SOUTH POLE TELESCOPE HELPS EXPLAIN MYSTERIOUS DARK MATTER

FROM NATIONAL SCIENCE FOUNDATION
Credit: Daniel Luong-Van, National Science Foundation

NSF-funded 10-meter South Pole Telescope in Antarctica provides new support for the most widely accepted explanation of dark energy, the source of the mysterious force that is responsible for the accelerating expansion of the universe.

April 2, 2012
Analysis of data from the National Science Foundation- (NSF) funded 10-meter South Pole Telescope (SPT) in Antarctica provides new support for the most widely accepted explanation of dark energy, the source of the mysterious force that is responsible for the accelerating expansion of the universe.

The results begin to hone in on the tiny mass of the neutrinos, the most abundant particles in the universe, which until recently were thought to be without mass.
The SPT data strongly support Albert Einstein's cosmological constant--the leading model for dark energy--even though researchers base the analysis on only a fraction of the SPT data collected and only 100 of the over 500 galaxy clusters detected so far.
"With the full SPT data set we will be able to place extremely tight constraints on dark energy and possibly determine the mass of the neutrinos," said Bradford Benson, an NSF-funded postdoctoral scientist at the University of Chicago's Kavli Institute for Cosmological Physics.

Benson presented the SPT collaboration's latest findings, Sunday, April 1, at the American Physical Society meeting in Atlanta.

These most recent SPT findings are only the latest scientifically significant results produced by NSF-funded researchers using the telescope in the five years since it became active, noted Vladimir Papitashvili, Antarctic Astrophysics and Geospace Sciences program director in NSF's Office of Polar Programs.

"The South Pole Telescope has proven to be a crown jewel of astrophysical research carried out by NSF in the Antarctic," he said. "It has produced about two dozen peer-reviewed science publications since the telescope received its 'first light' on Feb. 17, 2007. SPT is a very focused, well-managed and amazing project."

The 280-ton SPT stands 75 feet tall and is the largest astronomical telescope ever built in the clear and dry air of Antarctica. Sited at NSF's Amundsen-Scott South Pole station at the geographic South Pole, it stands at an elevation of 9,300 feet on the polar plateau. Because of its location at the Earth's axis, it can conduct long-term observations.

NSF manages the U.S. Antarctic Program through which it coordinates all U.S. scientific research on the southernmost continent and aboard ships in the Southern Ocean as well as providing the necessary related logistics support.

An international research collaboration led by the University of Chicago manages the South Pole Telescope. The collaboration includes research groups at Argonne National Laboratory; Cardiff University in Wales; Case Western Reserve University; Harvard University; Ludwig-Maximilians-Universität in Germany; the Smithsonian Astrophysical Observatory; McGill University in Canada; the University of California, Berkeley; the University of California, Davis; the University of Colorado Boulder; and the University of Michigan, as well as individual scientists at several other institutions.

SPT specifically was designed to tackle the dark-energy mystery. The 10-meter telescope operates at millimeter wavelengths to make high-resolution images of Cosmic Microwave Background (CMB) radiation, the light left over from the big bang.

Scientists use the CMB to search for distant, massive galaxy clusters that can be used to pinpoint the properties of dark energy and also help define the mass of the neutrino.
"The CMB is literally an image of the universe when it was only 400,000 years old, from a time before the first planets, stars and galaxies formed in the universe," Benson said. "The CMB has travelled across the entire observable universe, for almost 14 billion years, and during its journey is imprinted with information regarding both the content and evolution of the universe."

The new SPT results are based on a new method that combines measurements taken by the telescope and by NASA and European Space Agency X-ray satellites, and extends these measurements to larger distances than previously achieved.

The most widely accepted property of dark energy is that it leads to a pervasive force acting everywhere and at all times in the universe. This force could be the manifestation of Einstein's cosmological constant that assigns energy to space, even when it is free of matter and radiation.

Einstein considered the cosmological constant to be one of his greatest blunders after learning that the universe is not static, but expanding.

In the late 1990s, astronomers discovered the universe's expansion appears to be accelerating according to cosmic distance measurements based on the relatively uniform luminosity of exploding stars. The finding was a surprise because gravity should have been slowing the expansion, which followed the big bang.

Einstein introduced the cosmological constant into his theory of general relativity to accommodate a stationary universe, the dominant idea of his day. But his constant fits nicely into the context of an accelerating universe, now supported by countless astronomical observations.

