Wednesday, July 16, 2014

Mysterious X-ray Signal Intrigues Astronomers

Mysterious X-ray Signal Intrigues Astronomers:

Perseus

A new study of the Perseus galaxy cluster, shown in this image, using NASA's Chandra X-ray Observatory and 73 other clusters with ESA's XMM-Newton has revealed a mysterious X-ray signal in the data. This signal is represented in the circled data points in the inset, which is a plot of X-ray intensity as a function of X-ray energy. The signal is also seen in over 70 other galaxy clusters using XMM-Newton. This unidentified X-ray emission line - that is, a spike of intensity at a very specific energy, in this case centered on about 3.56 kiloelectron volts (keV) - requires further investigation to confirm both the signal's existence and nature as described in the latest Chandra press release.

One intriguing possible explanation of this X-ray emission line is that it is produced by the decay of sterile neutrinos, a type of particle that has been proposed as a candidate for dark matter. While holding exciting potential, these results must be confirmed with additional data to rule out other explanations and determine whether it is plausible that dark matter has been observed.

There is uncertainty in these results, in part, because the detection of this emission line is pushing the capabilities of both Chandra and XMM-Newton in terms of sensitivity. Also, there may be explanations other than sterile neutrinos if this X-ray emission line is deemed to be real. For example, there are ways that normal matter in the cluster could have produced the line, although the team's analysis suggested that all of these would involve unlikely changes to our understanding of physical conditions in the galaxy cluster or the details of the atomic physics of extremely hot gases.

This image is Chandra's latest view of the Perseus Cluster, where red, green, and blue show low, medium, and high-energy X-rays respectively. It combines data equivalent to more than 17 days worth of observing time taken over a decade with Chandra. The Perseus Cluster is one of the most massive objects in the Universe, and contains thousands of galaxies immersed in an enormous cloud of superheated gas. In Chandra's X-ray image, enormous bright loops, ripples, and jet-like streaks throughout the cluster can be seen. The dark blue filaments in the center are likely due to a galaxy that has been torn apart and is falling into NGC 1275 (a.k.a. Perseus A), the giant galaxy that lies at the center of the cluster. A different view of Perseus, shown below, combines data from Chandra in the inner regions of the cluster and XMM data in the outer regions.

More at http://chandra.harvard.edu/photo/2014/perseus/

-Megan Watzke, CXC

A Flash in the Dark!

A Flash in the Dark!:

Esra Bulbul
We are delighted to welcome Esra Bulbul as a guest blogger. Esra led the new study reporting evidence for a mysterious X-ray signal in galaxy clusters, leading to our latest press release. She earned her master’s degree in physics from the Middle East Technical University in the capital city, Ankara, in Turkey in 2006. Four years later she graduated with a PhD in physics from the University of Alabama in Huntsville / NASA Marshall Space Flight Center. After receiving her Ph.D. she moved to the Harvard-Smithsonian Center for Astrophysics as a Smithsonian Astrophysical Fellow working jointly at the NASA Goddard Space Flight Center as a visiting scientist. She is now back at the Harvard-Smithsonian Center for Astrophysics and enjoys living in the greater Boston area.

When I started my first postdoc at the Harvard-Smithsonian Center for Astrophysics, I already knew that one alternative way to improve the sensitivity of current instruments like Chandra and XMM-Newton is to “stack” large numbers of observations of galaxy clusters, meaning that we layer one observation on top of another.

The great advantage of stacking observations is not only an increased signal-to-noise ratio (that is, the amount of useful signal compared to background noise), but also the diminished effects of detector and background features. The X-ray background emission and instrumental noise are the main obstacles in the analysis of faint objects, such as galaxy clusters.

I started by examining the large archive of the XMM-Newton satellite. After 15 years of operation, both XMM-Newton and Chandra have collected large amounts of data, which made this work possible. My primary goal was to refine previous upper limits on the properties of dark matter particles and maybe to find a weak emission line from a metal, which was not detected previously.

These weak emission lines from metals originate from the known atomic transitions taking place in the hot atmospheres of galaxy clusters. After spending a year reducing, carefully examining, and stacking the XMM-Newton X-ray observations of 73 galaxy clusters, I noticed an unexpected emission line at about 3.56 kiloelectron volts (keV), a specific energy in the X-ray range.

I remember being so puzzled when I first saw the line. Its wavelength did not correspond to any of the known atomic transitions. I remember running to my collaborator's office with excitement to show this new emission line. A second surprise came from my doctor at the time. I learned that I was pregnant with my first baby.

Perseus

To convince myself that this line is not an XMM-Newton artifact I have further investigated the Chandra X-ray observations of the bright core of the Perseus Cluster. The line was also detected in these observations, confirming that it is not an instrumental feature. The next goal was to find the origin of this new line.

My team and I came up with a few astrophysical processes, which could explain this line. We went through these processes one by one carefully. However none of them could produce an emission line at 3.56 keV. Since 80% of galaxy clusters consists of dark matter, one possibility we considered was the decay signature of sterile neutrinos.

According to theory, a well-motivated warm dark matter candidate – a sterile neutrino – decays into an active neutrino by emitting an X-ray photon in the keV range. This X-ray photon can be detectable through X-ray spectroscopy. We found that our results indeed were consistent with the theoretical expectations and the upper limits placed by previous X-ray searches.

