The International Space Station. Credit: NASA
Thursday, April 19, 2012
NASA, LIBRARY OF CONGRESS SELECT FIRST ASTROBIOLOGY CHAIR
FROM: NASA
WASHINGTON -- NASA and the Library of Congress have announced the
selection of David H. Grinspoon to be the first Baruch S. Blumberg
NASA-Library of Congress Chair in Astrobiology.
The chair, selected through an international competition, is named for
the late Nobel Laureate and founding director of the NASA
Astrobiology Institute, Baruch "Barry" Blumberg. Applications are
solicited by the Library of Congress and reviewed by a panel jointly
established by the Library and NASA. The prestigious position was
created in November 2011.
Grinspoon will be in residence for a year beginning November 2012 at
the library's scholarly research organization, the Kluge Center, in
Washington. He is the curator of astrobiology in the Department of
Space Sciences at the Denver Museum of Nature and Science. Grinspoon
is a well-known researcher in planetary science and the author of the
award-winning book "Lonely Planets: The Natural Philosophy of Alien
Life."
"Grinspoon's background as an astrobiology researcher, writer and
communicator of science makes him an ideal choice," said Carl
Pilcher, director of the Astrobiology Institute at NASA's Ames
Research Center at Moffett Field, Calif. "This is certainly the start
of what will become a great tradition of astrobiology chairs at the
library."
Astrobiology is the study of the origins, evolution, distribution and
future of life in the universe. It addresses three fundamental
questions: How did life begin and evolve? Is there life elsewhere?
What is the future of life on Earth and beyond? The institute's
mission is to promote interdisciplinary research in astrobiology,
train the next generation of astrobiologists and provide scientific
and technical leadership for NASA space missions.
"Grinspoon is uniquely positioned to introduce the Library's unique
multidisciplinary collections on the emerging subject to a wide and
diverse public," said Librarian of Congress James H. Billington.
At the library, Blumberg was a founding member of the Scholar's
Council, a 12-member group of distinguished scholars who advise the
Librarian of Congress on matters of scholarship.
Blumberg was awarded the 1976 Nobel Prize in physiology or medicine
for discovery of the Hepatitis B virus and development of a vaccine
to prevent Hepatitis B infection. He was the founding director of the
NASA Astrobiology Institute, serving from 1999 to 2002.
Grinspoon will examine choices facing humanity as we enter the
Anthropocene Era, the epoch when human activities are becoming a
defining characteristic of the physical nature and functioning of
Earth. His research will include studies of the role of planetary
exploration in fostering scientific and public understanding of
climate change and the power of astrobiology as a model of
interdisciplinary research and communication.
Wednesday, April 18, 2012
SPACE SHUTTLE DISCOVERY DISCOVERS ITS FINAL RESTING PLACE
FROM: U.S. NAVY
The space shuttle Discovery attached to its 747 transport passes over the nation's capital. It will land in Washington D.C. to become an exhibit at the Smithsonian Air and Space Museum. Discovery, along with the rest of the shuttle fleet, has been retired from active service after 32 years of operations. U.S. Navy photo by Mass Communication Specialist 1st Class Jason M. Graham
Tuesday, April 17, 2012
COMMERCIAL PLATFORM OFFERS EXPOSURE AT SPACE STATION
FROM: NASA
WASHINGTON -- Researchers will be able to expose experiments to the
weightlessness and vacuum of space by using a new commercial platform
outside of International Space Station (ISS).
NanoRacks LLC will develop and operate the External Platform Program
(EPP) to take advantage of the only orbiting lab that offers
long-term, repeat access to the unique environment of unpressurized
space. NanoRacks is a private company already operating research
facilities under a NASA Space Act Agreement for use of the station's
U.S. National Laboratory.
The EPP and equipment will be developed and operated using only
commercial funding. NASA will contribute space station hardware and
resources such as power and data transmission systems. The Center for
the Advancement of Science in Space (CASIS), which manages the
portion of the station operated as a U.S. National Laboratory, will
reserve the first external platform site for commercial researchers.
The external platform, scheduled to be launched by 2014, will provide
low-cost access to space. It is designed to encourage users to test
materials, biological samples, sensors and sophisticated electronics
outside the space station, which orbits 240 miles above Earth.
"This program opens the door to allow commercial users to fully
utilize not only the U.S. National Laboratory in a pressurized
environment but also outside," said ISS National Laboratory Manager
Marybeth Edeen. "It's another example how companies are investing
their own money to take advantage of this unique national resource."
NanoRacks selected Astrium North America as a team member in the
development of the EPP facility. The program capitalizes on the
history and strengths of the two companies in providing external
payload platforms, operating commercial facilities, and using
off-the-shelf hardware, standard interfaces and existing space
station data and power systems.
The contributions by NanoRacks and Astrium are the most recent example
of NASA efforts to expand the station's research capacity through
innovative partnerships with commercial companies.
