Friday, April 30, 2010

Astronomy Picture of the Day

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Discover the cosmos! Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer.

2010 April 30
See Explanation.  Clicking on the picture will download  the highest resolution version available.

Mars in a Manger
Image Credit & Copyright: John Ambrose

Explanation: At opposition in late January, Mars shone very brightly in planet Earth's night sky, among the stars of the constellation Cancer the Crab. Since then the Red Planet has been fading, but still lingers in Cancer during April and May. In mid-April, Mars wandered remarkably close to Cancer's famous star cluster M44, the Beehive Cluster. M44 is also known by an older name, Praesepe, Latin for cradle or manger. Captured in this 60 second time exposure made on April 14, a yellow-tinged Mars and M44 are near the center of the field, seemingly just beyond the reach of a pine tree. Of course, M44's stars are about 600 light-years away, while Mars was more like 600 light-seconds from Earth. The digital photograph was made with a camera mounted on a telescope tracking the stars through dark skies above a camp ground in Virginia, USA. During the exposure, passing car lights briefly illuminated the tree branches.

Comms Module For Second MUOS Sat Delivered

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File image.
by Staff Writers
Sunnyvale CA (SPX) Apr 30, 2010
Lockheed Martin has delivered a cutting-edge communications system module for the second satellite in the U.S. Navy's Mobile User Objective System (MUOS) program.

Supporting ultra-high frequency (UHF) satellite communications (SATCOM), MUOS will provide assured communications, including simultaneous voice, video and data, for mobile warfighters.

Designed and built by Lockheed Martin in Newtown, Pa., and delivered to the company's facilities in Sunnyvale, Calif., the module features a wideband code division multiple access payload that incorporates advanced technology to provide a 10-fold increase over legacy UHF SATCOM in the number and capacity of satellite links.

These technologies will support new mobile satellite terminals that are under development for the Joint Tactical Radio System.

The module also includes a legacy UHF payload provided by Boeing Defense, Space and Security, El Segundo, Calif., that is compatible with more than 10,000 deployed UHF SATCOM terminals that will transition to MUOS as existing UHF Follow-on (UFO) satellites reach the end of their on-orbit life.

"Delivery of this high-performance system module reflects the entire team's commitment to successful program execution with a focus on quality and timeliness," said Mark Pasquale, Lockheed Martin's MUOS vice president.

"We look forward to successfully executing the critical integration and test work ahead and achieving mission success for our Navy customer."

Over the next few months, Lockheed Martin will complete the final test verification phase on the system module, integrate it with the spacecraft propulsion core module and other space vehicle components, and begin environmental and acceptance testing of the fully integrated space vehicle.

The first MUOS satellite has completed Passive Intermodulation testing and is currently undergoing electromagnetic interference/electromagnetic compatibility testing in support of the Spacecraft Level Baseline Integrated System Test (BIST).

BIST testing will characterize the overall performance of the fully integrated MUOS spacecraft and establish a performance baseline prior to entering the environmental test phase, which includes acoustic and thermal vacuum testing.

www.spacedaily.com

Thursday, April 29, 2010

Astronomy Picture of the Day

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Discover the cosmos! Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer.

2010 April 29
See Explanation.  Clicking on the picture will download  the highest resolution version available.

Virgo Cluster Galaxy NGC 4731
Image Credit & Copyright: Stephen Leshin

Explanation: Barred spiral galaxy NGC 4731 lies some 65 million light-years away. The lovely island universe resides in the large Virgo cluster of galaxies. Colors in this well-composed, cosmic portrait, highlight plentiful, young, bluish star clusters along the galaxy's sweeping spiral arms. Its broad arms are distorted by gravitational interaction with a fellow Virgo cluster member, giant elliptical galaxy NGC 4697. NGC 4697 is beyond this frame above and to the left, but a smaller irregular galaxy NGC 4731A can be seen near the bottom in impressive detail with its own young blue star clusters. Of course, the individual, colorful, spiky stars in the scene are much closer, within our own Milky Way galaxy. NGC 4731 itself is well over 100,000 light-years across.

Wednesday, April 28, 2010

Cassini Measures Tug Of Enceladus

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Artist's concept of Cassini's flyby of Saturn's moon Enceladus. Image credit: NASA/JPL
by Staff Writers
Pasadena CA (JPL) Apr 27, 2010
NASA's Cassini spacecraft will be gliding low over Saturn's moon Enceladus for a gravity experiment designed to probe the moon's interior composition.

