Archive for October 30, 2013

England’s Atlantis: Images of a Lost Medieval Town

Posted in SCIENCE, GEOLOGY,HEALTH, INVIRONMENT, TECHNOLOGY,ANTHROPOLOGY, ARCHAEOLOGY, with tags on October 30, 2013 by 2eyeswatching

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England’s Atlantis: Images of a Lost Medieval Town

Stephanie Pappas, LiveScience Senior Writer

St. Peters Church

Credit: University of Southampton
This three-dimensional reconstruction shows the ruins of St. Peters Church in the sunken city of Dunwich.

Saint Nicholas Church

Credit: University of Southampton
The abandoned ruins of medieval Dunwich’s Saint Nicholas Church likely slid into the ocean around the year 1700.

Saint Katherine’s Chapel

Credit: University of Southampton
These ruins may belong to medieval Dunwich’s Saint Katherine’s Chapel, which likely fell into the sea between 1550 and 1650 after the city was abandoned.

Saint Katherine’s Mortar

Credit: University of Southampton
Mortar blocks from what may be the medieval chapel of Saint Katherine in Dunwich, seen resting on the seabed.

Dunwich Map

Credit: University of Southampton
University of Southampton researchers have built the most detailed map of the sunken city of Dunwich ever.

Map of Dunwich

Credit: University of Southampton
The medieval port city of Dunwich was partially flooded and swept to sea beginning in the 1200s. This map shows where the ruins sit now, in relatively shallow water off the Suffolk coast.

Eroding Dunwich

Credit: J. C. Docwra Collection and the EA Shoreline Management Group.
As coastal erosion ate away at Dunwich, the town was gradually abandoned. The ruins of the medieval town’s All Saints Church eventually fell into the sea as the cliffs nearby crumbled.

The Real Atlantis?

Atlantis is a legendary “lost” island subcontinent often idealized as an advanced, utopian society holding wisdom that could bring world peace. The idea of Atlantis has captivated dreamers, occultists, and New Agers for generations. Here, a 1669 map by Athanasius Kircher places Atlantis in the middle of the Atlantic Ocean. The map is oriented with south at the top.

‘Lost’ City of Atlantis: Fact & Fable

Benjamin Radford, LiveScience Contributor

Atlantis is a legendary “lost” island subcontinent often idealized as an advanced, utopian society holding wisdom that could bring world peace. The idea of Atlantis has captivated dreamers, occultists, and New Agers for generations.

In the 1800s, mystic Madame Blavatsky claimed that she learned about Atlantis from Tibetan gurus; a century later, psychic Edgar Cayce claimed that Atlantis (which he described as an ancient, highly evolved civilization powered by crystals) would be discovered by 1969. In the 1980s, New Age mystic J.Z. Knight claimed that she learned about Atlantis from Ramtha, a 35,000-year-old warrior spirit who speaks through her. Thousands of books, magazines and websites are devoted to Atlantis, and it remains a popular topic.

Unlike many legends whose origins have been lost in the mists of time, we know exactly when and where the story of Atlantis first appeared. The story was first told in two of Plato’s dialogues, the Timaeus and theCritias, written about 330 B.C.

Though today Atlantis is often conceived of as a peaceful utopia, the Atlantis that Plato described in his fable was very different. In his bookFrauds, Myths and Mysteries: Science and Pseudoscience in Archaeology, professor of archaeology Ken Feder summarizes the story: “a technologically sophisticated but morally bankrupt evil empire — Atlantis — attempts world domination by force. The only thing standing in its way is a relatively small group of spiritually pure, morally principled, and incorruptible people — the ancient Athenians. Overcoming overwhelming odds … the Athenians are able to defeat their far more powerful adversary simply through the force of their spirit. Sound familiar? Plato’s Atlantean dialogues are essentially an ancient Greek version of Star Wars.”

Statue of Plato at Academy of Athens, Greece
Credit: Anastasios71 |shutterstock 

As propaganda, the Atlantis legend is more about the heroic Athens than a sunken civilization; if Atlantis really existed today and was found, its residents would probably try to kill and enslave us all.

It’s clear that Plato made up Atlantis as a plot device for his stories because there no other records of it anywhere else in the world. There are many extant Greek texts; surely someone else would have also mentioned, at least in passing, such a remarkable place. There is simply no evidence from any source that thelegends about Atlantis existed before Plato wrote about it.

The ‘lost’ continent

Despite its clear origin in fiction, many people over the centuries have claimed that there must be some truth behind the myths, speculating about where Atlantis would be found. Countless Atlantis “experts” have located the lost continent all around the world based on the same set of facts.  Candidates — each accompanied by their own peculiar sets of evidence and arguments — include the Atlantic Ocean, Antarctica, Bolivia, Turkey, Germany, Malta and the Caribbean.

Plato, however, is crystal clear about where Atlantis is: “For the ocean there was at that time navigable; for in front of the mouth which you Greeks call, as you say, ‘the pillars of Heracles,’ (i.e., Hercules) there lay an island which was larger than Libya and Asia together.” In other word it lies in the Atlantic Ocean beyond “the pillars of Hercules” (i.e., the Straits of Gibraltar, at the mouth of the Mediterranean). Yet it has never been found in the Atlantic, or anywhere else.

No trace of Atlantis has ever been found despite advances in oceanography and ocean floor mapping in past decades. For nearly two millennia readers could be forgiven for suspecting that the vast depths might somehow hide a sunken city or continent. Though there remains much mystery at the bottom of the world’s oceans, it is inconceivable that the world’s oceanographers, submariners, and deep-sea probes have some how missed a landmass “larger than Libya and Asia together.”