"This new capability offers unique opportunities for the research
community and industry to engage in exciting areas of study,
including materials and observational sciences," said CASIS Interim
Executive Director Jim Royston.
NanoRacks operates platforms inside the U.S. National Laboratory,
which also were financed and developed solely by the commercial
company and its partners.
Monday, April 16, 2012
BLACK HOLE BLAZARS AND THE RELEASE OF NEARLY LIGHT SPEED JETS
FROM: NASA
WASHINGTON -- Astronomers are actively hunting a class of supermassive
black holes throughout the universe called blazars thanks to data
collected by NASA's Wide-field Infrared Survey Explorer (WISE). The
mission has revealed more than 200 blazars and has the potential to
find thousands more.
Blazars are among the most energetic objects in the universe. They
consist of supermassive black holes actively "feeding," or pulling
matter onto them, at the cores of giant galaxies. As the matter is
dragged toward the supermassive hole, some of the energy is released
in the form of jets traveling at nearly the speed of light. Blazars
are unique because their jets are pointed directly at us.
"Blazars are extremely rare because it's not too often that a
supermassive black hole's jet happens to point towards Earth," said
Franceso Massaro of the Kavli Institute for Particle Astrophysics and
Cosmology near Palo Alto, Calif., and principal investigator of the
research, published in a series of papers in the Astrophysical
Journal. "We came up with a crazy idea to use WISE's infrared
observations, which are typically associated with lower-energy
phenomena, to spot high-energy blazars, and it worked better than we
hoped."
The findings ultimately will help researchers understand the extreme
physics behind super-fast jets and the evolution of supermassive
black holes in the early universe.
WISE surveyed the entire celestial sky in infrared light in 2010,
creating a catalog of hundreds of millions of objects of all types.
Its first batch of data was released to the larger astronomy
community in April 2011 and the full-sky data were released last
month.
Massaro and his team used the first batch of data, covering more than
one-half the sky, to test their idea that WISE could identify
blazars. Astronomers often use infrared data to look for the weak
heat signatures of cooler objects. Blazars are not cool; they are
scorching hot and glow with the highest-energy type of light, called
gamma rays. However, they also give off a specific infrared signature
when particles in their jets are accelerated to almost the speed of
light.
One of the reasons the team wants to find new blazars is to help
identify mysterious spots in the sky sizzling with high-energy gamma
rays, many of which are suspected to be blazars. NASA's Fermi mission
has identified hundreds of these spots, but other telescopes are
needed to narrow in on the source of the gamma rays.
Sifting through the early WISE catalog, the astronomers looked for the
infrared signatures of blazars at the locations of more than 300
gamma-ray sources that remain mysterious. The researchers were able
to show that a little more than half of the sources are most likely
blazars.
"This is a significant step toward unveiling the mystery of the many
bright gamma-ray sources that are still of unknown origin," said
Raffaele D'Abrusco, a co-author of the papers from Harvard
Smithsonian Center for Astrophysics in Cambridge, Mass. "WISE's
infrared vision is actually helping us understand what's happening in
the gamma-ray sky."
The team also used WISE images to identify more than 50 additional
blazar candidates and observed more than 1,000 previously discovered
blazars. According to Massaro, the new technique, when applied
directly to WISE's full-sky catalog, has the potential to uncover
thousands more.
"We had no idea when we were building WISE that it would turn out to
yield a blazar gold mine," said Peter Eisenhardt, WISE project
scientist at NASA's Jet Propulsion Laboratory (JPL) in Pasadena,
Calif., who is not associated with the new studies. "That's the
beauty of an all-sky survey. You can explore the nature of just about
any phenomenon in the universe."
JPL manages and operates WISE for NASA's Science Mission Directorate
in Washington. The principal investigator for WISE, Edward Wright, is
at UCLA. The mission was competitively selected under NASA's
Explorers Program, managed by the Goddard Space Flight Center in
Greenbelt, Md. The science instrument was built by the Space Dynamics
Laboratory in Logan, Utah, and the spacecraft was built by Ball
Aerospace & Technologies Corp. in Boulder, Colo. Science operations
and data processing and archiving take place at the Infrared
Processing and Analysis Center at the California Institute of
Technology (Caltech) in Pasadena. Caltech manages JPL for NASA.
Sunday, April 15, 2012
GALACTIC COLLISION
Using a combination of powerful observatories in space and on the ground, astronomers have observed a violent collision between two galaxy clusters in which so-called normal matter has been wrenched apart from dark matter through a violent collision between two galaxy clusters.
Finding another system that is further along in its evolution than the Bullet Cluster gives scientists valuable insight into a different phase of how galaxy clusters -- the largest known objects held together by gravity -- grow and change after major collisions.
Researchers used observations from NASA's Chandra X-ray Observatory and Hubble Space Telescope as well as the Keck, Subaru and Kitt Peak Mayall telescopes to show that hot, X-ray bright gas in the Musket Ball Cluster has been clearly separated from dark matter and galaxies.