Others hypothesize that gravity could operate differently on the largest scales of the universe. In either case, the astronomical measurements point to new physics that have yet to be understood.

As the CMB passes through galaxy clusters, the clusters effectively leave "shadows" that allow astronomers to identify the most massive clusters in the universe, nearly independent of their distance.

"Clusters of galaxies are the most massive, rare objects in the universe, and therefore they can be effective probes to study physics on the largest scales of the universe," said John Carlstrom, the S. Chandrasekhar Distinguished Service Professor in Astronomy & Astrophysics, who heads the SPT collaboration.

"The unsurpassed sensitivity and resolution of the CMB maps produced with the South Pole Telescope provides the most detailed view of the young universe and allows us to find all the massive clusters in the distant universe," said Christian Reichardt, a postdoctoral researcher at the University of California, Berkeley and lead author of the new SPT cluster catalog paper.

The number of clusters that formed over the history of the universe is sensitive to the mass of the neutrinos and the influence of dark energy on the growth of cosmic structures.
"Neutrinos are amongst the most abundant particles in the universe," Benson said. "About one trillion neutrinos pass through us each second, though you would hardly notice them because they rarely interact with 'normal' matter."

The existence of neutrinos was proposed in 1930. They were first detected 25 years later, but their exact mass remains unknown. If they are too massive they would significantly affect the formation of galaxies and galaxy clusters, Benson said.

The SPT team has been able to improve estimates of neutrino masses, yielding a value that approaches predictions stemming from particle physics measurements.

"It is astounding how SPT measurements of the largest structures in the universe lead to new insights on the evasive neutrinos," said Lloyd Knox, professor of physics at the University of California at Davis and member of the SPT collaboration. Knox will also highlight the neutrino results in his presentation on Neutrinos in Cosmology at a special session of the APS on Tuesday, April 3.

NSF's Office of Polar Programs primarily funds the SPT. The NSF-funded Physics Frontier Center of the Kavli Institute for Cosmological Physics, the Kavli Foundation and the Gordon and Betty Moore Foundation provide partial support.

NASA ROBOTS SHOWCASED AT STANFORD UNIVERSITY'S 'ROBOT BLOCK PARTY'

MOFFETT FIELD, Calif. – Two cutting-edge NASA prototype robots will be
featured during a "Robot Block Party" at Stanford University,
Stanford, Calif. from 1 – 6 p.m. PDT, Wednesday, April 11, 2012. The
Center for Internet and Society at Stanford Law School is hosting the
free public event as part of the third annual National Robotics Week.

Robotic technology from the Intelligent Robotics Group (IRG) at NASA's
Ames Research Center, Moffett Field, Calif., will be on display,
including a volleyball-sized free-flying satellite, known as "Smart
SPHERES." Also featured will be a prototype robot based on a
dynamically-controlled "tensegrity structure" – a collection of rods
connected and suspended by tensioned cables – called "TenseBot."

The International Space Station currently houses three Synchronized
Position Hold, Engage, Reorient, Experimental Satellites (SPHERES)
equipped with a Nexus™ S Smartphone made by Samsung Electronics and
using Google’s Android™ platform. Later this year, the IRG will
remotely control the Smart SPHERES from the Mission Control Center at
NASA's Johnson Space Center, Houston. The test will simulate a mobile
inspection of the space station to see how well the free-flying
robots can collect data using the smartphone's camera and sensors.

The TenseBot will be used to explore how tensegrity structures, which
are typically built as architectural art exhibits, can be controlled
by computers. Researchers in the IRG are interested in tension-based
structures because they have great potential to save space, weight
and energy and can be used for a variety of tasks on NASA's future
space missions, including deploying antennas, aligning large payloads
and pointing solar arrays.

Other robotic technology on display at the Robot Block Party includes
robots that drive cars, climb walls, assemble delicate parts, and
help perform medical procedures.

The Robot Block Party will be held in the Volkswagen Automotive
Innovation Lab at 473 Oak Rd, off Stock Farm Rd, Stanford. Park in
Parking Structure 5, or adjacent lots.

National Robotics Week is organized by the Robotics Caucus of the U.S.
Congress and leading robotics companies, schools, and organizations.