Furthermore plate tectonics demonstrate that Atlantis is impossible; as the continents have drifted, the seafloor has spread over time, not contracted. There would simply be no place for Atlantis to sink into. As Ken Feder notes, “The geology is clear; there could have been no large land surface that then sank in the area where Plato places Atlantis. Together, modern archaeology and geology provide an unambiguous verdict: There was no Atlantic continent; there was no great civilization called Atlantis.”

Myth from misinterpretation

The only way to make a mystery out of Atlantis (and to assume that it was once a real place) is to ignore its obvious origins as a moral fable and to change the details of Plato’s story, claiming that he took license with the truth, either out of error or intent to deceive. With the addition, omission, or misinterpretation of various details in Plato’s work, nearly any proposed location can be made to “fit” his description.

Yet as writer L. Sprague de Camp noted in his book Lost Continents, “You cannot change all the details of Plato’s story and still claim to have Plato’s story. That is like saying the legendary King Arthur is ‘really’ Cleopatra; all you have to do is to change Cleopatra’s sex, nationality, period, temperament, moral character, and other details, and the resemblance becomes obvious.”

The Atlantis legend has been kept alive, fueled by the public’s imagination and fascination with the idea of a hidden, long-lost utopia. Yet the “lost city of Atlantis” was never lost; it is where it always was: in Plato’s books.

Benjamin Radford is deputy editor of Skeptical Inquirer science magazine and author of six books including Scientific Paranormal Investigation: How to Solve Unexplained Mysteries. His Web site iswww.BenjaminRadford.com.

 

Image of the Day

Posted in THE UNIVERSE & SPACE SCIENCE with tags on October 30, 2013 by 2eyeswatching

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Image of the Day

by Tom Chao, SPACE.com Producer   |   September 25, 2013 12:00am ET

Mad Solar

Credit: NASA/Solar Dynamics Observatory
Monday, Oct. 28, 2013: A magnetic filament of solar material erupted on the sun in late September 2013. The 200,000 mile long (322,000 kilometers) filament tore the sun’s atmosphere, the corona, marking it with something appearing like a canyon of fire. The canyon outlines the channel where magnetic fields held the filament up before the violent outburst. The sun does not consist of fire, but actually contains plasma, a gas-like substance of charged particles that interacts with magnetic fields. This image were captured on Sept. 29-30, 2013, by NASA’s Solar Dynamics Observatory.

The Shield

Credit: ESA/M. Pedoussaut
Friday, Oct. 25, 2013: Gaia spacecraft’s Deployable Sunshield Assembly (DSA) underwent deployment testing in the S1B integration building at Europe’s spaceport in Kourou, French Guiana, on Oct. 10, 2013. The shield has two purposes: to shade Gaia’s telescopes and cameras, and to provide power. Gaia spacecraft represents ESA’s billion-star surveyor, designed to provide a precise 3D map of the Milky Way galaxy in order to understand its composition, formation and evolution. The previously scheduled launch date for Gaia has been pushed back from Nov. 20, 2013, to the next available launch window from Dec. 17 to January 5, 2014.

How Many Pixels in the Milky Way?

Credit: NASA/Ames/JPL-Caltech
Thursday, Oct. 24, 2013: A giant screen in NASA’s Ames Research Center at Moffett Field, CA, displays the center of the Milky Way galaxy (our home) as imaged by Spitzer Space Telescope. The high definition LCD science visualization screen stretches 23 feet (7 meters) in width and contains a quarter of a billion pixels. [See our Spitzer Space Telescope image gallery.]

Glow World

Credit: Auroramax
Wednesday, Oct. 23, 2013: Auroramax automated camera photographed this auroral display in Canada’s Northwest Territory on Oct. 7, 2013. For more information about auroras, see our aurora reference page and our aurora infographic.

It All Looks Fine to the Naked Eye

Credit: Babak Tafreshi
Tuesday, Oct. 22, 2013: Beneath a starry southern hemisphere sky stands one of the four Unit Telescopes of the Very Large Telescope on Cerro Paranal in the Atacama Desert of Chile. At the left side of the image, at about the level of the top of the telescope, shines Messier 31, or the Andromeda Galaxy, visible as a bright smudge. Up and to the right of Messier 31, the bright star Beta Andromedae (Mirach) glistens. Following the line created by the star and the galaxy leads to Messier 33 galaxy, almost at the top frame line. Messier 31 and Messier 33 may have interacted in the past, forming a bridge of hydrogen gas spanning the gap between them.

The Best and the Rest of Vesta

Credit: NASA/JPL-Caltech/UCAL/MPS/DLR/IDA
Monday, Oct. 21, 2013: This mosaic synthesizes some of the best views the DAWN spacecraft possessed of the giant asteroid Vesta. Right now, NASA’s DAWN spacecraft continues travelling to its next destination, dwarf planet Ceres, but the spacecraft studied Vesta from from July 2011 to September 2012. A towering mountain at the south pole, more than twice the height of Mount Everest, stands visible at the bottom of the image. The three craters known as the “snowman” lie at the top left of the asteroid. These images represent the last in Dawn’s Image of the Day series during the cruise to Dawn’s second destination, Ceres.

Fresh

Credit: NASA/Johns Hopkins University Applied Physics Laboratory/Carnegie Institution of Washington
Friday, Oct. 18, 2013: Tansen crater represents one of Mercury’s smaller named craters at just 17 miles (27 km) in diameter. The ejecta rays formed by the impact appear prominently in this color mosaic, as does the fresh crater ejecta deposit at the top of the image. MESSENGER spacecraft acquired this image as a targeted high-resolution 11-color image set. Acquiring 11-color targets began recently, in March 2013, and the campaign utilizes all of the Wide Angle Camera’s 11 narrow-band color filters. Researchers can only target features of special scientific interest for imaging in all 11 colors, owing to the large data volume involved. The crater was first seen by the Mariner 10 spacecraft in 1974, but has not been featured on MESSENGER’s gallery until now. (The image was obtained on Sept. 9, 2013, but owing to the partial government shutdown it did not appear on NASA’s website until Oct. 17, 2013.)