The flyby, which will take Cassini through the water-rich plume flaring out from Enceladus's south polar region, will occur on April 27 Pacific time and April 28 UTC. At closest approach, Cassini will be flying about 100 kilometers (60 miles) above the moon's surface.

Cassini's scientists plan to use the radio science instrument to measure the gravitational pull of Enceladus against the steady radio link to NASA's Deep Space Network on Earth.

Detecting any wiggle will help scientists understand what is under the famous "tiger stripe" fractures that spew water vapor and organic particles from the south polar region. Is it an ocean, a pond or a great salt lake?

The experiment will also help scientists find out if the sub-surface south polar region resembles a lava lamp.

Scientists have hypothesized that a bubble of warmer ice periodically moves up to the crust and repaves it, explaining the quirky heat behavior and intriguing surface features.

Tuesday, April 27, 2010

Astronomy Picture of the Day

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Discover the cosmos! Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer.

2010 April 27
See Explanation.  Clicking on the picture will download  the highest resolution version available.

The Bloop: A Mysterious Sound from the Deep Ocean
Credit: NOAA, SOSUS

Explanation: What created this strange sound in Earth's Pacific Ocean? Pictured above is a visual representation of a loud and unusual sound, dubbed a Bloop, captured by deep sea microphones in 1997. In the above graph, time is shown on the horizontal axis, deep pitch is shown on the vertical axis, and brightness designates loudness. Although Bloops are some of the loudest sounds of any type ever recorded in Earth's oceans, their origin remains unknown. The Bloop sound was placed as occurring several times off the southern coast of South America and was audible 5,000 kilometers away. Although the sound has similarities to those vocalized by living organisms, not even a blue whale is large enough to croon this loud. The sounds point to the intriguing hypothesis that even larger life forms lurk in the unexplored darkness of Earth's deep oceans. A less imagination-inspiring possibility, however, is that the sounds resulted from some sort of iceberg calving. No further Bloops have been heard since 1997, although other loud and unexplained sounds have been recorded.

ESA’s Envisat monitors oil spill

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Envisat radar image of the oil spill
Envisat radar image of the oil spill

27 April 2010
These ESA Envisat images capture the oil that is spilling into the Gulf of Mexico after a drilling rig exploded and sank off the coasts of Louisiana and Mississippi, USA, on 22 April.

In the black-and-white radar image the oil spill is visible as a dark grey whirl in the bottom right, while in the optical image it is seen as a white whirl. The Mississippi Delta is at top left, and the Delta National Wildlife Refuge extends out into the Gulf.

Officials report that about 1000 barrels of oil a day is escaping from a damaged oil well located 1.5 km under the drilling rig. By yesterday afternoon, the spill was covering an area some 77 km long and 63 km wide.

Envisat optical image

Envisat optical image
The US Coast Guard, the National Oceanic and Atmospheric Administration, the London-based BP and oil industry experts are attempting to stem the leak and prevent it reaching the Gulf Coast and the fragile ecosystem there.

In order to observe the clean-up efforts, the US Geological Survey, on behalf of the US Coast Guard, requested satellite maps of the area from the International Charter Space and Major Disasters. The Charter is an international collaboration, initiated by ESA and the French space agency, CNES, to put satellite remote sensing at the service of civil protection agencies and others in response to natural and man-made disasters.

Envisat acquired these images from its Advanced Synthetic Aperture Radar (black and white) and Medium Resolution Imaging Spectrometer on 26 April at 15:58 UTC and on 25 April at 16:28 UTC, respectively.

www.esa.int

Monday, April 26, 2010

Poor Pluto: Number Of Dwarf Planets Increases

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In space, objects tend to conform to one of five shapes: (clockwise from left) spheres, dust, potatoes, halos and disks. Image: Lineweaver, Norman and Chopra
by Staff Writers
Canberra, Australia (SPX) Apr 26, 2010
New research from the Australian National University has further reduced the status of Pluto by suggesting there are many more dwarf planets in the Solar System than previously thought.

ANU astronomers have just published results that would reclassify what it is to be a dwarf planet, increasing the number of Pluto's fellow travellers by a factor of ten.