ISF VIEWS NORTH WESTERN EUROPE BENEATH THE AURORA BOREALIS

Flying at an altitude of about 240 miles over the eastern North Atlantic, the Expedition 30 crew aboard the International Space Station photographed this nighttime scene. This view looks northeastward. Center point coordinates are 46.8 degrees north latitude and 14.3 degrees west longitude. The night lights of the cities of Ireland, in the foreground, and the United Kingdom, in the back and to the right, are contrasted by the bright sunrise in the background. The greens and purples of the Aurora Borealis are seen along the rest of the horizon. This image was taken on March 28, 2012. Image Credit: NASA

VIEW OF DUBAI FROM THE INTERNATIONAL SPACE STATION

FROM:  NASA
City lights of Dubai, United Arab Emirates, are featured in this image taken by the Expedition 30 crew aboard the International Space Station. The City of Dubai--the largest metropolitan area within the emirate of Dubai--is a favorite subject of astronaut photography largely due to the unique artificial archipelagos situated directly offshore in the Persian Gulf, which were built such that their full design is only visible from the vantage point of an airplane -- or an orbiting spacecraft. The city presents an eye-catching appearance at night that vividly displays the urban development pattern. In this detailed image, taken with a long focal length lens and digital camera optimized for fast response and high light sensitivity, several interesting patterns can be observed. The highways and major streets are sharply defined by yellow-orange lighting, while the commercial and residential areas are resolved into a speckle pattern of individual white, blue and yellow-orange lights. Several large and brilliantly lit areas are large hotel and mall complexes, including the Burj Khalifa Tower, the world's tallest building at 2,717 feet, or 828 meters. The brilliant lighting of the city contrasts sharply with both the dark Persian Gulf to the northwest, and largely undeveloped and unlit areas to the southeast. Likewise, the clusters of lighting in the Palm Jumeira complex at bottom right correspond to the relatively small part of the archipelago that has been developed. Isolated areas of blurred city lights are due to patchy clouds. Image Credit: NASA

SPACESHIP OF STARS?

The NASA/ESA Hubble Space Telescope has spotted the "UFO Galaxy." NGC 2683 is a spiral galaxy seen almost edge-on, giving it the shape of a classic science fiction spaceship. This is why the astronomers at the Astronaut Memorial Planetarium and Observatory, Cocoa, Fla., gave it this attention-grabbing nickname. While a bird's eye view lets us see the detailed structure of a galaxy (such as this Hubble image of a barred spiral), a side-on view has its own perks. In particular, it gives astronomers a great opportunity to see the delicate dusty lanes of the spiral arms silhouetted against the golden haze of the galaxy’s core. In addition, brilliant clusters of young blue stars shine scattered throughout the disc, mapping the galaxy’s star-forming regions. Perhaps surprisingly, side-on views of galaxies like this one do not prevent astronomers from deducing their structures. Studies of the properties of the light coming from NGC 2683 suggest that this is a barred spiral galaxy, even though the angle we see it at does not let us see this directly. This image is produced from two adjacent fields observed in visible and infrared light by Hubble’s Advanced Camera for Surveys. A narrow strip which appears slightly blurred and crosses most the image horizontally is a result of a gap between Hubble’s detectors. This strip has been patched using images from observations of the galaxy made by ground-based telescopes, which show significantly less detail. The field of view is approximately 6.5 by 3.3 arcminutes. Image Credit: ESA/Hubble & NASA
The Photo and excerpt are from the NASA website:

NASA LOOKING TO FIND WASTE SOLUTIONS FOR SPACE TRAVELERS

The following excerpt is from the NASA website:
NASA, the U.S. Agency for International Development (USAID), the State 
Department and Nike today announced a challenge to identify 10 
game-changing innovations that could transform waste-management 
systems and practices. Waste management is important for planning 
long-duration human spaceflight missions to an asteroid, Mars or 
beyond. 

Humans living off the planet require waste solutions that mirror 
issues facing people on Earth. In the hostile environment of space, 
waste must be eliminated or transformed in the most efficient and 
cost-effective manner possible. The innovations, which will be 
presented at the LAUNCH: Beyond Waste forum, may lead to practical 
applications for astronauts as we send humans deeper into our solar 
system. 

The challenge will be open April 1-May 15 and will seek creative 
solutions to minimize waste or transform it into new products in 
space and on Earth. Forum partners will select 10 innovators to 
present their technology solutions at the LAUNCH: Beyond Waste forum, 
hosted by NASA July 20-22, at the agency's Jet Propulsion Laboratory 
in Pasadena, Calif. 

NASA and the LAUNCH Council -- thought leaders representing a diverse 
and collaborative body of entrepreneurs, scientists, engineers, 
government, media and business -- will participate in the forum and 
help guide these innovations forward. The selected LAUNCH innovators 
will receive networking and mentoring opportunities from influential 
business and government leaders, as well as portfolio presentations. 

