The International Space Station. Credit: NASA
Tuesday, June 12, 2012
Monday, June 11, 2012
NUSTAR, GALACTIC EXPLORER
This photo shows the Orbital Sciences Corporation Pegasus XL rocket with the NuSTAR spacecraft after attachment to the L-1011 carrier aircraft known as "Stargazer." Image credit: NASA/Randy Beaudoin, VAFB
Written on JUNE 10, 2012 AT 7:54 AM by JTOZER
NuStar Headed To The Stars
NASA‘s Nuclear Spectroscopic Teelscope Array, or NuSTAR, is now perched atop its Pegasus XL rocket, strapped to the plane that will carry the mission to an airborne launch. Launch is scheduled for June 13, no earlier than 8:30 a.m. PDT (11:30 a.m. EDT).
The plane — the L-1011 “Stargazer” aircraft — is now at Vandenberg Air Force Base in central California. It is scheduled to fly to Kwajalein Atoll in the central Pacific Ocean from June 5 to 6. About an hour before launch, the plane will lift off from the island, and drop NuSTAR and its rocket over the ocean. The rocket will then ignite, carrying NuSTAR to its final orbit around Earth’s equator.
NuSTAR will be the first space telescope to create sharp images of X-rays with high energies, similar to those used by doctors and dentists. It will conduct a census for black holes, map radioactive material in young supernovae remnants, and study the origins of cosmic rays and extreme physics around collapsed stars.
NuSTAR is a Small Explorer mission led by the California Institute of Technology in Pasadena and managed by NASA’s Jet Propulsion Laboratory, also in Pasadena, for NASA’s Science Mission Directorate in Washington. The spacecraft was built by Orbital Sciences Corporation, Dulles, Va. Launch management and government oversight for the mission is the responsibility of NASA’s Launch Services Program at the Kennedy Space Center in Florida.
Sunday, June 10, 2012
NASA'S SPITZER FINDS FIRST OBJECTS BURNED FURIOUSLY
FROM: NASA
WASHINGTON -- The faint, lumpy glow from the very first objects in the
universe may have been detected with the best precision yet using
NASA's Spitzer Space Telescope. The objects could be wildly massive
stars or voracious black holes. They are too far away to be seen
individually, but Spitzer has captured new, convincing evidence of
what appears to be the collective pattern of their infrared light.
The observations help confirm the first objects were numerous in
quantity and furiously burned cosmic fuel.
"These objects would have been tremendously bright," said Alexander
"Sasha" Kashlinsky of NASA's Goddard Space Flight Center in
Greenbelt, Md., lead author of a new paper appearing in The
Astrophysical Journal. "We can't yet directly rule out mysterious
sources for this light that could be coming from our nearby universe,
but it is now becoming increasingly likely that we are catching a
glimpse of an ancient epoch. Spitzer is laying down a roadmap for
NASA's upcoming James Webb Telescope, which will tell us exactly what
and where these first objects were."
Spitzer first caught hints of this remote pattern of light, known as
the cosmic infrared background, in 2005, and again with more
precision in 2007. Now, Spitzer is in the extended phase of its
mission, during which it performs more in-depth studies on specific
patches of the sky. Kashlinsky and his colleagues used Spitzer to
look at two patches of sky for more than 400 hours each.
The team then carefully subtracted all of the known stars and galaxies
in the images. Rather than being left with a black, empty patch of
sky, they found faint patterns of light with several telltale
characteristics of the cosmic infrared background. The lumps in the
pattern observed are consistent with the way the very distant objects
are thought to be clustered together.
Kashlinsky likens the observations to looking for Fourth of July
fireworks in New York City from Los Angeles. First, you would have to
remove all the foreground lights between the two cities, as well as
the blazing lights of New York City itself. You ultimately would be
left with a fuzzy map of how the fireworks are distributed, but they
would still be too distant to make out individually.
"We can gather clues from the light of the universe's first
fireworks," said Kashlinsky. "This is teaching us that the sources,
or the "sparks," are intensely burning their nuclear fuel."
The universe formed roughly 13.7 billion years ago in a fiery,
explosive Big Bang. With time, it cooled and, by around 500 million
years later, the first stars, galaxies and black holes began to take
shape. Astronomers say some of that "first light" may have traveled
billions of years to reach the Spitzer Space Telescope. The light
would have originated at visible or even ultraviolet wavelengths and
then, because of the expansion of the universe, stretched out to the
longer, infrared wavelengths observed by Spitzer.