The International Astronomical Union classifies objects in the Solar System into three groups: planets, dwarf planets, and small solar system bodies. In 2006, Pluto was demoted from planet to dwarf planet, leaving eight planets, five dwarf planets and thousands of small solar system bodies orbiting the Sun.

Dr Charley Lineweaver and Dr Marc Norman from the ANU Planetary Science Institute looked at how spherical the icy moons in our solar system are, and recalculated the size of objects at the boundary between dwarf planets and small solar system bodies. Previous estimates have classified icy objects with radii larger than 400 km as dwarf planets.

The new research suggests that this radius should be closer to 200 km, which would increase the number of objects classified as dwarf planets to roughly 50.

The boundary between dwarf planets and small solar system bodies is based on whether the object is round or not.

"Small solar system objects are irregularly shaped, like potatoes," Dr Lineweaver said. "If an object is large enough that its self-gravity has made it round, then it should be classified as a dwarf planet. We calculated how big rocky objects (like asteroids) have to be, and how big icy objects (like the moons of the outer planets and objects further out than Neptune) have to be, for their self-gravity to make them round. For icy objects we found a 'potato radius' of roughly 200km - about half as large as the roughly 400km radius now used to classify dwarf planets.

"The boundary between dwarf planets and small solar system bodies is somewhat arbitrary, but is based on the concept of hydrostatic equilibrium, or how round an object is. Whether the self-gravity of an object is strong enough to make the object round depends on the strength of its material. That is why strong rocky objects need to have a radius of roughly 300km before they turn from lumpy, potato-shaped bodies into spheres, while weaker icy objects can be spheres with a radius of only roughly 200km."

Lineweaver and Norman's paper "The Potato Radius: a Lower Minimum Size for Dwarf Planets" will be published in the Proceedings of the 9th Australian Space Science

Conference, eds W. Short and I. Cairns, and is available at www.mso.anu.edu.au/~charley/publications.html

Studying dwarf planets and objects in the Kuiper Belt can help astrobiologists get a better picture of how our solar system formed and how it was able to support habitable worlds like Earth. Some scientists also believe that impactors that have struck Earth in the past, such as comets, could have originated from this mysterious region of the solar system. Studying Kuiper Belt objects can help astrobiologists understand the likelyhood of such objects entering into collision-course orbits with Earth in the future.

Friday, April 23, 2010

Starry-eyed Hubble celebrates 20 years of awe and discovery

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Hubble captures view of ‘Mystic Mountain’


23 April 2010
The most prolific space observatory will zoom past its 20-year milestone this weekend. On 24 April 1990, the Space Shuttle and its crew released the NASA/ESA Hubble Space Telescope into Earth orbit. What followed is one of the most remarkable sagas of the space age.

Hubble’s unprecedented capabilities have made it one of the most powerful science instruments ever conceived, and certainly the one most embraced by the public. Hubble’s discoveries have revolutionised nearly all areas of astronomy, from planetary science to cosmology. And its pictures are unmistakably out of this world.


Comparison views of ‘Mystic Mountain’

At times, Hubble’s starry odyssey has played out like a space soap opera: with broken equipment, a bleary-eyed primary mirror and even a Space Shuttle rescue/repair mission cancellation. But the ingenuity and dedication of Hubble scientists, engineers and NASA and ESA astronauts have allowed the observatory to rebound time and time again. Its crisp vision continues to challenge scientists with exciting new surprises and to enthral the public with ever-more evocative colour images.


Wide View of ‘Mystic Mountain’

NASA, ESA and the Space Telescope Science Institute (STScI) are celebrating Hubble’s journey of exploration with a stunning new picture. Another exciting part of the anniversary will be the launch of the revamped European website for Hubble, spacetelescope.org. ESA will also be sponsoring the Hubble Pop Culture Contest that calls for fans to search for examples of the observatory’s presence in everyday life.



Details in a cosmic pinnacle

The brand new Hubble anniversary image highlights a small portion of one of the largest observable regions of starbirth in the galaxy, the Carina Nebula. Towers of cool hydrogen laced with dust rise from the wall of the nebula. The scene is reminiscent of Hubble’s classic Pillars of Creation photo from 1995, but even more striking in appearance.