Galaxy

Credit: Adam Block/Mount Lemmon SkyCenter/University of Arizona
Thursday, Oct. 17, 2013: NGC 7723 is a barred spiral galaxy that lies in the constellation of Aquarius. It has an apparent magnitude of 11. Adam Block of the Mount Lemmon SkyCenter (University of Arizona) created the image in September 2013.

Howling at the Moon

Credit: Christopher Georgia
Wednesday, Oct. 16, 2013: Astrophotographer Christopher Georgia sent in a photo of a single moon dog in the sky taken on Oct. 9, 2013. He writes in an e-mail message to SPACE.com: “Have you ever witnessed a moon dog before? A moon dog or a ‘paraselene’ is a rare phenomena formed in a similar fashion to a moon halo. Bright moonlight refracting through hexagonal ice crystals in high atmospheric clouds, particularly cirrus and cirrostratus clouds, form these halos and moon dog(s). They generally form at 22 degrees around the moon. This image was pulled from a static time lapse as the moon set over a pond in Thornton, New Hampshire … “

Mighty Clouds of Joy

Credit: ESO/VPHAS+ Survey/N. Wright
Tuesday, Oct. 15, 2013: Super star cluster Westerlund 1 glows in a new picture from the VLT Survey Telescope at ESO’s Paranal Observatory. This extremely bright cluster lies about 16,000 light-years from Earth in the southern constellation of Ara (The Altar). The cluster emcompasses hundreds of very massive and brilliant stars, all very young, just a few million years old. Our view of this cluster struggles with gas and dust preventing most of the visible light from the cluster’s stars from arriving at Earth.Astronomers discovered something unexpected in this cluster. One of the stars — known as W26, a red supergiant (possibly the biggest star known) — features clouds of surrounding glowing hydrogen gas, shown as green features in the new image. These clouds represent the first ionized nebula discovered around such a star. W26 itself doesn’t possess enough heat to make the gas glow. The ionizing radiation may either come from hot blue stars in the cluster, or possibly a fainter, but hotter, companion star to W26. 

Sleep Beneath the Stars

Credit: Buddy Secor
Monday, Oct. 14, 2013: A tent glows with an inviting light under a dazzling spray of stars. Sky watcher Buddy Secor sent in a photo of the Milky Way over Bear Rocks on Dolly Sods in the Canaan State Park, WV, taken on Sept. 28, 2013. He writes to SPACE.com in an e-mail message that it was “a crystal clear night in beautiful dark sky country.”

Star Formation

Credit: Jeff Johnson
Friday, Oct. 11, 2013: Astrophotographer Jeff Johnson sent in an image of M33, the Triangulum Galaxy, which he produced with data obtained in 2012 and 2013 from his home in Las Cruces, NM. Johnson tells SPACE.com in an e-mail that he combined H-alpha (Ha) data taken recently on Sept. 23, 2013, with LRGB data collected last year to show (in red/pink) areas of hydrogen emissions, indicating exploding stars and/or areas of star formation in M33.

Try to Detect It

Credit: NASA, ESA, and G. Brammer
Thursday, Oct. 10, 2013: The center of the Milky Way (towards the constellation of Sagittarius) glows with many objects in this infrared image made by Hubble Space Telescope. This represents the best infrared image of this region ever taken with Hubble, using infrared archive data from Hubble’s Wide Field Camera 3, taken in September 2011. One thing that Hubble cannot see in this image remains hidden: the huge black hole called Sagittarius A* in the center of the galaxy. Astronomers have observed stars spinning around this supermassive black hole (located directly at the center of the image), and the black hole consuming clouds of dust with its enormous gravitational pull.

Paranal Lines

Credit: John Colosimo (colosimophotography.com)/ESO
Wednesday, Oct. 9, 2013: The night sky over Chile appears filled with star trails, the result of the Earth’s rotation during a camera’s long exposure. Beneath the light streaks lies the Paranal Residencia which houses staff and visitors to the European Southern Observatory’s Very Large Telescope, located high on Cerro Paranal in the Chilean desert. The four-story building, completed in 2002, sits with most of its structure buried underground. If the residence looks familiar, you may have seen it in the 2008 James Bond movie, “Quantum of Solace.”

Life in a Northern Town

Credit: Mia Stålnacke (via Flickr as AngryTheInch42)
Tuesday, Oct. 8, 2013: Amateur photographer Mia Stålnacke sent in a photo of an auroral display taken in Kiruna, Sweden, on Oct. 2, 2013. Kiruna lies at the highest latitude of any city in Sweden, 67.86° N., 90 miles (145 kilometers) above the Arctic Circle.

Blue Haze

Credit: ESA/Hubble & NASA; Acknowledgements: Luca Limatola, Budeanu Cosmin Mirel
Monday, Oct. 7, 2013: Planetary nebula NGC 2452 lies in the southern constellation of Puppis. After a star like our sun has depleted all its fuel, it emanates a blue haze like that shown here. The core of the star loses stability and releases energetic particles that blow the star’s atmosphere into space. At the center of the blue cloud sits what remains of the nebula’s progenitor star. A pulsating white dwarf, this cool, dim, and extremely dense star varies in brightness over time as gravity makes waves that pulse throughout the small star’s body. (Sir John Herschel created the term “planetary nebula” to describe NGC 2452 in 1847, when early telescopes did not possess enough power to establish these objects do not consist of planets.)

Blow Out

Credit: SDO/AIA
Friday, Oct. 4, 2013: An eruptive prominence grew unstable on the sun, and blew out into space over a 5-hour period on Sept. 24, 2013. The orbiting Solar Dynamics Observatory observed the event in extreme ultraviolet light.