Previous LAUNCH forums have focused on water, health and energy. These 
forums resulted in innovations, including technology that enables 
irrigation using brackish, saline and polluted water; a biodegradable 
needle that can deliver vaccines or medicine under the skin using a 
pressure device; a tiny holographic microscope attached to a cell 
phone that can detect parasites and bacteria in blood and water in 
remote locations; a handheld lab-in-a-box that diagnoses a variety of 
diseases in a matter of minutes; a modular, flexible smart-grid 
distribution technology to provide access to power for those in need; 
and a simple, affordable fuel cell that converts biomass directly to 
electricity. 

LAUNCH was created to identify, showcase and support innovative 
approaches to global sustainability challenges. LAUNCH searches for 
visionaries whose ideas, technologies or programs show great promise 
for making tangible impacts on society in the developed and 
developing worlds. 

ENDEAVOR'S OMS POD GETS A CLEANING

In Orbiter Processing Facility-2 at NASA's Kennedy Space Center in Florida, space shuttle Endeavour’s left orbital maneuvering system OMS pod is in position on the aft of the shuttle and ready for installation. The OMS pod underwent complete deservicing and cleaning at White Sands Space Harbor in New Mexico, part of the transition and retirement processing of each shuttle. Endeavour is being prepared for public display at the California Science Center in Los Angeles. Over the course of its 19-year career, Endeavour spent 299 days in space during 25 missions. Image credit: NASA/Dimitri Gerondidakis
The above photo and excerpt are from the NASA website:

ROCKETS USED TO STUDY UPPER LEVEL JET STREAM

The following photo and excerpt are from the NASA website:
NASA successfully launched five suborbital sounding rockets from its Wallops Flight Facility in Virginia as part of a study of the upper level jet stream. This image was captured on March 27, 2012. The first rocket was launched at 4:58 a.m. EDT and each subsequent rocket was launched 80 seconds apart. Each rocket released a chemical tracer that created milky, white clouds at the edge of space. Tracking the way the clouds move can help scientists understand the movement of the winds some 65 miles up in the sky, which in turn will help create better models of the electromagnetic regions of space that can damage man-made satellites and disrupt communications systems. The launches and clouds were reported to be seen from as far south as Wilmington, N.C.; west to Charlestown, W. Va.; and north to Buffalo, N.Y. Image Credit: NASA/Wallops

NASA'S DAWN SPACECRAFT OBSERVES ASTEROID CALLED VESTA

The following excerpt is from the NASA website:
WASHINGTON -- NASA's Dawn spacecraft has revealed unexpected details
on the surface of the giant asteroid Vesta. New images and data
highlight the diversity of Vesta's surface and reveal unusual
geologic features, some of which were never previously seen on
asteroids.

Vesta is one of the brightest objects in the solar system and the only
asteroid in the so-called main belt between Mars and Jupiter visible
to the naked eye from Earth. Dawn found that some areas on Vesta can
be nearly twice as bright as others, revealing clues about the
asteroid's history.

"Our analysis finds this bright material originates from Vesta and has
undergone little change since the formation of Vesta over 4 billion
years ago," said Jian-Yang Li, a Dawn participating scientist at the
University of Maryland, College Park. "We're eager to learn more
about what minerals make up this material and how the present Vesta
surface came to be."

Bright areas appear everywhere on Vesta but are most predominant in
and around craters. The areas vary from several hundred feet to
around 10 miles across. Rocks crashing into the surface of Vesta seem
to have exposed and spread this bright material. This impact process
may have mixed the bright material with darker surface material.

While scientists had seen some brightness variations in previous
images of Vesta from NASA's Hubble Space Telescope, Dawn scientists
also did not expect such a wide variety of distinct dark deposits
across its surface. The dark materials on Vesta can appear dark gray,
brown and red. They sometimes appear as small, well-defined deposits
around impact craters. They also can appear as larger regional
deposits, like those surrounding the impact craters scientists have
nicknamed the "snowman."

"One of the surprises was the dark material is not randomly
distributed," said David Williams, a Dawn participating scientist at
Arizona State University, Tempe. "This suggests underlying geology
determines where it occurs."

The dark materials seem to be related to impacts and their aftermath.
Scientists theorize carbon-rich asteroids could have hit Vesta at
speeds low enough to produce some of the smaller deposits without
blasting away the surface.