In this composite image, the hot gas observed with Chandra is colored red, and the galaxies in the optical image from Hubble appear as mostly white and yellow. The location of the majority of the matter in the cluster (dominated by dark matter) is colored blue. When the red and the blue regions overlap, the result is purple as seen in the image. The matter distribution is determined by using data from Subaru, Hubble and the Mayall telescope that reveal the effects of gravitational lensing, an effect predicted by Einstein where large masses can distort the light from distant objects.
In addition to the Bullet Cluster, five other similar examples of merging clusters with separation between normal and dark matter and varying levels of complexity, have previously been found. In these six systems, the collision is estimated to have occurred between 170 million and 250 million years earlier.
In the Musket Ball Cluster, the system is observed about 700 million years after the collision. Taking into account the uncertainties in the age estimate, the merger that has formed the Musket Ball Cluster is two to five times further along than in previously observed systems. Also, the relative speed of the two clusters that collided to form the Musket Ball cluster was lower than most of the other Bullet Cluster-like objects.
The special environment of galaxy clusters, including the effects of frequent collisions with other clusters or groups of galaxies and the presence of large amounts of hot, intergalactic gas, is likely to play an important role in the evolution of their member galaxies. However, it is still unclear whether cluster mergers trigger star formation, suppress it, or have little immediate effect. The Musket Ball Cluster holds promise for deciding between these alternatives.
The Musket Ball Cluster also allows an independent study of whether dark matter can interact with itself. This information is important for narrowing down the type of particle that may be responsible for dark matter. No evidence is reported for self-interaction in the Musket Ball Cluster, consistent with the results for the Bullet Cluster and the other similar clusters.
The Musket Ball Cluster is located about 5.2 billion light years away from Earth. A paper describing these results was led by Will Dawson from University of California, Davis and was published in the March 10, 2012 issue of The Astrophysical Journal Letters. The other co-authors were David Wittman, M. James Jee and Perry Gee from UC Davis, Jack Hughes from Rutgers University in NJ, J. Anthony Tyson, Samuel Schmidt, Paul Thorman and Marusa Bradac from UC Davis, Satoshi Miyazaki from the Graduate University for Advanced Studies (GUAS) in Tokyo, Japan, Brian Lemaux from UC Davis, Yousuke Utsumi from GUAS and Vera Margoniner from California State University, Sacramento.
NASA's Marshall Space Flight Center in Huntsville, Ala., manages the Chandra program for NASA's Science Mission Directorate in Washington. The Smithsonian Astrophysical Observatory controls Chandra's science and flight operations from Cambridge, Mass.
Saturday, April 14, 2012
NASA 905 WILL TAKE SHUTTLES TO FINAL RESTING PLACES
The Shuttle Carrier Aircraft glides down the runway of the Shuttle Landing Facility at NASA’s Kennedy Space Center in Florida. The aircraft, known as an SCA, arrived at 5:35 p.m. EDT to prepare for shuttle Discovery’s ferry flight to the Washington Dulles International Airport in Sterling, Va., on April 17. This SCA, designated NASA 905, is a modified Boeing 747 jet airliner, originally manufactured for commercial use. One of two SCAs employed over the course of the Space Shuttle Program, NASA 905 is assigned to the remaining ferry missions, delivering the shuttles to their permanent public display sites. NASA 911 was decommissioned at the NASA Dryden Flight Research Center in California in February. Discovery will be placed on permanent public display in the Smithsonian's National Air and Space Museum Steven F. Udvar-Hazy Center in Chantilly, Va. Image Credit: NASA/Frankie Martin
Friday, April 13, 2012
Thursday, April 12, 2012
Tuesday, April 10, 2012
SPACE SHUTTLE IMAX CAMERA ON DISPLAY AT SMITHSONIAN
An IMAX camera that flew aboard a space shuttle is seen at the Moving Beyond Earth Gallery at the Smithsonian National Air and Space Museum, Wednesday, April 4, 2012, in Washington. This and another IMAX camera that flew in space became a part of the museum's collection. From 1984 to 1998 the 70mm cameras accompanied astronauts on 17 space shuttle missions offering stunning views of Earth from space and offered an up-close look at what it is like to live and work in a weightless environment. Image Credit: NASA/Paul E. Alers
Monday, April 9, 2012
ESA'S AUTOMATED TRANSFER VEHICLE APPROACHES INTERNATIONAL SPACE STATION
In this photo taken from the International Space Station, the European Space Agency’s Automated Transfer Vehicle-3 (ATV-3) is seen on approach for docking. The unmanned cargo spacecraft docked to the space station at 6:31 p.m. EDT on March 28, 2012. The ATV-3 delivered 220 pounds of oxygen, 628 pounds of water, 4.5 tons of propellant and nearly 2.5 tons of dry cargo. Among other items, the station crew received experiment hardware, spare parts, food and clothing. The six-member Expedition 30 crew adjusted its sleep schedule to accommodate the ATV-3 docking. The crew stayed up late to monitor the approach and docking. Image Credit: NASA
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