I’m Forever Blowing Bubbles

Credit: NASA/ESA, Jeffrey Kenney (Yale University), Elizabeth Yale (Yale University)
Thursday, Oct. 3, 2013: Galaxy NGC 4438 lies in the Virgo Cluster, 50 million light-years from Earth, from where it blows huge bubbles of hot gas into space. Known as a peculiar galaxy because of its unusual shape, NGC 4438 contains at its center a supermassive black hole that consumes material swirling around it in an accretion disk, seen here as the white region below the bright bubble. Some of this material spews from the disk in opposite directions. The twin jets of matter sweep material out of their paths, slamming into a wall of dense, slow-moving gas travelling less than 223,000 mph (360,000 kph), producing the glowing material in the collision. The bubbles will continue to expand, eventually dissipating.

Locked Out

Credit: NASA
Wednesday, Oct. 2, 2013: This undated file photo shows NASA Headquarters at Two Independence Square in Washington, DC. On Oct. 1, 2013, the agency went dark as a result of the government shutdown. Visitors to the NASA.gov website received a notice stating, “Due to the lapse in federal government funding, this website is not available. We sincerely regret this inconvenience. For information about available government services, visitUSA.gov. Coincidentally, Oct. 1 also represented NASA’s 55th anniversary. [Read the full story.]

The Autumn Moon Lights My Way

Credit: Göran Strand/www.astrofotografen.se
Tuesday, Oct. 1, 2013: Astrophotographer Göran Strand sent in a photograph of the moon in Sweden seen between tree branches. He writes in an e-mail to SPACE.com: “The autumn has really started here in northern Sweden. The trees are full of colors, and the air is starting to get cold and clear. Here’s a shot … when the moon was behind a tree full of autumn colors. I think the crescent moon is at its best when visible during daylight against the blue sky.” Image taken Sept. 28, 2013.

Image of the Day Archives

Credit: NASA, ESA and Orsola De Marco (Macquarie University)
For older Image of the Day pictures, please visit the Image of the Day archives. Above: NGC 2467.

Magnificent Milky Way Glows Over Machu Picchu (Photo)

Posted in THE UNIVERSE & SPACE SCIENCE with tags on October 30, 2013 by 2eyeswatching

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Magnificent Milky Way Glows Over Machu Picchu (Photo)

by Nina Sen, SPACE.com Contributor   |   July 19, 2013 03:00pm ET
Milky Way Over Machu Picchu
Thomas O’Brien sent SPACE.com this image of the Milky Way over Machu Picchu on July 4, 2013. He captured the photo from Putucusi Mountain, which is located across the Urubamba River Valley from the historic sanctuary of Machu Picchu, Peru. Machu Picchu is the dark, saddle-shaped area between mountains on right side of the image where the arc of the Milky Way intersects with the horizon.
Credit: Thomas O’Brien | <ahref=”http: http://www.tmophoto.com=”;” “=””>www.tmophoto.com 

The glowing arc of the Milky Way points to the great ruins of the Incan Empire, Machu Picchu, in this vivid night sky image.

Thomas O’Brien took this photo in early July 2013 from the summit of Putucusi Mountain, which is located across the Urubamba River Valley from the historic sanctuary of Machu Picchu, Peru. The UNESCO World Heritage Site is the dark, saddle-shaped area between mountains on the right side of the image where the arc of the Milky Way intersects with the horizon.

The Milky Way, our own galaxy containing the solar system, is a barred spiral galaxy with roughly 400 billion stars. The stars, along with gas and dust, appear like a band of light in the sky from Earth. The galaxy stretches between 100,000 to 120,000 light-years in diameter.

Editor’s note: If you have an amazing night sky photo you’d like to share for a possible story or image gallery, please contact SPACE.com Managing Editor Tariq Malik at spacephotos@space.com.

Follow SPACE.com on Twitter @Spacedotcom. We’re also on Facebook and Google+.

 

Global Effort Needed to Defend Earth from Asteroids, Astronauts Tell UN

Posted in THE UNIVERSE & SPACE SCIENCE with tags , on October 30, 2013 by 2eyeswatching

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Global Effort Needed to Defend Earth from Asteroids, Astronauts Tell UN

by Laura Poppick, Staff Writer   |   October 25, 2013 05:51pm ET
 
An asteroid is shown crashing into Earth
An artist’s illustration of a massive asteroid impact on earth. Some single-celled organisms may be able to survive extreme impacts such as these, scientists say.
Credit: NASA/Don Davis

 

 

NEW YORK — Members of the United Nations met with distinguished astronauts and cosmonauts this week in New York to begin implementing the first-ever international contingency plan for defending Earth against catastrophic asteroid strikes.

Six of the space travelers involved in these U.N. discussions discussed the asteroid defense effort Friday (Oct. 25) in a news conference hosted by astrophysicist Neil deGrasse Tyson at the American Museum of Natural History. Their goal: to drive home the very-real threats posed by near-Earth objects (NEOs), or asteroids traveling within the radius of Earth’s orbit with the sun. You can see a video of the asteroid defense discussion here.

Scientists estimate that there are roughly 1 million near-Earth asteroids that could potentially pose a threat to the planet, but only a small fraction of these have actually been detected by telescopes. There are about 100 times more asteroids lurking in space than have ever been located, said Edward Lu, a former NASA astronaut and co-founder of the non-profit B612 Foundation advocating asteroid defense strategies. “Our challenge is to find these asteroids first, before they find us,” Lu said. [Photos: Potentially Dangerous Asteroids Up Close]

To help achieve this goal, Lu co-founded an organization called the B612 Foundation in 2002. Today, the group is developing a privately built infrared space telescope — called the Sentinel Space Telescope — with the sole purpose of locating threatening asteroids. The foundation hopes to launch the telescope by 2018.