The new study improves on previous observations by measuring this
cosmic infrared background out to scales equivalent to two full moons
-- significantly larger than what was detected before. Imagine trying
to find a pattern in the noise in an old-fashioned television set by
looking at just a small piece of the screen. It would be hard to know
for certain if a suspected pattern was real. By observing a larger
section of the screen, you would be able to resolve both small- and
large-scale patterns, further confirming your initial suspicion.
Likewise, astronomers using Spitzer have increased the amount of the
sky examined to obtain more definitive evidence of the cosmic
infrared background. The researchers plan to explore more patches of
sky in the future to gather more clues hidden in the light of this
ancient era.
"This is one of the reason's we are building the James Webb Space
Telescope," said Glenn Wahlgren, Spitzer program scientist at NASA
Headquarters in Washington. "Spitzer is giving us tantalizing clues,
but James Webb will tell us what really lies at the era where stars
first ignited."
Other authors are Richard Arendt of Goddard and the University of
Maryland in Baltimore; Matt Ashby and Giovanni Fazio of the
Harvard-Smithsonian Center for Astrophysics in Cambridge, Mass.; and
John Mather and Harvey Moseley of Goddard. Fazio led the initial
observations of these sky fields.
NASA's Jet Propulsion Laboratory (JPL), Pasadena, Calif., manages the
Spitzer Space Telescope mission for the agency's Science Mission
Directorate in Washington. Science operations are conducted at the
Spitzer Science Center at the California Institute of Technology
(Caltech) 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.
Saturday, June 9, 2012
Friday, June 8, 2012
Thursday, June 7, 2012
VENUS VERSUS THE SOL
FROM: NASA
This image from NASA’s Solar Dynamics Observatory shows Venus as it nears the disk of
The sun on June 5, 2012. Venus’s 2012 transit will be the last such event until 2117. Photo: NASA Solar Dynamics Observatory.
Wednesday, June 6, 2012
RIPPLES IN THE FABRIC OF SPACE EJECT BLACK HOLE FROM A GALAXY
FROM: NASA
GIANT BLACK HOLE KICKED OUT OF HOME GALAXY
WASHINGTON -- Astronomers have found strong evidence that a massive
black hole is being ejected from its host galaxy at a speed of
several million miles per hour. New observations from NASA's Chandra
X-ray Observatory suggest that the black hole collided and merged
with another black hole and received a powerful recoil kick from
gravitational wave radiation.
"It's hard to believe that a supermassive black hole weighing millions
of times the mass of the sun could be moved at all, let alone kicked
out of a galaxy at enormous speed," said Francesca Civano of the
Harvard-Smithsonian Center for Astrophysics (CfA), who led the new
study. "But these new data support the idea that gravitational waves
-- ripples in the fabric of space first predicted by Albert Einstein
but never detected directly -- can exert an extremely powerful
force."
Although the ejection of a supermassive black hole from a galaxy by
recoil because more gravitational waves are being emitted in one
direction than another is likely to be rare, it nevertheless could
mean that there are many giant black holes roaming undetected out in
the vast spaces between galaxies.
"These black holes would be invisible to us," said co-author Laura
Blecha, also of CfA, "because they have consumed all of the gas
surrounding them after being thrown out of their home galaxy."
Civano and her group have been studying a system known as CID-42,
located in the middle of a galaxy about 4 billion light years away.
They had previously spotted two distinct, compact sources of optical
light in CID-42, using NASA's Hubble Space Telescope.
More optical data from the ground-based Magellan and Very Large
Telescopes in Chile supplied a spectrum (that is, the distribution of
optical light with energy) that suggested the two sources in CID-42
are moving apart at a speed of at least 3 million miles per hour.
Previous Chandra observations detected a bright X-ray source likely
caused by super-heated material around one or more supermassive black
holes. However, they could not distinguish whether the X-rays came
from one or both of the optical sources because Chandra was not
pointed directly at CID-42, giving an X-ray source that was less
sharp than usual.
"The previous data told us that there was something special going on,
but we couldn't tell if there were two black holes or just one," said
another co-author Martin Elvis, also of CfA. "We needed new X-ray
data to separate the sources."