Higher-speed asteroids also could have hit the asteroid's surface and
melted the volcanic basaltic crust, darkening existing surface
material. That melted conglomeration appears in the walls and floors
of impact craters, on hills and ridges, and underneath brighter, more
recent material called ejecta, which is material thrown out from a
space rock impact.

Vesta's dark materials suggest the giant asteroid may preserve ancient
materials from the asteroid belt and beyond, possibly from the birth
of the solar system.

"Some of these past collisions were so intense they melted the
surface," said Brett Denevi, a Dawn participating scientist at the
Johns Hopkins University Applied Physics Laboratory in Laurel, Md.
"Dawn's ability to image the melt marks a unique find. Melting events
like these were suspected, but never before seen on an asteroid."

Dawn launched in September 2007. It will reach its second destination,
Ceres, in February 2015.

"Dawn's ambitious exploration of Vesta has been going beautifully,"
said Marc Rayman, Dawn chief engineer at NASA's Jet Propulsion
Laboratory (JPL) in Pasadena, Calif. "As we continue to gather a
bounty of data, it is thrilling to reveal fascinating alien
landscapes."

Dawn's mission is managed by JPL for NASA's Science Mission
Directorate in Washington. Dawn is a project of the directorate's
Discovery Program, managed by NASA's Marshall Space Flight Center in
Huntsville, Ala. UCLA is responsible for overall Dawn mission
science. Orbital Sciences Corp. in Dulles, Va., designed and built
the spacecraft. The German Aerospace Center, the Max Planck Institute
for Solar System Research, the Italian Space Agency and the Italian
National Astrophysical Institute are international partners on the
mission team.

EXPERIMENTAL PAYLOADS SELECTED FOR COMMERCIAL SUBORBITAL FLIGHTS

The following excerpt is from the NASA website: 
WASHINGTON -- NASA's Flight Opportunities Program has selected 24
cutting-edge space technology payloads for flights on commercial
reusable launch vehicles, balloons and a commercial parabolic
aircraft.

Sixteen of the payloads will ride on parabolic aircraft flights, which
provide brief periods of weightlessness. Five will fly on suborbital
reusable launch vehicle test flights. Two will ride on high-altitude
balloons that fly above 65,000 feet. One payload will fly on the
suborbital launch vehicle and high-altitude balloon platforms. The
flights will take place in 2012 and 2013.

Flight platforms include the Zero-G parabolic airplane, Near Space
Corp. high altitude balloons and reusable launch vehicles from
Armadillo Aerospace, Masten Space Systems, UP Aerospace and Virgin
Galactic.

"NASA's Flight Opportunities Program leverages investment in
commercially available vehicles and platforms to enable new
technology discoveries," said Michael Gazarik, director of NASA's
Space Technology Program at NASA Headquarters in Washington. "These
flights enable researchers to demonstrate the viability of their
technologies while taking advantage of American commercial access to
near-space."

Payloads selected for flight on a parabolic aircraft are:
-- "Microgravity Health Care," Scott Alexander Dulchavsky, Henry Ford
Health System, Detroit
-- "Activity Monitoring During Parabolic Flight," Peter Cavanagh,
University of Washington, Seattle
-- "Physics of Regolith Impacts in Microgravity Experiment," Josh
Colwell, University of Central Florida, Orlando
-- "UAH CubeSat Parabolic Flight Testing," Francis Wessling,
University of Alabama, Huntsville
-- "Fuel Mass Gauging Under Zero-G Environment Based on Electrical
Capacitance Volumatric Tomography Techniques," Manohar Deshpande,
NASA's Goddard Space Flight Center, Greenbelt, Md.
-- "Microgravity Effects of Nanoscale Mixing on Diffusion Limited
Processes Using Electrochemical Electrodes," Carlos Cabrera,
University of Puerto Rico, San Juan
-- "Effects of Reduced Gravity on Flow Boiling and Condensation,"
Issam Mudawar, Purdue University, West Lafayette, Ind.
-- "OSIRIS-REx Low-Gravity Regolith Sampling Tests," Joseph Vellinga,
Lockheed Martin Space Systems Company, Denver
-- "Parabolic Flight: Validation of Electro-Hydrodynamic Gas-Liquid
Phase Separation in Microgravity," Boris Khusid, New Jersey Institute
of Technology, Newark
-- "Non-Invasive Hemodynamic Monitoring in Microgravity," Gregory
Kovacs, Stanford University, Stanford, Calif.
-- "Parabolic Flight Evaluation of a Hermetic Surgery System for
Reduced Gravity," George Pantalos, University of Louisville,
Louisville, Ky.
-- "Evaporative Heat Transfer Mechanisms within a Heat Melt Compactor
Experiment," Eric Golliher, NASA's Glenn Research Center, Cleveland
-- "Effects of Reduced and Hyper Gravity on Functional Near-Infrared
Spectroscopy Instrumentation," Greg Adamovsky, NASA Glenn
-- "Sintering of Composite Materials Under Reduced Gravity Conditions
("Cosmic" Project), Orazio Chiarenza, the Advanced Technical
Institute, Fuscaldo, Italy
-- "Boston University Student Proposal for Deployable Solar and
Antenna Array Microgravity Testing," Theodore Fritz, Boston
University
-- "Particle Dispersion System for Microgravity Environments," John
Marshall, SETI Institute, Mountain View, Calif.