Sentinel Space Telescope Diagram

Credit: B612 Foundation
This diagram shows the various parts of the Sentinel Space Telescope, an asteroid-monitoring observatory planned by the B612 Foundation.

The Sentinel telescope will help space agencies identify threatening near-Earth objects years before they hit Earth, providing governments and space agencies with enough time to take action, Lu and his colleagues said. Such action would entail deploying a spacecraft — or multiple spacecrafts, depending on the size of the space rock — toward the asteroid in order to smack it off course.

The technology and funds to deflect an asteroid in this way already exist, the panel explained, but the Association of Space Explorers, a group that includes active and retired astronauts, decided to involve the United Nations in their decision-making efforts to avoid nationally biased action in the event of an emergency.

Sentinel Space Telescope Asteroid View

Credit: B612 Foundation
This image depicts the region of view of the B612 Foundation’s planned Sentinel Space Telescope to monitor potentially dangerous asteroids.

“The question is, which way do you move [the asteroid]?” former NASA astronaut and B612 co-founder Russell Schweickart said in the news conference. “If something goes wrong in the middle of the deflection, you have now caused havoc in some other nation that was not at risk. And, therefore, this decision of what to do, how to do it and what systems to use have to be coordinated internationally. That’s why we took this to the United Nations.”

Potentially Hazardous Asteroids Graphic Cropped

 

 
This NASA graphic shows the orbits of all the known Potentially Hazardous Asteroids (PHAs), numbering over 1,400 as of early 2013. Shown here is a close-up of the orbits overlaid on the orbits of Earth and other inner planets.
Credit: NASA/JPL-Caltech

 

The panel hopes that the discussions with the United Nations this week —which extend from discussions dating back to 2008, when the panel presented the United Nations with the first draft of a report titled “Asteroid Threats: A Call for Global Response” —will improve public awareness of the threats at hand, and encourage policymakers to develop plans and appoint leaders to deal with threats in a timely manner.

From its vantage point near Venus’ orbit, Sentinel will have a clear view of Earth’s orbit while looking away from the glare of the sun.

 
From its vantage point near Venus’ orbit, Sentinel will have a clear view of Earth’s orbit while looking away from the glare of the sun.
Credit: Karl Tate, SPACE.com Contributor
 

The privately funded Sentinel project would launch a space telescope into a solar orbit at about the distance of the planet Venus.

Once in place, Sentinel Space Telescope would be pointed away from the sun and would start scanning the area around the orbit of Earth for undiscovered asteroidsthat might be on Earth-impacting trajectories. The current plan is to launch Sentinel in 2016 aboard SpaceX’s Falcon 9 rocket.

Sentinel Space Telescope Orbit

Credit: B612 Foundation
This illustration shows the Venus-like orbit of the Sentinel Space Telescope, a private deep-space observatory to seek out potentially dangerous asteroids. The telescope is planned by the B612 Foundation.

The spacecraft would build on technologies designed for NASA space telescopes such as Kepler and Spitzer observatories. Sentinel uses a 20-inch infrared telescope to scan for moving objects that could be asteroids in near-Earth orbits.

Sentinel would be the world’s first privately funded deep space telescope. The B612 Foundation is dedicated to protecting Earth from potentially devastating asteroid impacts. The group is named after the asteroid home of the hero of “The Little Prince,” a children’s book by Antoine de Saint-Exupéry.

Orbits of Potentially Hazardous Asteroids

Credit: NASA/JPL-Caltech
This diagram illustrates the differences between orbits of a typical near-Earth asteroid (blue) and a potentially hazardous asteroid, or PHA (orange). PHAs have the closest orbits to Earth’s orbit, coming within 5 million miles (about 8 million kilometers), and they are large enough to survive passage through Earth’s atmosphere and cause significant damage.

The explosion of a truck-size asteroid over Chelyabinsk, Russia, this past February —which blew out windows throughout the entire city and injured more than 1,000 people —helped draw public attention to what the panelists described as the often-overlooked and underappreciated threat to the planet.

NEO Survey Observatory

Credit: National Academy of Sciences
This image from a 2010 NASA report shows the position of a potential asteroid survey spacecraft that could be positioned in a Venus-trailing orbit to search for near-Earth asteroids and comets that could pose an impact risk to our home planet. The Sentinel Space Telescope appears to borrow from this mission plan.

“It did make a difference in policymakers realizing that this is not just a science-fiction concept, or something that will happen in 100 or 500 years in the future,” Thomas Jones, former NASA astronaut and senior research scientist at the Florida Institute for Human and Machine Cognition, told SPACE.com at the news conference. “The fact that it happened right now, I think, enforced the reality.”

NEO Survey Observatory Design

Credit: Ball Aerospace
The B612 Foundation’s Sentinel Space Telescope appears similar to the design initially proposed for NASA’s NEO Survey Observatory to hunt potentially dangerous asteroids.

The recommendations that the group presented to the United Nations this week provide an outline of what governments will ultimately implement in the event of an emergency. However, the details of these recommendations are still in the works, Schweickart said.

Ed Lu

Credit: B612 Foundation
Ed Lu, chairman and CEO of the B612 Foundation, is a former NASA astronaut who flew three space missions including 6 months on the International Space Station.
 

B612 Foundation Logo

Credit: B612 Foundation
B612 Foundation logo.
 

Russell Schweickart

Credit: B612 Foundation
Russell Schweickart, chair emeritus of the B612 Foundation, was the Lunar Module Pilot on the Apollo 9 mission, March 3-13, 1969.

Follow Laura Poppick on Twitter. Follow SPACE.com on TwitterFacebookand Google+. Original article on SPACE.com.