It took me a year to confirm the existence of the line in different subsamples and write the paper. Within a few hours of having submitted the paper to ApJ and posted it to the archive, I ran to the hospital and I delivered my baby, Adrian Batu. It was the most rewarding time of my life; I had two babies in a few days.

What is next? Since this line is weak, it is important to confirm it with other satellites. I received a NASA grant to continue searching for this line in the accumulated observations of galaxy clusters with Suzaku, a Japanese X-ray satellite that specializes in looking at the spectra from objects in space. At this point, it is still early to tell if this line originates from dark matter. The next Japanese X-ray mission, Astro-H, will fly in 2015 carrying a high-resolution instrument. With its ability to see better detail in the spectra, we hope we will be able to unambiguously distinguish an astrophysical line from a dark matter signal and tell us what this new X-ray emission truly is.

Nanda Rea Wins Award for Solving a Magnetic Mystery

Nanda Rea Wins Award for Solving a Magnetic Mystery:

posted by chandra
on Tue, 2014-07-01 10:45


Nanda Rea

Nanda Rea. Credit: N. Rea
Last week, the Committee on Space Research (COSPAR) announced the awards that will be presented at their upcoming meeting in August in Moscow. One of the winners of the Yakov B. Zeldovich Medals -- a joint award of COSPAR and the Russian Academy of Sciences conferred on young scientists for excellence and achievements – will go to Nanda Rea.

Dr. Rea is an assistant professor at the Institute of Space Sciences (CSIC-IEEC) in Barcelona and the Anton Pannekoek Institute (API) at the University of Amsterdam. She has spent much of her career studying magnetars, a special class of neutron stars that have some of the strongest magnetic fields in the Universe.

Chandra
Artist's impression of a magnetar. Credit: N. Rea

Dr. Rea has used many high-energy astrophysics to conduct her research including those from NASA like Chandra, Swift, RXTE, and Fermi as well as ESA missions such as XMM-Newton and INTEGRAL. For instance, we were able to highlight some of her work with Chandra in a press release last year. We want to extend our congratulations to Dr. Rea on this exciting award and we look forward to seeing where her research takes her next.

For ESA’s press release on this award, including a photo of Dr. Rea, visit http://sci.esa.int/xmm-newton/54215-award-for-european-scientist-who-solved-a-magnetic-mystery/

-Megan Watzke, CXC
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Galactic Pyrotechnics On Display

Galactic Pyrotechnics On Display:

M106

A galaxy about 23 million light years away is the site of impressive, ongoing, fireworks. Rather than paper, powder, and fire, this galactic light show involves a giant black hole, shock waves, and vast reservoirs of gas.

This galactic fireworks display is taking place in NGC 4258 (also known as M106), a spiral galaxy like the Milky Way. This galaxy is famous, however, for something that our Galaxy doesn’t have – two extra spiral arms that glow in X-ray, optical, and radio light. These features, or anomalous arms, are not aligned with the plane of the galaxy, but instead intersect with it.

The anomalous arms are seen in this new composite image of NGC 4258, where X-rays from NASA’s Chandra X-ray Observatory are blue, radio data from the NSF’s Karl Jansky Very Large Array are purple, optical data from NASA’s Hubble Space Telescope are yellow and blue, and infrared data from NASA’s Spitzer Space Telescope are red.

A new study of these anomalous arms made with Spitzer shows that shock waves, similar to sonic booms from supersonic planes, are heating large amounts of gas – equivalent to about 10 million Suns. What is generating these shock waves? Radio data shows that the supermassive black hole at the center of NGC 4258 is producing powerful jets of high-energy particles. Researchers think that these jets strike the disk of the galaxy and generate shock waves. These shock waves, in turn, heat some of the gas – composed mainly of hydrogen molecules – to thousands of degrees. As shown in our additional, composite image, part of the evidence for this heating process comes from the similarity in location between the hydrogen and X-ray emission, both thought to be caused by shocks, and the radio jets.

The Chandra X-ray image reveals huge bubbles of hot gas above and below the plane of the galaxy. These bubbles indicate that much of the gas that was originally in the disk of the galaxy has been heated to millions of degrees and ejected into the outer regions by the jets from the black hole.

The ejection of gas from the disk by the jets has important implications for the fate of this galaxy. Researchers estimate that all of the remaining gas will be ejected within the next 300 million years – very soon on cosmic time scales – unless it is somehow replenished. Because most of the gas in the disk has already been ejected, less gas is available for new stars to form. Indeed, the researchers used Spitzer data to estimate that stars are forming in the central regions of NGC 4258, at a rate which is about ten times less than in the Milky Way Galaxy.

The European Space Agency’s Herschel Space Observatory was used to confirm the estimate from Spitzer data of the low star formation rate in the central regions of NGC 4258. Herschel was also used to make an independent estimate of how much gas remains in the center of the galaxy. After allowing for the large boost in infrared emission caused by the shocks, the researchers found that the gas mass is ten times smaller than had been previously estimated.

Because NGC 4258 is relatively close to Earth, astronomers can study how this black hole is affecting its galaxy in great detail. The supermassive black hole at the center of NGC 4258 is about ten times larger than the one in the Milky Way, and is also consuming material at a faster rate, potentially increasing its impact on the evolution of its host galaxy.

These results were published in the June 20th, 2014 issue of The Astrophysical Journal Letters and are available online. The authors are Patrick Ogle, Lauranne Lanz and Philip Appleton from the California Institute of Technology in Pasadena, CA.