Payloads selected for flight on a suborbital launch vehicle are:
-- "Near-Zero Gravity Cryogenic Line Chilldown Experiment in a
Suborbital Reusable Launch Vehicle," Jacob Chung, University of
Florida, Gainesville, Fla.
-- "Collection of Regolith Experiment on a Commercial Suborbital
Vehicle," and "Collisions Into Dust Experiment on a Commercial
Suborbital Vehicle, Josh Colwell, University of Central Florida,
Orlando
-- "Polar Mesospheric Cloud Imaging and Tomography Experiment," Jason
David Reimuller, Space Science Institute, Boulder, Colo.
-- "Vision Navigation System Technology Demonstration," Douglas
Zimpfer, Draper Laboratory, Houston

Payloads selected for flight on a high altitude balloon are:
-- "Flight Demonstration of an Integrated Camera and Solid-State Fine
Steering System," Eliot Young, Southwest Research Institute, Boulder,
Colo.
-- "Initial Flight Testing of a UAT ADS-B Transmitter Prototype for
Commercial Space Transportation Using a High Altitude Balloon,"
Richard Stansbury, Embry-Riddle Aeronautical University, Daytona
Beach, Fla.

The "Structural Health Monitoring for Commercial Space Vehicles"
payload from Andrei Zagrai of the New Mexico Institute of Mining and
Technology in Socorro, will fly on a suborbital launch vehicle and a
high-altitude balloon.

NASA manages the Flight Opportunities Program manifest, matching
payloads with flights, and will pay for payload integration and the
flight costs for the selected payloads. No funds are provided for the
development of these payloads. Other suborbital flight vendors on
contract to NASA will provide flights after they have successfully
flown their qualifying vehicles.

The Flight Opportunities Program, part of NASA's Space Technology
Program, is managed at NASA's Dryden Flight Research Center in
Edwards, Calif. NASA's Ames Research Center at Moffett Field, Calif.
manages the payload activities for the program.

GENERAL SPACE CAPABILITY INTEGRAL TO ALL MILITARY OPERATIONS

The following excerpt is from a Department of Defense American Forces Press Service e-mail:
By Cheryl Pellerin
American Forces Press Service
WASHINGTON, March 23, 2012 - Space capabilities have become integral to all military operations, the commander of Air Force Space Command told reporters here during a Defense Writers Group breakfast yesterday.
"It's hard to imagine what life was like before we had ... GPS providing very accurate targeting capability, military satellite communications providing all the reach-back that's needed, [and] missile warning providing cover for our deployed forces," Air Force Gen. William L. Shelton said.

The Air Force launched and maintains the 24 satellites that make up the GPS navigation system. The all-weather, 24-hour system was intended for military use, but in 1983 President Ronald Reagan made it freely available to civilians, for the public good, after a Korean Air Lines flight carrying 269 people was shot down for straying into Soviet airspace.

The first GPS satellite was launched in 1989, and the 24th in 1994. In 2000, Congress authorized a modernization effort called GPS-III that will improve position, navigation and timing services and add advanced anti-jam capabilities to the constellation.
"The biggest concern is that GPS's signal is a very weak [one]," Shelton said. "It's a spread-spectrum signal, and it is not difficult to jam. ... In fact, you can buy [a GPS jammer] online, and we're starting to see even criminal elements use GPS jamming to cover their tracks. The game afoot here is to continue to drive a no-kidding adversary to higher powers of their jammers. Once you get to a significant power level, those are called targets."