When Chandra's sharp High Resolution Camera was pointed directly at
CID-42, the resulting data showed that X-rays were coming only from
one of the sources. The team thinks that when two galaxies collided,
the supermassive black holes in the center of each galaxy also
collided. The two black holes then merged to form a single black hole
that recoiled from gravitational waves produced by the collision,
which gave the newly merged black hole a sufficiently large kick for
it to eventually escape from the galaxy.
The other optical source is thought to be the bright star cluster that
was left behind. This picture is consistent with recent computer
simulations of merging black holes, which show that merged black
holes can receive powerful kicks from the emission of gravitational
waves.
There are two other possible explanations for what is happening in
CID-42. One would involve an encounter between three supermassive
black holes, resulting in the lightest one being ejected. Another
idea is that CID-42 contains two supermassive black holes spiraling
toward one another, rather than one moving quickly away.
Both of these alternate explanations would require at least one of the
supermassive black holes to be very obscured, since only one bright
X-ray source is observed. Thus the Chandra data support the idea of a
black hole recoiling because of gravitational waves.
These results will appear in the June 10 issue of The Astrophysical
Journal.
NASA's Marshall Space Flight Center in Huntsville, Ala., manages the
Chandra Program for the agency's Science Mission Directorate in
Washington. The Smithsonian Astrophysical Observatory in Cambridge,
Mass., controls Chandra's science and flight operations.
Tuesday, June 5, 2012
Monday, June 4, 2012
SPACEX DRAGON CAPSULE RETURNS TO EARTH AFTER FIRST COMMERCIAL FLIGHT TO SPACE STATION
FROM: NASA
HOUSTON -- SpaceX's Dragon capsule splashed down in the Pacific Ocean
at 11:42 a.m. EDT a few hundred miles west of Baja California,
Mexico, marking a successful end to the first mission by a commercial
company to resupply the International Space Station.
"Congratulations to the teams at SpaceX and NASA who worked hard to
make this first commercial mission to the International Space Station
an overwhelming success," NASA Administrator Charles Bolden said.
"This successful splashdown and the many other achievements of this
mission herald a new era in U.S. commercial spaceflight. American
innovation and inspiration have once again shown their great strength
in the design and operation of a new generation of vehicles to carry
cargo to our laboratory in space. Now more than ever we're counting
on the inventiveness of American companies and American workers to
make the International Space Station and other low Earth orbit
destinations accessible to any and all who have dreams of space
travel."
The Dragon capsule will be taken by boat to a port near Los Angeles,
where it will be prepared for a return journey to SpaceX's test
facility in McGregor, Texas, for processing. Some cargo will be
removed at the port in California and returned to NASA within 48
hours. The remainder will be returned to Texas with the capsule.
The capsule delivered to the station 1,014 pounds of supplies
including experiments, food, clothing and technology. On its return
trip to Earth, the capsule carried science experiments that will be
returned to researchers hoping to gain new insights provided by the
unique microgravity environment in the station's laboratories. In
addition to the experiments, Dragon returned a total of 1,367 pounds
of hardware and cargo no longer needed aboard the station.
Dragon's journey to the space station was SpaceX's second
demonstration mission under NASA's Commercial Orbital Transportation
Services (COTS) Program, which provides investments to stimulate the
commercial space industry in America. The mission began May 22 as the
capsule launched from Cape Canaveral Air Force Station in Florida
aboard a SpaceX Falcon 9 rocket. Following a series of tests of its
maneuverability and abort systems, the capsule was grappled and
berthed to the space station by the crew members of Expedition 31
aboard the orbiting complex.
In the next several weeks, NASA will evaluate the Dragon capsule's
mission performance to close out remaining COTS milestones. Once that
work is completed NASA and SpaceX will set the target date for the
company's first full cargo mission.
In addition to fostering the development of new American cargo
vehicles, NASA also is helping spur innovation and development of new
spacecraft and launch vehicles from the commercial industry to
develop safe, reliable and cost-effective capabilities to transport
astronauts to low Earth orbit and the space station.
NASA also is developing the Orion spacecraft and Space Launch System
(SLS), a crew capsule and heavy-lift rocket that will provide an
entirely new capability for human exploration beyond low Earth orbit.
Designed to be flexible for launching spacecraft for crew and cargo
missions, SLS and Orion will expand human presence beyond low Earth
orbit and enable new missions of exploration across the solar system.
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