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 in Cambridge, Mass., controls Chandra's science and flight operations.

More information at http://chandra.harvard.edu/photo/2014/m106/index.html
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M27 Dumbbell Nebula 30 Sep 13

M27 Dumbbell Nebula 30 Sep 13:



M27 Dumbbell Nebula 30 Sep 13

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Rayos crepusculares

Rayos crepusculares:



Rayos crepusculares

La mancha gris en el horizonte es una tormenta de polvo.

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Luminous River

Luminous River:



Luminous River

Milkyway Queensland

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iLUNAnati!

iLUNAnati!:



iLUNAnati!

Taken on 7/13/14



Image Specs:



Camera: Canon EOS 60D

Scope: Stellarvue SV105T APO

______________________________________________



Show some love for this image and please vote for it in the Space.com Supermoon Photo Contest!



Click on the link below. Then view the Supermoon gallery.



Check out my image titled "iLUNAnati" by Maxwell FX Palau and cast your vote.



It is that simple. Thanks for your support!



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Rising Moon 15 July 2014

Rising Moon 15 July 2014:



Rising Moon 15 July 2014

23.25

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Waning Gibbous Moon 16 July 2014

Waning Gibbous Moon 16 July 2014:



Waning Gibbous Moon 16 July 2014

01.46

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Lightning Strike Across the Coral Sea plus Flash Illuminated Bird in Flight - Nov 26, 2008

Lightning Strike Across the Coral Sea plus Flash Illuminated Bird in Flight - Nov 26, 2008:



Lightning Strike Across the Coral Sea plus Flash Illuminated Bird in Flight - Nov 26, 2008

Taken from Coral Towers Observatory using a Canon 20D and 24 mm lens. Single 4 sec exposure. This image has been reporcessed using Photomatrix.

NOTE

The image includes a bird flying away from the storm just above the water line (below and to the right of centre) that has been flash illuminated by the lightning.

Original enclosures:
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Universe Astrophoto 20140715 Moon

20140715 Moon:

Roger Hutchinson has added a photo to the pool:

20140715 Moon

Moon on 15th July 2014 - 600mm telephoto

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Feel The Heat! New Mars Map Shows Differences Between Bedrock And Sand

Feel The Heat! New Mars Map Shows Differences Between Bedrock And Sand:



An impact crater on Mars called Graterri, which is only 4.3 miles (6.9 km) in diameter, shines in a global heat map of the Red Planet produced in 2014. Credit: NASA/JPL-Caltech/Arizona State University

An impact crater on Mars called Graterri, which is only 4.3 miles (6.9 km) in diameter, shines in a global heat map of the Red Planet produced in 2014. Credit: NASA/JPL-Caltech/Arizona State University
For years, NASA’s Mars Odyssey has been working on some night moves. It’s been taking pictures of the Red Planet during nighttime — more than 20,000 in all — to see how the planet’s heat signature looks while the sun is down.

The result is the highest-resolution map ever of the thermal properties of Mars, which you can see here. Why is this important? Researchers say it helps tell the story about things such as if an area is shrouded with dust, where bare bedrock is, and whether sediments in a crater are packed tight or floating freely.

“Darker areas in the map are cooler at night, have a lower thermal inertia and likely contain fine particles, such as dust, silt or fine sand,” stated Robin Fergason at the USGS Astrogeology Science Center in Arizona, who led the map’s creation. Brighter areas are warmer, likely yielding regions of bedrock, crust or coarse sand.

The map from Odyssey’s Thermal Emission Imaging System (THEMIS) is also used for a more practical purpose: deciding where to set down NASA’s next Mars mission.

After assisting in landing site selection for the Curiosity mission, the THEMIS data will be used to figure out where the Mars 2020 rover will be placed, Arizona State University stated.

You can check out more recent THEMIS images (updated daily) on this website.

Source: Arizona State University

Tagged as:
Mars Odyssey,
THEMIS

Ancient Snow Shaped A Martian Basin That’s Half The Size Of Brazil

Ancient Snow Shaped A Martian Basin That’s Half The Size Of Brazil:



Perspective view of Hellas Basin taken with the High Resolution Stereo Camera on ESA’s Mars Express in January 2014, and released in July 2014. Credit: ESA/DLR/FU Berlin

Perspective view of Hellas Basin taken with the High Resolution Stereo Camera on ESA’s Mars Express in January 2014, and released in July 2014. Credit: ESA/DLR/FU Berlin
Such great heights! A mountain chain peeks in the background of this new view of Hellas Basin, based on information taken by a European spacecraft circling the Red Planet.

Beyond the pretty picture is a tale of how snow behaved on the Martian surface, according to the European Space Agency. The vast basin is about half the size of Brazil.

The wrinkled view of that crater in front is a product of snowing and freezing that took place when the Martian surface was wetter, ESA said.

A map of the Hellas basin in the southern hemisphere of Mars, as well as the rocky Hellespontus Montes. Image taken by the High Resolution Stereo Camera on ESA’s Mars Express. Credit: NASA MGS MOLA Science Team/Freie Universitaet Berlin

A map of the Hellas basin in the southern hemisphere of Mars, as well as the rocky Hellespontus Montes. Image taken by the High Resolution Stereo Camera on ESA’s Mars Express. Credit: NASA MGS MOLA Science Team/Freie Universitaet Berlin
“During this period, snow fell and covered the surface and later moved downhill into the crater. Once inside the crater, the snow became trapped and soon covered by surface dust, before compacting to form ice. The number of concentric lines indicates many cycles of this process and it is possible that craters like these may still be rich in ice hidden beneath just tens of metres of surface debris.”