Hubble captures spectacular ‘landscape’ in the Carina Nebula

The image captures the top of a pillar of gas and dust, three light-years tall, which is being eaten away by the brilliant light from nearby bright stars. The pillar is also being pushed apart from within, as infant stars buried inside it fire off jets of gas that can be seen streaming from towering peaks like arrows sailing through the air.



Hubble’s wide view of ‘Mystic Mountain’ in the infrared

Hubble fans worldwide are being invited to share the ways in which the telescope has affected them. They can send an email, post a Facebook message or use the Twitter hashtag #hst20. Or, they can visit the Messages to Hubble page on hubblesite.org, type in their entry and read selections from other messages that have been received.

Fan messages will be stored in the Hubble data archive along with the telescope’s many terabytes of science data. Future researchers will be able to read these messages and understand how Hubble had such an impact on the world.


To date, Hubble has looked at over 30 000 celestial targets and amassed over half a million pictures in its archive. The last heroic servicing mission by astronauts to Hubble in May 2009 made the telescope 100 times more powerful than when it was launched.

In addition to its irreplaceable scientific importance, Hubble brings cosmic wonders into millions of homes and schools every day. For the past 20 years the public have become co-explorers with this wondrous observatory.

www.esa.int

Thursday, April 22, 2010

Astronomy Picture of the Day

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Discover the cosmos! Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer.

2010 April 22
See Explanation.  Clicking on the picture will download  the highest resolution version available.

Venus, Mercury, and Moon
Credit & Copyright: Pete Lawrence (Digital-Astronomy)

Explanation: Earlier this month, Venus and Mercury climbed into the western twilight, entertaining skygazers around planet Earth in a lovely conjunction of evening stars. Combining 8 images spanning April 4 through April 15, this composite tracks their progress through skies above Portsmouth, UK. Each individual image was captured at 19:50 UT. The sequential path for both bright planets begins low and to the left. But while Venus continues to swing away from the setting Sun, moving higher above the western horizon, Mercury first rises then falls. Its highest point is from the image taken on April 11. Of course on April 15, Venus and Mercury were joined by a young crescent Moon.

40th Anniversary of Earth Day April 22, 2010

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Forty years after the first Earth Day, the world is in greater peril than ever. While climate change is the greatest challenge of our time, it also presents the greatest opportunity – an unprecedented opportunity to build a healthy, prosperous, clean energy economy now and for the future.

Earth Day 2010 can be a turning point to advance climate policy, energy efficiency, renewable energy and green jobs. Earth Day Network is galvanizing millions who make personal commitments to sustainability. Earth Day 2010 is a pivotal opportunity for individuals, corporations and governments to join together and create a global green economy. Join the more than one billion people in 190 countries that are taking action for Earth Day.

Wednesday, April 21, 2010

Astronomy Picture of the Day

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Discover the cosmos! Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer.

2010 April 21
See Explanation.  Clicking on the picture will download  the highest resolution version available.

Wide Angle: The Cat's Paw Nebula
Credit: ESO, DSS2

Explanation: Nebulae are perhaps as famous for being identified with familiar shapes as perhaps cats are for getting into trouble. Still, no known cat could have created the vast Cat's Paw Nebula visible in Scorpius. At 5,500 light years distant, Cat's Paw is an emission nebula with a red color that originates from an abundance of ionized hydrogen atoms. Alternatively known as the Bear Claw Nebula or NGC 6334, stars nearly ten times the mass of our Sun have been born there in only the past few million years. Pictured above, a wide angle, deep field image of the Cat's Paw nebula was culled from the second Digitized Sky Survey.


www.nasa.gov

India To Return To Russian Boosters After Failed Rocket Launch

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Photo courtesy AFP.
by Staff Writers
New Delhi, India (SPX) Apr 21, 2010
India will temporarily go back to using Russian-produced space equipment after its indigenous GSLV rocket failed, a spokesman for Indian Space Research Organization (ISRO) said on Friday.

The Geosynchronous Satellite Launch Vehicle, GSLV D3, fell into the Bay of Bengal 304 seconds after liftoff as its cryogenic engine failed to perform. The rocket tumbled, lost altitude and finally splashed down in the sea.

'Five launches are scheduled for the 2010-2011 fiscal year [which began April 1], including two GSLV and three PSLV launches. The next two GSLV will be launched with Russian cryogenic engines," ISRO spokesman S. Satish said.

India earlier bought seven Russian-made 12KRB oxygen-hydrogen booster sections, five of which have already been used for launches.

India is seeking to become the sixth country to develop its own cryogenic booster sections, necessary for lifting heavy satellites to geostationary orbit. Until recently, only the United States, Russia, France, Japan and China had the technology.

The head of the Indian Space Research Organization (ISRO), K. Radhakrishnan, said the next rocket launch with a domestically produced cryogenic engine will be held this year.

ISRO recently announced that from now on it will orbit 10 satellites every fiscal year.

The crashed GSLV, 50 meters long and weighing 416 tons, was meant to orbit G-Sat, a sophisticated 2.2-ton communications satellite.

The cost of the failed launch is estimated at $75 million, including $40 million for the rocket's construction.

www.spacedaily.com

Monday, April 19, 2010

Astronomy Picture of the Day

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Discover the cosmos! Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer.

2010 April 19
See Explanation.  Clicking on the picture will download  the highest resolution version available.

Ash and Lightning Above an Icelandic Volcano
Credit & Copyright: Marco Fulle (Stromboli Online)

Explanation: Why did the recent volcanic eruption in Iceland create so much ash? Although the large ash plume was not unparalleled in its abundance, its location was particularly noticeable because it drifted across such well populated areas. The Eyjafjallajökull volcano in southern Iceland began erupting on March 20, with a second eruption starting under the center of small glacier on April 14. Neither eruption was unusually powerful. The second eruption, however, melted a large amount of glacial ice which then cooled and fragmented lava into gritty glass particles that were carried up with the rising volcanic plume. Pictured above two days ago, lightning bolts illuminate ash pouring out of the Eyjafjallajökull volcano.

Friday, April 16, 2010

JPL Instrument Sees Disruptive Iceland Volcanic Cloud

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Infrared AIRS image of Iceland volanic ash plume Infrared AIRS image of Iceland volanic ash plume, shown in blue. Image credit: NASA/JPL › Full image and caption


April 15, 2010

For the second time this month, Iceland's Eyjafjallajokull volcano (pronounced "Aya-fyatla-jo-kutl") erupted. The latest eruption, on Wed., April 14, spewed a cloud of ash into the atmosphere and is disrupting air travel in Northern Europe and around the world.

The Atmospheric Infrared Sounder (AIRS) instrument on NASA's Aqua satellite flew over the volcano at 1:30 p.m. local time (13:29:24 UTC, or 6:29:24 a.m. PDT) on April 15, capturing this false-color infrared image, as well as a visible image of the ash plume. The images show the ash cloud (in blue) enveloping Iceland and moving eastward over the Shetland Islands and onward to Europe. The ash clouds appear to be at an altitude of 3,658 meters (12,000 feet).

NASA works with other agencies on using satellite observations to aid in the detection and monitoring of aviation hazards caused by volcanic ash. More information on this NASA program is at: http://science.larc.nasa.gov/asap/research-ash.html . The ingestion of ash particles from such clouds can result in engine failure for aircraft.

Because infrared radiation does not penetrate through clouds, AIRS infrared images show either the temperature of the cloud tops or the surface of Earth in cloud-free regions. The lowest temperatures (in purple) are associated with high, cold cloud tops. In cloud-free areas the AIRS instrument will receive the infrared radiation from the surface of the Earth, resulting in the warmest temperatures (orange/red).


www.jpl.nasa.gov

Thursday, April 15, 2010

ESA: Celebrating the ISS and preparing for the future

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ISS   photographed by an STS-130 crew member
The International Space Station today


Celebrating the ISS and preparing for the future

14 April 2010
Now that the International Space Station is fully operational, the programme partners will gather in Berlin on 19–21 April to discuss the successes and potential of this unique international cooperation.

The International Space Station (ISS) is now almost complete and capable of housing a crew of six astronauts. At times, more than 12 people can work aboard.

One of the most ambitious international projects ever and the largest spacecraft to orbit our planet is ready for at least 10 more years of productive operations.

The Station’s success stories will be presented during a three-day symposium at the Hotel Adlon Kempinski in Berlin beginning 19 April. International speakers will discuss their achievements, the lessons learnt and current projects. The gathering has been convened by ESA Director of Human Spaceflight, Simonetta Di Pippo, on behalf of the ISS international partners.

The speakers of the symposium will include several astronauts, high-level representatives of the participating space agencies and major players from the industry. The keynote speaker on the first day is Nobel Prize laureate Prof. Samuel Ting. Prof Ting is leader of the Alpha Magnetic Spectrometer (AMS), a cosmology experiment for capturing the cosmic ray particles for better understanding of the origins of the Universe and the biggest scientific experiment designed for the ISS. Professor Ting will speak about a subject close to his research: the value of the ISS for science.

The first expedition crew, William Shepherd, Yuri Gidzenko and Sergei Krikalev, who opened a new era in international cooperation by moving into the Station 10 years ago, will also reunite, for the first time, during the symposium.

ISS  Symposium  logo


'ISS for you: citizens first'

The slogan of the symposium reflects the importance of the International Space Station to humankind in general. It is this century’s first concrete example of peaceful cooperation, uniting 14 nations.

Benefiting from uninterrupted weightlessness and a privileged vantage point on Earth, the Universe and the space environment, its research facilities cover a wide range of fundamental and applied fields, affecting our daily lives on Earth. It is also a unique testbed to prepare advanced concepts for future exploration missions.

ISS is a classroom in space, inspiring new generations. From it, we can see the fragility of our home planet and the vastness of the Universe. It is at the final frontier, inviting us to explore, learn and use.

As the symposium will show, the Station is benefiting us all.


Further information and a detailed programme are available at: www.iss2010symposium.com

www.esa.int

Wednesday, April 14, 2010

Obama to outline US space plans in NASA visit

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Apollo hero Armstrong condemns Obama space plan
Washington, April 13, 2010 (AFP) - Apollo 11 hero Neil Armstrong Tuesday lashed out at President Barack Obama's decision to axe NASA plans to return to the Moon, describing the move as "devastating" to the US space program. Armstrong, the first human to set foot on the lunar surface, was one of three former astronauts who signed an open letter to Obama ahead of his visit to Florida on Thursday where he will deliver a space policy speech. Budget plans unveiled two months ago proposed scrapping the Constellation program, which was developing a new rocket to take Americans back to the moon; and giving private industry the role of building the space vehicles to take humans to the International Space Station (ISS).

However Armstrong and fellow Apollo program commanders James Lovell and Eugene Cernan bemoaned the proposals for the US space effort in a letter released to NBC News on Tuesday. Armstrong, Lovell and Cernan said that while some of Obama's NASA budget proposals had "merit," the decision to cancel the Constellation program, the Ares 1 and Ares V rockets and the Orion spacecraft, was "devastating." American astronauts could now only reach low Earth orbit and the ISS by hitching a ride on Russia's Soyuz spacecraft "at a price of over 50 million dollars per seat," the letter said.

"For The United States, the leading space faring nation for nearly half a century, to be without carriage to low Earth orbit and with no human exploration capability to go beyond Earth orbit for an indeterminate time into the future, destines our nation to become one of second or even third rate stature," the astronauts said. "Without the skill and experience that actual spacecraft operation provides, the USA is far too likely to be on a long downhill slide to mediocrity," they added in the letter.
by Staff Writers
Washington (AFP) April 14, 2010
President Barack Obama visits Kennedy Space Center in Florida on Thursday to deliver a "major space policy speech" outlining the new future for US space exploration, NASA officials say.

But Florida lawmakers, NASA employees and others who make a living from the US space program are hoping the president will offer details on the "bold and ambitious new space initiative" which the White House proposed in February.

Plans unveiled two months ago proposed scrapping the Constellation program, which was developing a new rocket to take Americans back to the moon; and giving private industry the role of building the space vehicles to take humans to the International Space Station (ISS).

NASA, meanwhile, would concentrate on research and development.

The proposals caught many space officials and aficionados, as well as Florida lawmakers, off guard, and they are hoping Obama will ease fears about everything from job cuts to loss of US prestige.

Former NASA administrator Michael Griffin called the new path a "total surprise," while lawmakers from both sides of the aisle have vowed to work together to change the White House proposals, which Democratic Representative Susan Kosmas described as "unacceptable."

The proposed changes would result in huge job losses for a state already battered by the slack economy, she said.

Some 9,000 highly skilled professionals would lose their jobs on the Space Coast, the nickname given to Florida's Atlantic shoreline and home to the Kennedy Space Center, a region already reeling from double-digit unemployment, said Kosmas.

Additionally, three local support jobs would be lost for each skilled job cut at the space center, said Melissa Stains, president of the Chamber of Commerce of Cocoa Beach, which lies just south of the Kennedy Space Center and sees an influx of tourists and space industry workers for each shuttle launch.

"Three times 9,000 is 27,000 jobs in our area... it's huge," said Stains.

"We are in a recession, we have high unemployment... and now we might lose the biggest employer in the county," she said.

The change of direction for NASA would coincide with already announced plans to retire the space shuttle. That decision was made by former president George W. Bush in 2004.

After the shuttle fleet is grounded, the United States would have to depend on Russia's Soyuz spacecraft to ferry astronauts to the International Space Station, the construction of which has been almost exclusively funded by the United States.

Constellation was to have taken over where the shuttle left off, but only after a gap of at least five years.

But with financial reasons forcing Obama to propose that the hugely expensive and over-budget rocket project be scrapped, the United States could be a space hitchhiker for several years, until private industry can build a new launch vehicle and fill the gap.

"We are very concerned about losing our leadership in space," said Kosmas, who with Republican congressman Bill Posey has introduced a bill in Congress that would extend the space shuttle's life and speed up development of a new US spacecraft.

She is hoping Obama will announce plans to continue with manned space flight and suggests keeping the shuttle operational.

"Since the shuttle is the only US space vehicle currently with the capability of servicing and supporting the ISS, we should continue to use that capability," she said.

Dale Ketcham, president of the private think tank Spaceport Research and Technology Institute, was also concerned that the United States would lose its leading role in space exploration and called on Obama to chart a clear path in space for the United States.

"I think people fear Obama is abandoning US leadership in space... I believe he does want to go to the moon, to Mars, but he has to come down here and say that.

"We need to know where we are going," Ketcham said.

Tuesday, April 13, 2010

Cassini Finishes Saturnian Doubleheader

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Pasadena CA (JPL) Apr 13, 2010 NASA's Cassini spacecraft completed its double flyby this week, swinging by Saturn's moons Titan and Dione with no maneuver in between. The spacecraft has beamed back stunning raw images of fractured terrain and craters big and small on Dione, a moon that had only been visited once before by Cassini.

The Titan flyby took place April 5, and the Dione flyby took place April 7 in the UTC time zone, and April 6 Pacific time. During the Titan flyby, an unexpected autonomous reset occurred and Cassini obtained fewer images of Titan than expected. But the cameras were reset before reaching Dione, which was the primary target on this double flyby.

Scientists are poring over data from Dione to discern whether the moon could be a source of charged particles to the environment around Saturn and material to one of its rings. They are also trying to understand the history of dark material found on Dione.

A fortuitous alignment of these moons allowed Cassini to attempt this doubleheader. Cassini had made three previous double flybys and another two are planned in the years ahead. The mission is nearing the end of its first extension, known as the Equinox Mission. It will begin its second mission extension, known as the Solstice Mission, in October 2010.

The Cassini-Huygens mission is a cooperative project of NASA, the European Space Agency and the Italian Space Agency. The Jet Propulsion Laboratory, a division of the California Institute of Technology in Pasadena, manages the Cassini-Huygens mission for NASA's Science Mission Directorate in Washington. The Cassini orbiter was designed, developed and assembled at JPL.

More information about the Titan flyby, dubbed "T67," is available here.

More information about the Dione flyby, dubbed "D2," is available here.

www.spacedaily.com

Monday, April 12, 2010

DARPA seeks to develop optics for space-based video surveillance system

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ARLINGTON, Va.—Astronomers at the U.S. Defense Advanced Research Projects Agency (DARPA) in Arlington, Va., plan to develop a large, diffractive optics membrane and communications equipment for a geosynchronous orbit-based telescope, which is to be part of a space-based video surveillance system.

The program is called Membrane Optic Imager Real-time Exploitation (MOIRE), for which DARPA officials say they will issue a broad agency announcement (BAA) soon.

The MOIRE program seeks to provide persistent, real-time, tactical video to the warfighter. Developing diffractive membrane optics could help pave the way to low-cost geosynchronous imaging, DARPA scientists believe.

Ultimately, DARPA wants to develop a 20-meter system providing 24/7 visible National Imagery Interpretability Rating Scale (NIIRS) 3.5+ coverage over denied areas with at least a 1 Hz rate, a field of view larger than 60 square miles, with a cost less than $500 million each. Phase-3 of the MOIRE program will develop a 10-meter diffractive membrane.

The future MOIRE program BAA will seek industry proposals that address large, inexpensive, lightweight, deployable, diffractive membrane optics for geosynchronous orbit imaging systems; near-real-time image stabilization and tactical geolocation knowledge; a telescope design that increases spectral bandwidth; stability and dynamics of the large structure in geosynchronous orbit; and target motion detection capability for highway speeds.

More information is online at https://www.fbo.gov/spg/ODA/DARPA/CMO/DARPA-SN-10-31/listing.html.

mae.pennnet.com

Friday, April 9, 2010

Is densest Kuiper belt object a wayward asteroid?

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A giant rock is walking among the "dirty iceballs" in the outer solar system, a new study suggests. Researchers say it may have journeyed there from the asteroid belt near Mars, or it may have been the victim of a cosmic crash that blasted away its once-icy exterior.

Quaoar was discovered in 2002 in the Kuiper belt, a ring of icy bodies beyond Neptune. At about 900 kilometres across, or 40 per cent as wide as Pluto, it is not the biggest denizen of the belt, but researchers now say it may be the densest.

Wesley Fraser and Michael Brown of Caltech confirmed its size by studying archival images from the Hubble Space Telescope. They also used Hubble images to study the motion of its moon, Weywot, which allowed them to calculate Quaoar's mass.

Combining the size and mass revealed Quaoar's density to be between 2.9 and 5.5 grams per cubic centimetre. That is much higher than that of other Kuiper belt residents like Pluto, which has a density of about 2.0 grams per cubic centimetre.

Quaoar's high density suggests it is made almost entirely of rock, unlike its neighbours, which are a mixture of ice and rock, the researchers conclude. They say the rocky world may be a refugee from the asteroid belt between Mars and Jupiter, thrown outwards early in the solar system's history, when the orbits of the giant planets are thought to have shifted.

Source:www.newscientist.com

CryoSat-2 polar mission launched

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ESA PR 07-2010. Europe's first mission dedicated to studying the Earth’s ice was launched today from Kazakhstan. From its polar orbit, CryoSat-2 will send back data leading to new insights into how ice is responding to climate change and the role it plays in our 'Earth system'.

The CryoSat-2 satellite was launched at 15:57 CEST (13:57 UTC) on a Dnepr rocket provided by the International Space Company Kosmotras from the Baikonur Cosmodrome in Kazakhstan. The signal confirming that it had separated from the launcher came 17 minutes later from the Malindi ground station in Kenya.
CryoSat-2 replaces the original CryoSat satellite that was lost in 2005 owing to a launch failure. The mission objectives, however, remain the same: to measure changes in the thickness of the vast ice sheets that overlie Antarctica and Greenland, as well as variations in the thickness of the relatively thin ice floating in the polar oceans.

"We know from our radar satellites that sea ice extent is diminishing, but there is still an urgent need to understand how the volume of ice is changing," said Volker Liebig, ESA’s Director of Earth Observation Programmes. "To make these calculations, scientists also need information on ice thickness, which is exactly what our new CryoSat satellite will provide. We are now very much looking forward to receiving the first data from the mission."

The launch of CryoSat-2 marks a significant achievement for ESA's Earth observation programme and brings to three the number of its Earth Explorer satellites placed in orbit, all having been launched within a little over 12 months. CryoSat-2 follows on from the Gravity field and steady-state Ocean Circulation Explorer (GOCE) mission, launched in March 2009, and the Soil Moisture and Ocean Salinity (SMOS) mission, launched last November.

Earth Explorers are launched in direct response to issues identified by the scientific community and aim to improve our understanding of how the Earth system works and the effect that human activity is having on natural processes.

Source: http://www.esa.int/esaCP/SEMH5ZZNK7G_index_0.html