object floating outside station? Sort of...

While Yurchikhin completed the installation of some gap spanners – devices used to assist future spacewalkers in their movement from one module to another -- on the port side of Zvezda, Misurkin then headed over to the Poisk Mini-Research Module-2 where he used a test kit to collect a particulate sample from under a swath of thermal insulation near Poisk’s hatch. He also photographed a materials exposure experiment and associated cabling along Poisk.

Due to time constraints, the relocation of a foot restraint from the hull of Zvezda to the new spacewalk workstation was deferred to a later excursion.

This was the 173rd spacewalk in support of space station assembly and maintenance, the 8th in Yurchikhin’s career and the third for Misurkin.

Image above: Flight Engineers Fyodor Yurchikhin and Alexander Misurkin unfurl a Russian flag near the end of Thursday's spacewalk in commemoration of Russian Flag Day. Image Credit: NASA TV.

For the duration of Thursday’s spacewalk, Cassidy and station Commander Pavel Vinogradov were isolated to the Poisk module and their Soyuz TMA-08M spacecraft, while Flight Engineers Karen Nyberg of NASA and Luca Parmitano of the European Space Agency were free to move about the U.S. segment of the complex.

Nyberg spent much of her day working with the InSpace-3 experiment, which examines colloidal fluids classified as smart materials, transitioning to a solid-like state in the presence of a magnetic field.  The InSPACE-3 team believes the knowledge gleaned from this investigation may contribute to new technologies and new manufacturing processes based on the idea of having these nanoparticles act as self-assembling building blocks for larger structures.

Parmitano meanwhile rerouted an exhaust port on the Amine Swingbed. This technology demonstration is testing a smaller, more efficient carbon dioxide removal system. Size and efficiency are key factors as NASA begins building the Orion Multi-Purpose Crew Vehicle that will take astronauts deeper into space than ever before.

For more information about International Space Station, visit: http://www.nasa.gov/mission_pages/station/main/index.html

Images (mentioned), Video, Text, Credits: NASA / NASA TV.

Greetings, Orbiter.ch

Astronomers Use Hubble Images for Movies Featuring Space Slinky

NASA - Hubble Space Telescope patch.

Aug. 22, 2013

Astronomers have assembled, from more than 13 years of observations from NASA's Hubble Space Telescope, a series of time-lapse movies showing a jet of superheated gas -- 5,000 light-years long -- as it is ejected from a supermassive black hole.

Galaxy M87 Jet – Annotated

The movies promise to give astronomers a better understanding of how black holes shape galaxy evolution.

 Hubble Follows Spiral Flow of Black-Hole-Powered Jet or Spac

"Central, supermassive black holes are a key component in all big galaxies," said Eileen T. Meyer of the Space Telescope Science Institute in Baltimore, Md. "Most of these black holes are believed to have gone through an active phase, and black-hole powered jets from this active phase play a key role in the evolution of galaxies. By studying the details of this process in the nearest galaxy with an optical jet, we can hope to learn more about galaxy formation and black hole physics in general."

The research team spent eight months analyzing 400 observations from Hubble's Wide Field Planetary Camera 2 and Advanced Camera for Surveys. The observations, taken from 1995 to 2008, are of a black hole sitting in the center of a giant galaxy dubbed M87.

Galaxy M87 Jet – Unannotated

"We analyzed several years' worth of Hubble data of a relatively nearby spiraling jet of plasma emitted from a black hole, which allowed us to see lots of details," Meyer said. "The only reason you see the distant jet in motion is because it is traveling very fast."

Meyer found evidence that suggests the jet's spiral motion is created by a helix-shaped magnetic field surrounding the black hole. In the outer part of the M87 jet, for example, one bright gas clump, called knot B, appears to zigzag, as if it were moving along a spiral path. Several other gas clumps along the jet also appear to loop around an invisible structure.

M87 resides at the center of the neighboring Virgo cluster of roughly 2,000 galaxies, located 50 million light years away. The galaxy's monster black hole is several billion times more massive than our sun.

Compass and Scale Image for M87 Jet

The Hubble data also provided information on why the M87 jet is composed of a long string of gas blobs, which appear to brighten and dim over time.

"The jet structure is very clumpy. Is this a ballistic effect, like cannonballs fired sequentially from a cannon?" Meyer asked, "or, are there some particularly interesting physics going on, such as a shock that is magnetically driven?"

Meyer's team found evidence for both scenarios. "We found things that move quickly," Meyer said. "We found things that move slowly. And, we found things that are stationary. This study shows us that the clumps are very dynamic sources."

Magnetic Funnel Around a Supermassive Black Hole

It is too soon to tell whether all black-hole-powered jets behave like the one in M87, which is why Meyer plans to use Hubble to study three more jets. "It's always dangerous to have exactly one example because it could be a strange outlier," Meyer said. "The M87 black hole is justification for looking at more jets."

The team's results appeared Aug. 22 in the online issue of The Astrophysical Journal Letters.

For images and more information about M87's jet, visit: http://www.nasa.gov/hubble and http://hubblesite.org/news/2013/32

Images, Video, Text, Credits: NASA, ESA, E. Meyer, W. Sparks, J. Biretta, J. Anderson, S.T. Sohn, and R. van der Marel (STScI), C. Norman (Johns Hopkins University), and M. Nakamura (Academia Sinica).

Best regards, Orbiter.ch

Italy in an espresso cup

ESA - PROBA-2 Mission logo.

22 August 2013

 Proba-2's X-Cam view of Europe

This cloudless view of central and northern Italy, the snow-capped Alps and the European heartland was snapped by an experimental camera, smaller than an espresso cup, aboard ESA’s minisatellite Proba-2.

This black and white image gives a wider perspective than a standard Earth observation instrument, more like an astronaut’s eye view, but was taken at around double the altitude that human crews currently fly, at more than 700 km up.

A sequence of crater lakes can be seen along central Italy – from south to north, Lake Bracciano, the smaller Lake Vico, Lake Bolsena and Lake Trasimeno. The Apennine chain of mountains is also visible, forming the spine of the Italian peninsula. Sardinia and Corsica are viewed towards bottom left.

Beneath the curved horizon the UK and Ireland to the left, the North Sea and Denmark to the right can also be glimpsed. The image also captures the whole of Switzerland – where this image’s instrument was designed and built.

Proba-2's small X-Cam

Less than a cubic metre in size, Proba-2 focuses on observing solar activity and space weather. But it also keeps a small eye on its home world.

One of the 17 experimental technologies hosted on Proba-2 is the compact Exploration Camera, X-Cam. Housed on the underside of the satellite, the monochrome X-Cam observes in the visible and infrared with a 100° field of view.

X-Cam comes with embedded intelligence to let it judge automatically the best exposures for optimised image quality.

Similar compact imagers could in future keep watch on satellite surfaces to look out for damage or environmental effects.

Proba-2 in orbit

Swiss manufacturer Micro-Cameras & Space Exploration is due to fly cameras on ESA's Sentinel-1 Earth observation mission – launching this year – as well as the BepiColombo planetary science missions later this decade.

And in 2014 the company’s miniature imager on Rosetta’s lander should provide us with our closest view yet of a comet’s surface.

This image was acquired by Proba-2’s X-Cam on 7 June 2013.

More information / Related links:

About Proba-2: http://www.esa.int/Our_Activities/Technology/Proba_Missions/About_Proba-2

X-Cam on Proba-2: http://www.microcameras.ch/files/proba2.htm

Micro-Cameras and Space Exploration: http://www.microcameras.ch/

Images, Text, Credit: ESA / Pierre Carril / Micro-Cameras & Space Exploration.

Greetings, Orbiter.ch

NASA's Fermi Celebrates Five Years in Space, Enters Extended Mission

NASA - Fermi Gamma-ray Space Telescope logo.

Aug. 21, 2013

During its five-year primary mission, NASA's Fermi Gamma-ray Space Telescope has given astronomers an increasingly detailed portrait of the universe's most extraordinary phenomena, from giant black holes in the hearts of distant galaxies to thunderstorms on Earth.

But its job is not done yet. On Aug. 11, Fermi entered an extended phase of its mission -- a deeper study of the high-energy cosmos. This is a significant step toward the science team's planned goal of a decade of observations, ending in 2018.

NASA Fermi at Five Years

From blazars to thunderstorms, this video showcases highlights from the Fermi Gamma-ray Space Telescope's first five years in space.
Image Credit: NASA’s Goddard Space Flight Center.

"As Fermi opens its second act, both the spacecraft and its instruments remain in top-notch condition and the mission is delivering outstanding science," said Paul Hertz, director of NASA's astrophysics division in Washington.

Fermi has revolutionized our view of the universe in gamma rays, the most energetic form of light. The observatory's findings include new insights into many high-energy processes, from rapidly rotating neutron stars, also known as pulsars, within our own galaxy, to jets powered by supermassive black holes in far-away young galaxies.

The Large Area Telescope (LAT), the mission's main instrument, scans the entire sky every three hours. The state-of-the-art detector has sharper vision, a wider field of view, and covers a broader energy range than any similar instrument previously flown.

"As the LAT builds up an increasingly detailed picture of the gamma-ray sky, it simultaneously reveals how dynamic the universe is at these energies," said Peter Michelson, the instrument's principal investigator and a professor of physics at Stanford University in California.

Fermi's secondary instrument, the Gamma-ray Burst Monitor (GBM), sees all of the sky at any instant, except the portion blocked by Earth. This all-sky coverage lets Fermi detect more gamma-ray bursts, and over a broader energy range, than any other mission. These explosions, the most powerful in the universe, are thought to accompany the birth of new stellar-mass black holes.

Animation above: Fermi's portrait of the sky at energies beyond 1 GeV has steadily deepened with more data. This animation compares views of a 20-degree-wide region in the constellation Virgo after the LAT's first and fifth year of operations. Many additional strong sources (yellow, red) appear in the latest image. Image Credit: NASA/DOE/Fermi LAT Collaboration.

"More than 1,200 gamma-ray bursts, plus 500 flares from our sun and a few hundred flares from highly magnetized neutron stars in our galaxy have been seen by the GBM," said principal investigator Bill Paciesas, a senior scientist at the Universities Space Research Association's Science and Technology Institute in Huntsville, Ala.

The instrument also has detected nearly 800 gamma-ray flashes from thunderstorms. These fleeting outbursts last only a few thousandths of a second, but their emission ranks among the highest-energy light naturally occurring on Earth.

One of Fermi's most striking results so far was the discovery of giant bubbles extending more than 25,000 light-years above and below the plane of our galaxy. Scientists think these structures may have formed as a result of past outbursts from the black hole -- with a mass of 4 million suns -- residing in the heart of our galaxy.

To build on the mission's success, the team is considering a new observing strategy that would task the LAT to make deeper exposures of the central region of the Milky Way, a realm packed with pulsars and other high-energy sources. This area also is expected to be one of the best places to search for gamma-ray signals from dark matter, an elusive substance that neither emits nor absorbs visible light. According to some theories, dark matter consists of exotic particles that produce a flash of gamma rays when they interact.

This view shows the entire sky at energies greater than 1 GeV based on five years of data from the LAT instrument on NASA's Fermi Gamma-ray Space Telescope. Brighter colors indicate brighter gamma-ray sources. Image Credit: NASA/DOE/Fermi LAT Collaboration.

"Over the next few years, major new astronomical facilities exploring other wavelengths will complement Fermi and give us our best look yet into the most powerful events in the universe," said Julie McEnery, the mission's project scientist at NASA's Goddard Space Flight Center in Greenbelt, Md.

NASA's Fermi Gamma-ray Space Telescope is an astrophysics and particle physics partnership. Goddard manages the mission. The telescope was developed in collaboration with the U.S. Department of Energy's Office of Science, with contributions from academic institutions and partners in the United States, France, Germany, Italy, Japan, and Sweden.

Related Links:

Download additional graphics from NASA Goddard's Scientific Visualization Studio: http://svs.gsfc.nasa.gov/goto?11342

Media gallery: Fermi's First Five Years: http://svs.gsfc.nasa.gov/Gallery/Fermi5.html

Fermi multiwavelength observing support programs: http://fermi.gsfc.nasa.gov/ssc/observations/multi/programs.html

"NASA Goddard Astrophysicist Wins Prize for Pulsar Work" (02.04.13): http://www.nasa.gov/centers/goddard/news/features/2013/harding-rossi-prize.html

"Fermi Improves its Vision for Thunderstorm Gamma-Ray Flashes" (12.06.12): http://www.nasa.gov/mission_pages/GLAST/news/vision-improve_prt.htm

"NASA's Fermi Spots 'Superflares' in the Crab Nebula" (05.11.11): http://www.nasa.gov/mission_pages/GLAST/news/crab-flare.html

"NASA's Fermi Catches Thunderstorms Hurling Antimatter into Space" (01.10.11): http://www.nasa.gov/mission_pages/GLAST/news/fermi-thunderstorms.html

"Fermi Sees Brightest-Ever Blazar Flare" (12.08.09): http://www.nasa.gov/mission_pages/GLAST/news/brightest-blazar.html

Images (mentioned), Video (mentioned), Text, Credits: NASA's Goddard Space Flight Center / Francis Reddy.

Best regards, Orbiter.ch