The Air Force is cranking up power on the satellites to force adversaries to use higher-power jammers that can then be found and targeted, Shelton said.
"One of the design features of GPS-III is higher power," Shelton said, "and we also can do some things with antenna technology and the way we operate our platforms to protect ourselves from jamming."
For the Air Force satellite effort, space launch -- getting satellites from Earth to orbit -- is truly foundational, Shelton said. In 2011, the Defense Department and intelligence community succeeded in all 49 attempts to launch evolved expendable launch vehicles, or EELVs, that carried satellites into orbit.
The Air Force EELV program, replacing the existing launch fleet with two families of vehicles that use common components and infrastructure, seeks to make space launch more reliable and affordable, the general explained.

United Launch Alliance, which Shelton called "the only supplier of the full gamut of launch capabilities," now handles space launches for the Defense Department, NASA, and the intelligence community -- including the National Reconnaissance Office, the government agency that designs, builds, launches and maintains U.S. intelligence satellites.
ULA, formed in 2006, is a joint venture by Lockheed Martin and the Boeing Co. that uses Atlas V and Delta II and Delta IV launch vehicles to support strategic U.S. space initiatives.

"We are very proud of our success record in the launch business, unprecedented in the history of space flight, ... but at the same time, with costs spiraling like they are, we have to take action to reduce the cost," Shelton said.
One action, he said, is to ask ULA to come in with priced options for booster cores, or rocket stages, over three to five years. "Somewhere in there," the general added, "we believe there will be a sweet spot for us."
The other action, Shelton said, is to use commercial services whenever possible, citing military use of wideband communications as an example.
"If all I'm concerned about is volumes of data moving around in space and ultimately down on the ground, commercial space knows how to do that very well and very economically," he explained. "If you look at the bandwidth coming back from Afghanistan, somewhere in the 70 percent to 80 percent range is commercial satellite communications. We've already proven in warfare that we can rely on commercial satellite communication."
But the services must be assured of worldwide capability, the general said.

"If you tell me where I'm going to fight, it's easy," Shelton said. "But if I have to protect the capability to fight anywhere, any time, can I do it commercially, or do I have to have a dedicated military capability to do that? Those are all the kinds of things we are exploring with the commercial community."

Using commercial space launch services for national security satellite launches is not an option today, he said, because the capability doesn't yet exist in the commercial world.
"A national security payload on top of a commercial asset has to be a proven capability," Shelton said. "When you're talking $1 billion for a satellite, as well as the national security capability that satellite represents, as well as how long it would take you to get replacement capability for that, you just don't want to take the risk."

Two U.S. commercial space companies, Orbital Sciences Corp. and Space Exploration Technologies Corp., have the potential to launch national security assets.
Orbital, based in Virginia, has delivered or had under contract 1,000 satellites, launch vehicles and other space-related systems since 1982. The company says it provides full-service engineering, production and technical services for NASA, DOD and commercial and academic space programs, and is supplying commercial cargo resupply services for the International Space Station.

SpaceX, established in 2002, reports that it has developed two new launch vehicles; has a manifest for light, medium and heavy-lift space launches into 2017; and has received commercial off-the-shelf funding from NASA to demonstrate delivery and return of cargo to the space station.

Shelton said the Air Force distributed a step-by-step guide to certification for national security launches in October. Commercial companies, he said, "just need to give us adequate insight to [their history of] commercial missions so we can assure ourselves that no corners were cut, that we understand their process, the reliability of the components [and] their capabilities."

"Once they've proven that with a number of missions," he added, "they'll be ready to go."

MESSIER 9 STAR CLUSTER

This photo and excerpt are from the NASA website:
The Hubble Space Telescope has produced the most detailed image so far of Messier 9, a globular star cluster located close to the center of the galaxy. This ball of stars is too faint to see with the naked eye, yet Hubble can see over 250,000 individual stars shining in it. Messier 9, pictured here, is a globular cluster, a roughly spherical swarm of stars that lies around 25,000 light-years from Earth, near the center of the Milky Way, so close that the gravitational forces from the galactic center pull it slightly out of shape. Globular clusters are thought to harbor some of the oldest stars in our galaxy, born when the universe was just a small fraction of its current age. As well as being far older than the sun -- around twice its age -- the stars of Messier 9 also have a markedly different composition, and are enriched with far fewer heavier elements than the sun. In particular, the elements crucial to life on Earth, like oxygen and carbon, and the iron that makes up our planet’s core, are very scarce in Messier 9 and clusters like it. This is because the universe’s heavier elements were gradually formed in the cores of stars, and in supernova explosions. When the stars of Messier 9 formed, there were far smaller quantities of these elements in existence. As well as showing the individual stars, Hubble’s image clearly shows the different colors of the stars. A star’s color is directly related to its temperature -- counter-intuitively, perhaps, the redder it is, the cooler it is; and the bluer it is, the hotter. The wide range of stellar temperatures here is clearly displayed by the broad palette of colors visible in this image. Image Credit: NASA and ESA