Additionally, the high hill chain in the back (called Hellespontus Montes) is a remnant of how Hellas basin was formed, the agency said.

“This feature is a product of the final stages of the formation of the vast Hellas impact basin itself, most likely as the basin walls – which were first pushed outwards by the extraordinary forces at work during the formation of the basin – later collapsed and sank inwards to create the observed stair-stepped shape.”

The image was taken by ESA’s Mars Express spacecraft, which is just one of several robotic emissaries circling the Red Planet.

Source: European Space Agency

Tagged as:
Hellas Basin,
Mars Express

What Created This Huge Crater In Siberia?

What Created This Huge Crater In Siberia?:



An 80-meter-wide crater recently discovered in  northern Siberia (Video screenshot)

An 80-meter-wide crater recently discovered in northern Siberia (video screenshot)
What is it with Russia and explosive events of cosmic origins? The 1908 Tunguska Explosion, the Chelyabinsk bolide of February 2013, and now this: an enormous 80-meter wide crater discovered in the Yamal peninsula in northern Siberia!

To be fair, this crater is not currently thought to be from a meteorite impact but rather an eruption from below, possibly the result of a rapid release of gas trapped in what was once frozen permafrost. The Yamal region is rich in oil and natural gas, and the crater is located 30 km away from its largest gas field. Still, a team of researchers are en route to investigate the mysterious hole further.

Watch a video captured by engineer Konstantin Nikolaev during a helicopter flyover below:



In the video the Yamal crater/hole has what appear to be streams of dry material falling into it. Its depth has not yet been determined.

Bill Chappell writes on NPR’s “The Two-Way”:

“The list of possible natural explanations for the giant hole includes a meteorite strike and a gas explosion, or possibly an eruption of underground ice.”
Dark material around the inner edge of the hole seems to suggest high temperatures during its formation. But rather than the remains of a violent impact by a space rock — or the crash-landing of a UFO, as some have already speculated — this crater may be a particularly explosive result of global warming.

According to The Siberian Times:

“Anna Kurchatova from Sub-Arctic Scientific Research Centre thinks the crater was formed by a water, salt and gas mixture igniting an underground explosion, the result of global warming. She postulates that gas accumulated in ice mixed with sand beneath the surface, and that this was mixed with salt – some 10,000 years ago this area was a sea.”
The crater is thought to have formed sometime in 2012.

Read more at The Siberian Times and NPR.

Tagged as:
crater,
explosion,
global warming,
hole,
impact,
meteorite,
Siberia,
sinkhole,
Yamal

Cygnus Commercial Resupply Ship Berths to Space Station on 45th Apollo 11 Anniversary

Cygnus Commercial Resupply Ship Berths to Space Station on 45th Apollo 11 Anniversary:



The International Space Station's robotic arm, Canadarm2, grapples the Orbital Sciences' Cygnus cargo craft on July 16, 2014. Image Credit: NASA TV

The International Space Station’s robotic arm, Canadarm2, grapples the Orbital Sciences’ Cygnus cargo craft on July 16, 2014. Image Credit: NASA TV
Following a nearly three day journey, an Orbital Sciences Corp. Cygnus commercial cargo freighter carrying a ton and a half of science experiments and supplies for the six person crew was successfully installed onto the International Space Station at 8:53 a.m. EDT this morning, July 16, after a flawless arrival and being firmly grasped by station astronauts deftly maneuvering the Canadarm2 robotic arm some two hours earlier.

Cygnus was captured in open space at 6:36 a.m. EDT by Commander Steve Swanson as he maneuvered the 57-foot (17-meter) Canadarm2 from a robotics workstation inside the station’s seven windowed domed Cupola, after it was delicately flown on an approach vector using GPS and LIDAR lasers to within about 32 feet (10 meters) of the massive orbiting complex.

Swanson was assisted by ESA astronaut and fellow Expedition 40 crew member Alexander Gerst working at a hardware control panel.

“Grapple confirmed” radioed Houston Mission Control as the complex soared in low orbit above Earth at 17500 MPH.

“Cygnus is captured as the ISS flew 260 miles (400 km) over northern Libya.”

Orbital Sciences' Cygnus cargo craft approaches the ISS on July 16, 2014 prior to Canadarm2  grappling and berthing.  Credit: NASA TV

Orbital Sciences’ Cygnus cargo craft approaches the ISS on July 16, 2014 prior to Canadarm2 grappling and berthing. Credit: NASA TV
Cygnus by the book arrival at the million pound orbiting laboratory coincided with the 45th anniversary of the launch of Apollo 11 on July 16, 1969 on America’s first manned moon landing mission.

This mission dubbed Orbital-2, or Orb-2, marks the second of eight operational cargo resupply missions to the ISS under Orbital’s Commercial Resupply Services (CRS) contract with NASA.

The supplies are critical to keep the station flying and humming with research investigations.

Up-close side view of payload fairing protecting Cygnus cargo module during launch for Orb-2 mission to ISS. Vehicle undergoes prelaunch processing at NASA Wallops during visit by Universe Today/Ken Kremer.  Credit: Ken Kremer - kenkremer.com

Up-close side view of payload fairing protecting Cygnus cargo module during launch for Orb-2 mission to ISS. Vehicle undergoes prelaunch processing at NASA Wallops during visit by Universe Today/Ken Kremer. Credit: Ken Kremer – kenkremer.com
The supply ship thrusters all worked perfectly normal during rendezvous and docking to station with streaming gorgeous views provided by the stations new high definition HDEV cameras.

“We now have a seventh crew member. Janice Voss is now part of Expedition 40,” radioed Swanson.

“Janice devoted her life to space and accomplished many wonderful things at NASA and Orbital Sciences, including five shuttle missions. And today, Janice’s legacy in space continues. Welcome aboard the ISS, Janice.”

The Cygnus spacecraft was christened in honor of Janice Voss who flew five shuttle missions during her prolific astronaut carrier, worked for both NASA and Orbital Sciences and passed away in February 2012.

Orbital Sciences' Cygnus cargo craft approaches the ISS on July 16, 2014 prior to Canadarm2  grappling and berthing.  Credit: NASA TV

Orbital Sciences’ Cygnus cargo craft approaches the ISS on July 16, 2014 prior to Canadarm2 grappling and berthing. Credit: NASA TV
A robotics officer at Mission Control in Houston then remotely commanded the arm to move Cygnus into place for its berthing at the Earth-facing port on the Harmony module.

Once Cygnus was in place at the ready to latch (RTF) position, NASA astronaut and Flight Engineer Reid Wiseman monitored the Common Berthing Mechanism operations and initiated the first and second stage capture of the cargo ship to insure the craft was firmly joined.

The hard mate was completed at 8:53 a.m. EDT as the complex was flying about 260 miles over the east coast of Australia. 16 bolts were driven to firmly hold Cygnus in place to the station.

“Cygnus is now bolted to the ISS while flying 260 miles about the continent of Australia,” confirmed Houston Mission Control.

Orbital Sciences Corporation Antares rocket and Cygnus spacecraft blasts off on July 13  2014 from Launch Pad 0A at NASA Wallops Flight Facility , VA, on the Orb-2 mission and loaded with over 3000 pounds of science experiments and supplies for the crew aboard the International Space Station.  Credit: Ken Kremer - kenkremer.com

Orbital Sciences Corporation Antares rocket and Cygnus spacecraft blasts off on July 13, 2014 from Launch Pad 0A at NASA Wallops Flight Facility , VA, on the Orb-2 mission and loaded with over 3000 pounds of science experiments and supplies for the crew aboard the International Space Station. Credit: Ken Kremer – kenkremer.com
Cygnus roared to orbit during a spectacular blastoff on July 13 atop an Orbital Sciences Corp. Antares rocket on the Orb-2 mission at 12:52 p.m. (EDT) from the beachside Pad 0A at the Mid-Atlantic Regional Spaceport on NASA’s Wallops Flight Facility on the Eastern Shore of Virginia.

The US/Italian built pressurized Cygnus cargo freighter delivered 1,657 kg (3653 lbs) of cargo to the ISS Expedition 40 crew including over 700 pounds (300 kg) of science experiments and instruments, crew supplies, food, water, computer equipment, spacewalk tools and student research experiments.

Student Space Flight teams at NASA Wallops.  Science experiments from these students representing 15 middle and high schools across  America were selected to fly aboard the Orbital Sciences Cygnus Orb-2 spacecraft which launched to the ISS from NASA Wallops, VA, on July 13, 2014, as part of the Student Spaceflight Experiments Program (SSEP).  Credit: Ken Kremer - kenkremer.com

Student Space Flight teams at NASA Wallops

Science experiments from these students representing 15 middle and high schools across America were selected to fly aboard the Orbital Sciences Cygnus Orb-2 spacecraft which launched to the ISS from NASA Wallops, VA, on July 13, 2014, as part of the Student Spaceflight Experiments Program (SSEP). Credit: Ken Kremer – kenkremer.com
The crew will begin work today to remove the Centerline Berthing Camera System that provided the teams with a view of berthing operations through the hatch window.

Swanson will then pressurize and outfit the vestibule area between Harmony and Cygnus. After conducting leak checks they will open the hatch to Cygnus either later today or tomorrow and begin the unloading process, including retrieving a stash of highly desired fresh food.

The wide ranging science cargo and experiments includes a flock of 28 Earth imaging nanosatellites and deployers, student science experiments and small cubesat prototypes that may one day fly to Mars.

“Every flight is critical,” said Frank Culbertson, Orbital’s executive vice president of the advanced programs group, at a post launch briefing at NASA Wallops. Culbertson was a NASA shuttle commander and also flew aboard the International Space Station (ISS).

“We carry a variety of types of cargo on-board, which includes food and basic supplies for the crew, and also the research.”

The cargo mission was crucial since the crew supply margin would have turned uncomfortably narrow by the Fall of 2014.

Cygnus will remain attached to the station approximately 30 days until August 15.

For the destructive and fiery return to Earth, the crew will load Cygnus with approximately 1,340 kg (2950 lbs) of trash for disposal upon atmospheric reentry over the Pacific Ocean approximately five days later after undocking.

The Orb-2 launch was postponed about a month from June 9 to conduct a thorough re-inspection of the two Russian built and US modified Aerojet AJ26 engines that power the rocket’s first stage after a test failure of a different engine on May 22 at NASA’s Stennis Space Center in Mississippi resulted in extensive damage.

The July 13 liftoff marked the fourth successful launch of the 132 foot tall Antares in the past 15 months, Culbertson noted.

The first Antares was launched from NASA Wallops in April 2013. And the Orb-2 mission also marks the third deployment of Cygnus in less than a year.

Orbital Sciences was awarded a $1.9 Billion supply contract by NASA to deliver 20,000 kilograms (44,000 pounds) of research experiments, crew provisions, spare parts and hardware for 8 flights to the ISS through 2016 under the Commercial Resupply Services (CRS) initiative.

Stay tuned here for Ken’s continuing ISS, OCO-2, GPM, Curiosity, Opportunity, Orion, SpaceX, Boeing, Orbital Sciences, MAVEN, MOM, Mars and more Earth & Planetary science and human spaceflight news.



Tagged as:
alexander gerst,
Antares rocket,
apollo 11 mission,
Canadarm2,
commercial cargo,
commercial resupply services (CRS),
CRS,
Cygnus cargo vessel,
International Space Station (ISS),
ISS,
NASA,
Orb-2,
Orbital Sciences Corporation,
reid wiseman,
steve swanson

DARPA’s Experimental Space Plane XS-1 Starts Development

DARPA’s Experimental Space Plane XS-1 Starts Development:



Concept images for DARPA’s Experimental Spaceplane (XS-1) program. Credit: DARPA.

Concept images for DARPA’s Experimental Spaceplane (XS-1) program. Credit: DARPA.
The Defense Advanced Research Projects Agency (DARPA) is looking to develop a fully-reusable unmanned spaceplane, and they are now ready to start working their proposed Experimental Spaceplane (XS-1). The agency has put together a “special forces” of sorts in the space industry, awarding prime contracts for the first phase of development to a combination of six companies. These six are a combination of “old” and “new” space companies and are:



The Boeing Company (working with Blue Origin, LLC)

Masten Space Systems (working with XCOR Aerospace)

Northrop Grumman Corporation (working with Virgin Galactic)

“We chose performers who could prudently integrate existing and up-and-coming technologies and operations, while making XS-1 as reliable, easy-to-use and cost-effective as possible,” Jess Sponable, DARPA program manager. “We’re eager to see how their initial designs envision making spaceflight commonplace—with all the potential military, civilian and commercial benefits that capability would provide.”



Each commercial entity will be able to outline their vision of the XS-1, but DARPA wants the the spaceplane to provide aircraft-like access to space for deploying small satellites to orbit and it its development, they’d like to create technology for next-generation hypersonic vehicles, — and do it more affordably.

They envision that a reusable first stage would fly to hypersonic speeds at a suborbital altitude. Then, one or more expendable upper stages would separate and deploy a satellite into low Earth orbit (LEO). The reusable first stage would then return to earth, land and be prepared for the next flight.

Key to the development, DARPA says, are modular components, durable thermal protection systems and automatic launch, flight and recovery systems that should significantly reduce logistical needs, enabling rapid turnaround between flights.

DARPA’s key technical goals for the XS-1 include flying 10 times in 10 days, flying to Mach 10+ at least once and launching a representative small payload to orbit. The program also seeks to reduce the cost of access to space for 3,000- to 5,000-pound payloads to less than $5 million per flight.

Source: DARPA

Tagged as:
DARPA,
XS-1

Tuesday, July 15, 2014

Into The Black? Maybe Radio Bursts Are From Outside The Galaxy After All, Study Says

Into The Black? Maybe Radio Bursts Are From Outside The Galaxy After All, Study Says:



Image of the sky where the radio burst FRB 121102 was found, in the constellation Auriga. You can see its location with a green circle. At left is supernova remnant S147 and at right, a star formation area called IC 410. Credit: Rogelio Bernal Andreo (DeepSkyColors.com)

Image of the sky where the radio burst FRB 121102 was found, in the constellation Auriga. You can see its location with a green circle. At left is supernova remnant S147 and at right, a star formation area called IC 410. Credit: Rogelio Bernal Andreo (DeepSkyColors.com)
Where are these radio bursts coming from? Astronomers have heard these signals from the sky several times, but always with the same telescope (Parkes Observatory in Australia). There was debate about whether these were coming from inside or outside the galaxy, or even from Earth itself (given only the one observatory was detecting them.)

A new study with a different telescope, the Arecibo Observatory in Puerto Rico, concludes that the bursts are from outside the galaxy. This is the first time one of these bursts have been found in the northern hemisphere of the sky.

“Our result is important because it eliminates any doubt that these radio bursts are truly of cosmic origin,” stated Victoria Kaspi, an astrophysics researcher at McGill University who participated in the research. “The radio waves show every sign of having come from far outside our galaxy – a really exciting prospect.”

Fast radio bursts are a flurry of radio waves that last a few thousandths of a second, and at any given minute there are only seven of these in the sky on average, according to the Max Planck Institute for Radio Astronomy. Their cause is unknown. They could be anything from black holes, to neutron stars coming together, to the magnetic field of pulsars (a type of neutron star) flaring up — or something else.

Arecibo Observatory in Puerto Rico. Credit: NAIC - Arecibo Observatory, a facility of the NSF

Arecibo Observatory in Puerto Rico. Credit: NAIC – Arecibo Observatory, a facility of the NSF
The pulse was found Nov. 2, 2012 in the constellation Auriga. Astronomers believe it is from quite far away from measuring its plasma dispersion, or the slowdown of radio waves as they crash into interstellar electrons. This particular source had triple the maximum dispersion than what would be found inside the galaxy, astronomers stated.

“The brightness and duration of this event, and the inferred rate at which these bursts occur, are all consistent with the properties of the bursts previously detected by the Parkes telescope in Australia,” stated Laura Spitler, who led the research. (She was at Cornell University when the study began, but is now at the Max Planck Institute for Radio Astronomy in Bonn, Germany.)

But other research has been back-and-forth on whether these are actually extragalactic bursts. One 2013 paper supposed it could be colliding neutron stars from far away, while another said it could instead be nearby stars flaring up.

The research was published in the Astrophysical Journal and is also available in preprint version on Arxiv.

Source: McGill University and the Max Planck Institute for Radio Astronomy

Tagged as:
arecibo observatory,
fast radio burst,
radio burst

Your Weekend ‘SuperMoon’ Photos from Around the World

Your Weekend ‘SuperMoon’ Photos from Around the World:



The big proxigean full Moon rises over Daganzo de Arriba, near Madrid, Spain on July 12, 2014. Credit and copyright: Alvaro Ibañez Perez.

The big proxigean full Moon rises over Daganzo de Arriba, near Madrid, Spain on July 12, 2014. Credit and copyright: Alvaro Ibañez Perez.
Did you hear there was something special about the full Moon this weekend… that it would be, well… really super? I heard about it on every newscast I watched or listened to. Even xkcd got into the ‘Supermoon’ craze. The July “Buck” Moon was the first of three Supermoons on tap for 2014, where the Moon is at its perigee, the closest point to Earth in its orbit, close to the time when it is “officially” full.

If you didn’t hear about it, (or weren’t paying attention) you may not have noticed anything different, as its not radically different from a regular full Moon. Read all the detail of what a Supermoon is here. But as Geoff Chester of the US Naval Observatory, said on NASA’s website, “However, if it gets people out and looking at the night sky and maybe hooks them into astronomy, then it’s a good thing,”

And people were out with their cameras, too! Here’s a great collection of full Moon images from this weekend, as seen in our Flickr Gallery.

An over-exposed beauty showing the full Moon rising through the clouds on July 12, 2014 near  Bromsgrove, England, United Kingdom. Credit and copyright: Sarah and Simon Fisher.

An over-exposed beauty showing the full Moon rising through the clouds on July 12, 2014 near Bromsgrove, England, United Kingdom. Credit and copyright: Sarah and Simon Fisher.
The rising "super moon" of July 12, 2014, rising above a canola field in southern Alberta, Canada.  Credit and copyright: Alan Dyer/Amazing Sky Photography.

The rising “super moon” of July 12, 2014, rising above a canola field in southern Alberta, Canada. Credit and copyright: Alan Dyer/Amazing Sky Photography.
A Mississippi Super Moonscape on July 12, 2014. Credit and Copyright: Veronica M Photography.

A Mississippi Super Moonscape on July 12, 2014. Credit and Copyright: Veronica M Photography.
The 'Supermoon' setting on the morning of July 13, 2014 at around 6 am local time near Kapiolani, Honolulu, Hawaii. Credit and copyright:  Henry Weiland.

The ‘Supermoon’ setting on the morning of July 13, 2014 at around 6 am local time near Kapiolani, Honolulu, Hawaii. Credit and copyright: Henry Weiland.
A 3-exoposure of the full Moon on July 12, 2014, taken near Cap-Rouge, Quebec City, Quebec, Canada. Credit and copyright:  Denis Marquis.

A 3-exoposure of the full Moon on July 12, 2014, taken near Cap-Rouge, Quebec City, Quebec, Canada. Credit and copyright: Denis Marquis.
The July 12, 2014 Supermoon or perigee full moon shares the night sky with fireworks from a display in Chester, New York. Credit and copyright: Tom Bushey.

The July 12, 2014 Supermoon or perigee full moon shares the night sky with fireworks from a display in Chester, New York. Credit and copyright: Tom Bushey.
Moonrise with a flyby. July 13, 2014 from the UK. Credit and copyright: SculptorLil on Flickr.

Moonrise with a flyby. July 13, 2014 from the UK. Credit and copyright: SculptorLil on Flickr.
The rising waning Moon on July 13, 2014, from near Bedfordshire, UK. Credit and copyright: DawnSunrise on Flickr.

The rising waning Moon on July 13, 2014, from near Bedfordshire, UK. Credit and copyright: DawnSunrise on Flickr.
Thanks to everyone who submitted images! Check out even more great images in Universe Today’s Flickr Group!



Be advised that this month’s big full Moon was not the closest of the year. The closest Full Moon of 2014 occurs next month on August 10th at 18:11 Universal Time (UT) or 1:44 PM EDT. On that date, the Moon reaches perigee or its closest approach to the Earth at 356,896 kilometres distant at 17:44, less than an hour from Full.

Tagged as:
Moon,
Supermoon,
supermoon 2014

SpaceX Launches Six Commercial Satellites on Falcon 9; Landing Test Ends in “Kaboom”

SpaceX Launches Six Commercial Satellites on Falcon 9; Landing Test Ends in “Kaboom”:





SpaceX successfully launched six ORBCOMM advanced telecommunications satellites into orbit on Monday, July 14, to significantly upgrade the speed and capacity of their existing data relay network. The launch had been delayed or scrubbed several times since the original launch date in May due to varying problems from payload integration issues, weather conditions and issues with the Falcon 9 rocket. But the launch went off without a hitch today and ORBCOMM reports that all six satellites have been successfully deployed in orbit.

SpaceX also used this launch opportunity to try and test the reusability of the Falcon 9?s first stage and its landing system while splashing down in the ocean. While SpaceX CEO Elon Musk reported that the rocket booster reentry, landing burn and leg deployment worked well, the hull of the first stage “lost integrity right after splashdown (aka kaboom),” Musk tweeted. “Detailed review of rocket telemetry needed to tell if due to initial splashdown or subsequent tip over and body slam.”



Screenshot from the SpaceX webcast of the Falcon 9 launch on July 14, 2013.

Screenshot from the SpaceX webcast of the Falcon 9 launch on July 14, 2013.


SpaceX wanted to test the “flyback” ability to the rocket, slowing down the descent of the rocket with thrusters and deploying the landing legs for future launches so the first stage can be re-used. These tests have the booster “landing” in the ocean. The previous test of the landing system was successful, but the choppy seas destroyed the stage and prevented recovery. Today’s “kaboom” makes recovery of even pieces of this booster unlikely.






As far as the ORBCOMM satellites, the six satellites launched today are the first part of what the company hopes will be a 17-satellite constellation. They hope to have all 17 satellites in orbit by the end of the 2014.

Tagged as:
Falcon 9,
launches,
ORBCOMM,
SpaceX

The Search for Alien Life Could Get A Boost From NASA’s Next-Generation Rocket

The Search for Alien Life Could Get A Boost From NASA’s Next-Generation Rocket:



Artist's conception of NASA's Space Launch System. Credit: NASA

Artist’s conception of NASA’s Space Launch System. Credit: NASA
In three years, NASA is planning to light the fuse on a huge rocket designed to bring humans further out into the solar system.

We usually talk about SLS here in the context of the astronauts it will carry inside the Orion spacecraft, which will have its own test flight later in 2014. But today, NASA advertised a possible other use for the rocket: trying to find life beyond Earth.

At a symposium in Washington on the search for life, NASA associate administrator John Grunsfeld said SLS could serve two major functions: launching bigger telescopes, and sending a mission on an express route to Jupiter’s route Europa.

The James Webb Space Telescope, with a mirror of 6.5 meters (21 feet), will in part search for exoplanets after its launch in 2018. Next-generation telescopes of 10 to 20 meters (33 to 66 feet) could pick out more, if SLS could bring them up into space.

“This will be a multi-generational search,” said Sara Seager, a planetary scientist and physicist at the Massachusetts Institute of Technology. She added that the big challenge is trying to distinguish a planet like Earth from the light of its parent star; the difference between the two is a magnitude of 10 billion. “Our Earth is actually extremely hard to find,” she said.

Much like our solar system, Kepler-62 is home to two habitable zone worlds. The small shining object seen to the right of Kepler-62f is Kepler-62e. Orbiting on the inner edge of the habitable zone, Kepler-62e is roughly 60 percent larger than Earth. Image credit: NASA Ames/JPL-Caltech.

Much like our solar system, Kepler-62 is home to two habitable zone worlds. The small shining object seen to the right of Kepler-62f is Kepler-62e. Orbiting on the inner edge of the habitable zone, Kepler-62e is roughly 60 percent larger than Earth. Image credit: NASA Ames/JPL-Caltech.
While the symposium was not talking much about life in the solar system, Europa is considered one of the top candidates due to the presence of a possible subsurface ocean beneath its ice. NASA is now seeking ideas for a mission to this moon, following news that water plumes were spotted spewing from the moon’s icy south pole. A mission to Europa would take seven years with the technology currently in NASA’s hands, but the SLS would be powerful enough to speed up the trip to only three years, Grunsfeld said.

And that’s not all that SLS could do. If it does bring astronauts deeper in space as NASA hopes it will, this opens up a range of destinations for them to go to. Usually NASA talks about this in terms of its human asteroid mission, an idea it has been working on and pitching for the past year to a skeptical, budget-conscious Congress.

But in passing, John Mather (NASA’s senior project scientist for Webb) said it’s possible astronauts could be sent to maintain the telescope. Webb is supposed to be parked in a Lagrange point (gravitationally stable location) in the exact opposite direction of the sun, almost a million miles away. It’s a big contrast to the Hubble Space Telescope, which was conveniently parked in low Earth orbit for astronauts to fix every so often with the space shuttle.

An Artist's Conception of the James Webb Space Telescope. Credit: ESA.

An Artist’s Conception of the James Webb Space Telescope. Credit: ESA.
While NASA works on the funding and design for larger telescope mirrors, Webb is one of the two new space telescopes it is focusing on in the search for life. Webb’s infrared eyes will be able to peer at solar systems being born, once it is launched in 2018. Complementary to that will be the Transiting Exoplanet Survey Satellite, which will fly in 2017 and examine planets that pass in front of their parent stars to find elements in their atmospheres.

The usual cautions apply when talking about this article: NASA is talking about several missions under development, and it is unclear yet what the success of SLS or any of these will be until they are battle-tested in space.

But what this discussion does show is the agency is trying to find many purposes for its next-generation rocket, and working to align it to astrophysics goals as well as its desire to send humans further out in the solar system.

Tagged as:
James Webb Space Telescope,
jwst,
life beyond earth,
SLS,
space launch system,
TESS,
transiting exoplanet survey satellite