Gamma-Ray Universe: Photos by NASA’s Fermi Space Telescope

Posted in THE UNIVERSE & SPACE SCIENCE with tags on October 30, 2013 by 2eyeswatching

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Gamma-Ray Universe: Photos by NASA’s Fermi Space Telescope

by SPACE.com Staff   |   August 21, 2013 04:41pm ET

Vela Pulsar as Seen By Fermi Gamma-Ray Telescope

Credit: NASA, DOE, International Fermi LAT Collaboration
Fermi Gamma-ray Space Telescope’s extremely complex movements in space produce this delicate tracery of epicycles produced by the Vela Pulsar,

Best View Ever of Universe’s Most Extreme Energy

Credit: NASA/DOE/Fermi LAT Collaboration
This view from NASA’s Fermi Gamma-ray Space Telescope is the deepest and best-resolved portrait of the gamma-ray sky to date. The image shows how the sky appears at energies more than 150 million times greater than that of visible light. Among the signatures of bright pulsars and active galaxies is something familiar — a faint path traced by the sun.

Fermi Gamma-ray Space Telescope

Credit: NASA
Artist’s illustration of NASA’s Fermi Gamma-ray Space Telescope.

Gamma Rays in Cygnus X Star-Forming Region

Credit: NASA/DOE/Fermi LAT Collaboration/I. A. Grenier and L. Tibaldo
Gamma-ray emission detected by NASA’s Fermi space telescope fills bubbles of hot gas created by the most massive stars in a region of the constellation Cygnus known as Cygnus X. The turbulence and shock waves produced by these stars make it more difficult for high-energy cosmic rays to traverse the region. When the particles strike gas nuclei or photons of starlight, gamma rays result.

Galactic Haze Seen by Planck and Galactic ‘Bubbles’ Seen by Fermi

Credit: ESA/Planck Collaboration (microwave); NASA/DOE/Fermi LAT/D. Finkbeiner et al. (gamma rays)
This all-sky image shows the distribution of the galactic haze seen by ESA’s Planck mission at microwave frequencies superimposed over the high-energy sky, as seen by NASA’s Fermi Gamma-ray Space Telescope. Image released February 13, 2012.

W44 Supernova Remnant

Credit: NASA/DOE/Fermi LAT Collaboration, ROSAT, JPL-Caltech, and NRAO/AUI
Fermi’s LAT mapped GeV-gamma-ray emission (magenta) from the W44 supernova remnant. The features clearly align with filaments detectable in other wavelengths. This composite merges X-rays (blue) from the Germany-led ROSAT mission, infrared (red) from NASA’s Spitzer Space Telescope, and radio (orange) from the NRAO’s Very Large Array near Socorro, N.M.

Fermi Space Telescope Nearly Hit by Cosmos 1805

Credit: NASA’s Goddard Space Flight Center
NASA’s $690 million Fermi space telescope was nearly hit by the dead Russian spy satellite Cosmos 1805 on April 3, 2012. This NASA graphic depicts the orbital paths of the two spacecraft.

Radio-emitting Lobes in Centaurus A

Credit: NASA/DOE/Fermi LAT Collaboration, Capella Observatory, and Ilana Feain, Tim Cornwell, and Ron Ekers (CSIRO/ATNF), R. Morganti (ASTRON), and N. Junkes (MPIfR)
This radio, optical and gamma-ray composite illustrates the full extent of Cen A’s vast radio-emitting lobes. Radio data (orange) reveal that the structures span more than 1.4 million light-years, and Fermi’s LAT data (purple) show that they also emit gamma rays.

W44 Supernova Remnant in Parent Star

Credit: NASA/DOE/Fermi LAT Collaboration, NRAO/AUI, JPL-Caltech, ROSAT
The W44 supernova remnant is nestled within and interacting with the molecular cloud that formed its parent star. Fermi’s LAT detects GeV gamma rays (magenta) produced when the gas is bombarded by cosmic rays, primarily protons. Radio observations (yellow) from the Karl G. Jansky Very Large Array near Socorro, N.M., and infrared (red) data from NASA’s Spitzer Space Telescope reveal filamentary structures in the remnant’s shell. Blue shows X-ray emission mapped by the Germany-led ROSAT mission.

Fast-Spinning Stars Get New Image

Credit: NASA/Fermi/LAT Collaboration
ASA’s Fermi Gamma-ray Space Telescope has found 12 previously unknown pulsars (orange). Fermi also detected gamma-ray emissions from known radio pulsars (magenta, cyan) and from known or suspected gamma-ray pulsars identified by NASA’s now-defunct Compton Gamma-Ray Observatory (green).

Fast-Orbiting Pulsar in the Gamma-Ray Sky

Credit: NASA/DOE/Fermi LAT Collaboration/AEI
A map of the gamma-ray sky, created using four years of data collected by NASA’s Fermi satellite. The color coding displays the intensity of the detected gamma radiation (low intensity = blue, medium intensity = red, high intensity = yellow). The newly discovered radio pulsar PSR J1311-3430, a strong gamma-ray source, is marked by a green circle.

Space-Time Observations Find Einstein Still Rules

Credit: NASA/DOE/Fermi LAT Collaboration
This view of the gamma-ray sky constructed from one year of Fermi LAT observations is the best view of the extreme universe to date. The map shows the rate at which the LAT detects gamma rays with energies above 300 million electron volts — about 120 million times the energy of visible light — from different sky directions. Brighter colors equal higher rates.

Brightest Gamma-Ray Flare in Universe Spotted

Credit: NASA/DOE/Fermi LAT Collaboration
Unprecedented flares from the blazar 3C 454.3 in the constellation Pegasus now make it the brightest persistent gamma-ray source in the sky as of Dec. 2009. These all-sky images, which show the numbers of high-energy gamma-rays captured by Fermi’s Large Area Telescope on Dec. 3 and Nov. 18, clearly show the change.

Giant Radio Galaxy Supercharges Big Bang Leftovers

Credit: NASA/DOE/Fermi LAT Collaboration, Capella Observatory
Fermi’s Large Area Telescope resolved high-energy gamma-rays from an extended region around the active galaxy Centaurus A. The emission corresponds to million-light-year-wide radio-emitting gas thrown out by the galaxy’s supersized black hole. This inset shows an optical/gamma-ray composite of the galaxy and its location on the Fermi one-year sky map.

Antimatter Particle Beam from Thunderstorm

Credit: NASA Goddard Space Flight Center
This NASA graphic depicts the antimatter particle beam signal observed by NASA’s Fermi Gamma-ray space observatory on Dec.14, 2009 from a terrestrial gamma-ray flash over Egypt.

How Thunderstorms Make Antimatter Particle Beams

Credit: NASA’s Goddard Space Flight Center/J. Dwyer, Florida Inst. of Technology
This NASA illustration shows how thunderstorms launch particle beams into space.

Fermi’s All-Sky Gamma-Ray Map

Credit: NASA/DOE/Fermi LAT Collaboration)
This all-sky image, constructed from two years of observations by NASA’s Fermi Gamma-ray Space Telescope, shows how the sky appears in gamma-ray light. Brighter colors indicate brighter gamma-ray sources. A diffuse glow fills the sky and is brightest along the plane of our galaxy (middle). Discrete gamma-ray sources include pulsars and supernova remnants within our galaxy as well as distant galaxies powered by supermassive black holes.

Fermi Gamma-Ray Pie Chart

Credit: NASA’s Goddard Space Flight Center
Active galaxies called blazars constitute the single largest source class in the second Fermi LAT catalog, but nearly a third of the sources are unassociated with objects at any other wavelength. Their natures are unknown.

Tycho Supernova Shines Bright in Gamma-Ray Light

Credit: Gamma ray, NASA/DOE/Fermi LAT Collaboration; X-ray, NASA/CXC/SAO; Infrared, NASA/JPL-Caltech; Optical, MPIA, Calar Alto, O. Krause et al. and DSS
Gamma rays detected by NASA’s Fermi space telescope show that the remnant of Tycho’s supernova shines in the highest-energy form of light. This portrait of the shattered star includes gamma rays (magenta), X-rays (yellow, green, and blue), infrared (red) and optical data.

 

The Secret Science of the Hubble Space Telescope’s Amazing Images

Posted in THE UNIVERSE & SPACE SCIENCE with tags on October 30, 2013 by 2eyeswatching

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Post 2597

The Secret Science of the Hubble Space Telescope’s Amazing Images

by Raphael Rosen, SPACE.com Contributor
Eagle Nebula
The Eagle Nebula, captured here by the Hubble Space Telescope, contains molecular hydrogen that can only be seen when it interacts with other molecules in space.
Credit: NASA/EAS/STScI/J Hester and P Scowen (Arizona State University) 

With the Hubble Space Telescope’s successor, the James Webb Space Telescope, on schedule to reach outer space in 2018, taking Hubble’s place as NASA’s premier eye in the sky, it seems appropriate to look back on what may become Hubble’s most enduring legacy: its stunning images. Besides the huge amount of data Hubble has collected since its launch in 1990, the telescope will likely be remembered most for its gorgeous color shots of nebulas, galaxies and the early universe, iconic images that seemed tailor made for magazine covers and bedroom walls.

But throughout the storied history of the Hubble Space Telescope, the beauty of those color images has sometimes overshadowed one important question: Where does that color come from? After all, some of Hubble’s amazing photos— and images from other space telescopes, for that matter — depict astronomical objects in ultraviolet or infrared light. But the human eye can’t perceive those colors. When people look at a Hubble image showing these hues, what exactly are they seeing?

One person with answers is Ray Villard, the news chief at Maryland’s Space Telescope Science Institute (STScI), which operates Hubble. According to Villard, the public often has the wrong idea about Hubble images. “People assume you’re painting by numbers, but you’re not,” Villard said. [Amazing Hubble Space Telescope Photos: Latest Views]

The raw Hubble images, as beamed down from the telescope itself, are black and white. But each image is captured using three different filters: red, green and blue. The Hubble imaging team combines those three images into one, in a Technicolor process pioneered in the 1930s. (The same process occurs in digital SLRs, except that in your camera, it’s automatic.)

Why are the original images in black and white? Because if Hubble’s eye saw in color, the light detector would have to have red, green and blue elements crammed into the same area, taking away crucial resolving capability. Without those different elements, Hubble can capture images with much more detail.

New Infrared View of the Horsehead Nebula — Hubble’s 23rd Anniversary Image 

This new Hubble image, captured and released to celebrate the telescope’s 23rd year in orbit, shows part of the sky in the constellation of Orion (The Hunter). Rising like a giant seahorse from turbulent waves of dust and gas is the Horsehead Nebula, otherwise known as Barnard 33. Image released April 19, 2013.
Credit: NASA, ESA, and the Hubble Heritage Team (AURA/STScI) 

The tricky part is when Hubble uses infrared or ultraviolet filters. These wavelengths of light, respectively above and below the visible spectrum,are full of what Villard calls “invisible colors.” Human eyes simply don’t see them. Therefore, if astronomers want to make these images reflect the light’s full spectrum—including ultraviolet and infrared wavelengths – visible colors have to be added in.

Those added colors aren’t random, though. “A common misconception,” noted Villard, “is that when people hear that color is added, they think that the scientists are like kids with crayons.” On the contrary, astronomers are very careful to stay as true to nature as they can. Thus, in full-spectrum images, the details that correspond to infrared light will have the reddest color and the details corresponding to ultraviolet will have the bluest. Or, as Zolt Levay, the imaging-resource lead at STScI, put it, “What is redder in a Hubble imagereally is redder.”

In short, the coloring process for Hubble images is not done willy-nilly.”The colors of the images have meaning,” said Levay. “They depend on the data.” When people at STScI work with a full-spectrum Hubble image, they are in essence translating one kind of light into another so human beings can perceive it.

All of this manipulation begs one enormous question: Why add color at all? If the coloring process necessarily involves human manipulation, wouldn’t it be better, and safer, to stay with the original black-and-white versions?

Villard claims the contrary. Color images are “full of information,” he said. “In fact, color is an analytical tool. It helps the understanding.”

The Hubble team uses color in three ways.

The Hubble Space Telescope in orbit.
Credit: STS-82 Crew/STScI/NASA

First, for objects that would otherwise be too faint for the human eye to see,the team adds color to make the objects visible. Second, the team uses color to depict details that the human eye can’t see, like astronomical features only visible in infrared or ultraviolet light. Third, color can highlight delicate features that would be otherwise lost.

For example, Hubble took one 1995 image of the Cat’s Eye Nebula using three filters: one that captured light produced by oxygen atoms, one for light produced by hydrogen atoms and one for light coming from nitrogen ions. All three colors, though, fall in the red part of the visible spectrum. To make all of the parts of the nebula as visible as possible, and to avoid just producing a red mess, the imaging team made some adjustments. [Photos: Hubble’s Ring Nebula Portraits]

They assigned red to the hydrogen light, green to the nitrogen light and blue to the oxygen light. Human beings then assigned the colors, but not without a reason behind every decision. As Levay noted, the coloring process is “a dance between the subjective (the color that’s applied) and the objective (the data).”

A centuries-old debate among philosophers bears directly on this issue of astronomical images, color and reality. The question is whether colors exist in objects and human beings merely see what is out there in the world, or whether colors are, in a sense, properties of the mind that arise when human beings perceive something, and are experienced differently from one individual to another. Leave it to the Hubble Space Telescope to connect an ancient intellectual tradition with cutting-edge technology and the wonders of nebulas, galaxies and burning suns.

Follow us @SpacedotcomFacebook and Google+. Original article on SPACE.com.

New Computer Programming Language Imitates The Human Brain

Posted in SCIENCE, GEOLOGY,HEALTH, INVIRONMENT, TECHNOLOGY,ANTHROPOLOGY, ARCHAEOLOGY, with tags on October 30, 2013 by 2eyeswatching

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Post 2596

New Computer Programming Language Imitates The Human Brain

GEORGE DVORSKY  http://io9.com/new-computer-programming-language-imitates-the-human-br-1080026417

As we pointed out earlier this week, we’re still far from being able to replicate the awesome power of the human brain. So rather than use traditional models of computing, IBM has decided to design an entirely new computer architecture — one that’s taking inspiration from nature.

For nearly 70 years, computer scientists have depended upon the Von Neumann architecture. The computer that you’re working on right now still uses this paradigm — an electronic digital system driven by processors and consisting of various processing units, including an arithmetic logic unit, a control unit, memory, and input/output mechanisms. These separate units store and process information sequentially, and they use programming languages designed specifically for those architectures.

But the human brain, which most certainly must be a kind of computer, works a lot differently. It’s a massively parallel, massively redundant “computer” capable of generating approximately 1016 processes per second. It’s doubtful that it’s as serialized as the Von Neumann model. Nor is it driven by a proprietary programming language (though, as many cognitive scientists would argue, it’s likely driven by biologically encoded algorithms). Instead, the brain’s neurons and synapses store and process information in a highly distributed, parallel way.

Which is exactly how IBM’s new programming language, called Corelet, works as well. The company disclosed its plans at the the International Joint Conference on Neural Networks held this week in Dallas.

New Computer Programming Language Imitates The Human Brain

Credit: IBM.

Researchers from IBM are working on a new software front-end for theirneuromorphic processor chips. The company is hoping to draw inspiration from its recent successes in “cognitive computing,” a line of R&D that’s best exemplified by Watson, the Jeopardy-playing AI. The new programming language will be necessary because once IBM’s cognitive computers become a reality, they’ll need a completely new one to run them. Many of today’s computers still use programming derived from FORTRAN, a language developed in the 1950s for ENIAC.

The new software runs on a conventional supercomputer, but it simulates the functioning of a massive network of neurosynaptic cores. Each core contains its own network of 256 neurons which function according to a new model in which digital neurons mimic the independent nature of biological neurons. Corelets, the equivalent of “programs,” specify the basic functioning of neurosynaptic cores and can be linked into more complex structures. Each corelet has 256 outputs and inputs, which are used to connect to one another.

“Traditional architecture is very sequential in nature, from memory to processor and back,” explained Dr. Dharmendra Modha in a recent Forbes article. “Our architecture is like a bunch of LEGO blocks with different features. Each corelet has a different function, then you compose them together.”

So, for example, a corelet can detect motion, the shape of an object, or sort images by color. Each corelet would run slowly, but the processing would be in parallel.

IBM has created more than 150 corelets as part of a library that programmers can tap.

Eventually, IBM hopes to create a cognitive computer scaled to 100 trillion synapses.

But there are limits to the proposed technology. Alex Knapp explains:

Of course, even those hybrid computers won’t be a replacement for the human brain. The IBM chips and architecture may be inspired by the human brain, but they don’t quite operate like it.

“We can’t build a brain,” Dr. Modha told me. “But the world is being populated every day with data. What we want to do is to make sense of that data and extract value from it, while staying true to what can be build on silicon. We believe that we’ve found the best architecture to do that in terms of power, speed and volume to get as close as we can to the brain while remaining feasible.”

Corelet could enable the next generation of intelligent sensor networks that mimic the brain’s abilities for perception, action, and cognition.

More in this video:

 

 

 

http://www.youtube.com/watch?feature=player_embedded&v=J69EJxUr8mw