VIEW OF SATURN'S MOON ENCELADUS

The photo and following  excerpt is from the NASA website:
Below a darkened Enceladus, a plume of water ice is backlit in this view of one of Saturn's most dramatic moons. Dramatic plumes, both large and small, spray water ice from many locations along the moon's famed "tiger stripes" near the south pole of Enceladus. The tiger stripes are fissures that spray icy particles, water vapor and organic compounds. The terrain seen here is on the leading hemisphere of Enceladus (313 miles, or 504 kilometers across). North is up. The image was taken in visible light with the Cassini spacecraft narrow-angle camera on Feb. 20, 2012. The view was acquired at a distance of approximately 83,000 miles (134,000 kilometers) from Enceladus and at a Sun-Enceladus-spacecraft, or phase, angle of 165 degrees. Image scale is 2,628 feet (801 meters) per pixel. Image credit: NASA/JPL-Caltech/Space Science Institute

NASA SEARCHING FOR PROPOSALS FOR HEAVY- LIFT ROCKET

The following excerpt is from the NASA website: 

HUNTSVILLE, Ala. -- NASA's Marshall Space Flight Center in Huntsville, 
Ala., has issued a NASA Research Announcement (NRA) for advanced 
development proposals to support the nation's next heavy-lift rocket, 
the Space Launch System (SLS). 

NASA is soliciting proposals from industry and academia for innovative 
advanced development in areas including concept development, trades 
and analyses, propulsion, structures, materials, manufacturing, 
avionics and software. These efforts will focus on affordability and 
sustainability of the SLS as it evolves from a 70-metric-ton vehicle 
to a 130-metric-ton vehicle. 

"We look forward to hearing from both industry and academia on 
advanced development solutions that will enable the full capability 
of the evolved Space Launch System," said Mindy Niedermeyer, the 
evaluation team chair. "It's an exciting time for NASA. These 
solutions will create entirely new developments in space technology, 
taking humans farther in space than ever before." 

NASA anticipates making multiple awards in response to this 
solicitation with approximately $48 million in total funding. Of this 
total amount, the funding anticipated for the base year (Fiscal Year 
2013) is $22 million, with $14.5 million for the first year option 
(Fiscal Year 2014), and $11.5 million for the second year option 
(Fiscal Year 15). Total funding to be allocated to academic awards 
for this NRA is approximately $1.5 million per year. Individual 
academic awards are expected to be valued up to $250,000 per year. 
The deadline to submit proposals is May 15, 2012. 

MARS ROVER AS SEEN BY ITSELF

This self portrait from NASA's Mars Exploration Rover Opportunity shows dust accumulation on the rover's solar panels as the mission approached its fifth Martian winter. The dust reduces the rover's power supply, and the rover's mobility is limited until the winter is over or wind cleans the panels. This is a mosaic of images taken by Opportunity's panoramic camera (Pancam) during the 2,111th to 2,814th Martian days, or sols, of the rover's mission (Dec. 21 to Dec. 24, 2011). The downward-looking view omits the mast on which the camera is mounted. The portrait is presented in approximate true color, the camera team's best estimate of what the scene would look like if humans were there and able to see it with their own eyes. Opportunity has worked through four Martian southern hemisphere winters since it landed in in January 2004 about 14 miles (23 kilometers) northwest of its current location. Closer to the equator than its twin rover, Spirit, Opportunity has not needed to stay on a sun-facing slope during the previous winters. Now, however, Opportunity's solar panels carry a thicker coating of dust, and the team is using a strategy employed for three winters with Spirit: staying on a sun-facing slope. The sun will pass relatively low in the northern sky from the rover's perspective for several months of shortened daylight before and after the southern Mars winter solstice on March 30, 2012. Opportunity is conducting research while located on the north-facing slope of a site called "Greeley Haven." Image Credit: NASA/JPL-Caltech/Cornell/Arizona State Univ.
The above excerpt and photo are from the NASA website: