Vatican Says Pope Benedict Will Resign Feb. 28

Pope Benedict XVI announced today that he will resign Feb. 28, saying his role requires "both strength of mind and body."

The pope's decision makes him the first pontiff to resign in nearly 600 years. A conclave to elect a new pope will take place before the end of March. The 85-year-old pope announced the decision to resign in Latin during a meeting of Vatican cardinals.

FULL COVERAGE: Pope Benedict XVI Resignation

"After having repeatedly examined my conscience before God, I have come to the certainty that my strengths due to an advanced age are no longer suited to an adequate exercise of the Petrine ministry," he said. "I am well aware that this ministry, due to its essential spiritual nature, must be carried out not only by words and deeds but no less with prayer and suffering."

Pope Benedict XVI was the oldest pope to be elected at age 78 on April 19, 2005. He was the first German pope since the 11th century and his reign will rank as one of the shortest in history at seven years, 10 months and three days.

RELATED: Pope Benedict XVI Resigns: The Statement

The last pope to resign was Pope Gregory XII, who stepped down in 1415.

Vatican officials said they've noticed that he has been getting weaker, while Benedict said he is aware of the significance of his decision and made it freely.

Vatican Communications Director Greg Burke told ABC News that he was surprised but not shocked by the announcement, and cited an interview in which Benedict said a pope not only could resign, but should resign, if necessary.

Pope Benedict XVI Resignation: Who Will Be Next? Watch Video

"[Pope Benedict] is slowing a bit, and there's nothing immediately serious or grave," Burke said. "He has an older brother. He just thought the demands of the job were too much for his physical well being."

INTERACTIVE: Key Dates in the Life of Pope Benedict XVI

Benedict's brother, Monsignor Georg Ratzinger, had shared his concerns about the pope's health in September 2011, telling Germany's Bunte magazine that he should resign if health issues made the work impossible. More recently, Ratzinger has apparently cited his brother's difficulty in walking and his age, saying that Benedict had been advised by his doctor to cease transatlantic trips and that he had been considering stepping down for months, according to the German DPA news agency.

Among other ailments, the pope reportedly suffers from arthritis and arthrosis -- a debilitating joint-degeneration condition -- and his declining health drew attention about a year ago when he used a cane at the airport on his way to a trip to Mexico and Cuba.

Benedict has been a less charismatic leader than his predecessor, John Paul II, but tending to the world's roughly 1 billion Catholics still requires stamina Benedict seems to believe he now lacks.

PHOTOS: Pope Benedict XVI Through the Years

"Obviously, it's a great surprise for the whole church, for everyone in the Vatican and I think for the whole Catholic world," the Rev. John Wauck, a U.S. priest of the Opus Dei, told "Good Morning America" today. "But, at the same time, it's not completely surprising given what the pope had already written about the possibility of resigning.

"It's clear in terms of his mental capacity he's in excellent shape, he's very sharp, and so when he says he's making this official with whole freedom, it's clear that that's the case, that makes one believe that this is an act taken out of a sense of responsibility and love for the church."

It is a road that leads back to the 1930s.

Ratzinger started seminary studies in 1939 at the age of 12. In his memoirs, he wrote of being enrolled in Hitler's Nazi youth movement against his will when he was 14 in 1941, when membership was compulsory. In 1943, he was drafted into a Nazi anti-aircraft unit in Munich. He says he was soon let out because he was a priest in training.

He returned home only to find an army draft notice waiting for him in the fall of 1944.

As World War II came to an end, the 18-year-old Ratzinger deserted the army. In May 1945, U.S. troops arrived in his town and he was sent to a prisoner-of-war camp.

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Time to rinse! AI assistant helps clean your teeth

FOR most of us, brushing our teeth is just a tedious part of the daily grind. But for people with dementia or learning difficulties, such tasks can be difficult. They could soon gain more independence thanks to an AI designed by Christian Peters at Bielefeld University in Germany and his colleagues.

Peters has already come up with a system that guides people when washing their hands. Brushing teeth is more complicated because it involves many steps - such as putting toothpaste on the brush, filling a glass with water or rinsing the mouth.

The TEBRA system uses a video camera to monitor someone brushing their teeth and checks that each step happens at the right time. It prompts them via a screen on the washstand if they forget a step or if they get stuck. The idea is not to dictate a routine, but to adapt to that of the user, says Peters.

TEBRA is being tested at a care home in Bielefeld for people with learning disabilities. Caregivers there reported that the system was less distracting for some people than a human carer. The work will be presented at the International Conference on Health Informatics in Barcelona, Spain, next week. Peters also plans to adapt his system to tasks such as shaving.

This article appeared in print under the headline "Time to rinse! An AI to help you clean your teeth"

If you would like to reuse any content from New Scientist, either in print or online, please contact the syndication department first for permission. New Scientist does not own rights to photos, but there are a variety of licensing options available for use of articles and graphics we own the copyright to.

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Three Korean doctors slain in north Nigeria: police

KANO, Nigeria: Men armed with knives slit the throats of three South Korean doctors in a pre-dawn attack Sunday in a volatile town in northeastern Nigeria in the latest in a spate of killings of foreigners in recent months, police said.

The attack in Potiskum also came just two days after gunmen killed at least 10 people in horrifying attacks on two Nigerian polio clinics in a new blow to the campaign to wipe out disease, but it was not clear if the incidents were related.

Yobe State police commissioner Sanusi Rufa'i would not say if the Islamist group Boko Haram, which has been active in Potiskum, was responsible for Sunday's killings, but that the attack was being investigated.

He said unknown attackers scaled the fence of an apartment housing the three doctors at around 1:00 am and slit their throats, initially describing the victims as Chinese.

"Further investigations have shown that the victims were Korean nationals and not Chinese as earlier stated. They were doctors from South Korea," Rufa'i told AFP, in comments confirmed by a senior military official in the state.

Residents said the Koreans, whose bodies were found by neighbours, were employees of the state ministry of health and had been living in the city for one year.

In Seoul, the foreign ministry said it was checking the reports, but noted that few Koreans live in the town.

"The chance that the slain would be Koreans is not high," a foreign ministry official told Yonhap news agency. "But we are checking further related situations via diverse channels."

A local resident said the bodies of the Koreans were found in their room by neighbours who alerted security agents,

"People became worried when the doctors did not open their door in the morning," one resident who did not want to be named told AFP.

He said the victims had their throats slit, but it was not immediately clear if the assailants also came with guns.

"It is still premature to point any accusing fingers but we have commenced an investigation to unravel the killings," said Rufa'i, adding: "No arrest has been made."

Sunday's attack was the latest in a spate of killings of foreigners, especially Chinese nationals, in the country's restive northeast.

In November, gunmen shot dead two Chinese construction workers in nearby Borno State, the stronghold of the Boko Haram extremists.

Three other Chinese nationals have also been killed in separate attacks in the region.

Although no group claimed responsibility for the attacks, they were similar to previous strikes against foreigners by Boko Haram.

Violence linked to Boko Haram is believed to have left some 3,000 people dead since 2009, including killings by the security forces.

The killings in Potiskum, which lies about 100 kilometres (60 miles) from the state capital Damaturu, followed attacks on other health workers in the northern city of Kano on Friday.

Nine women and a man were shot dead in two separate attacks in Kano after a local cleric denounced polio vaccination campaigns and some local radio stations aired conspiracy theories about the vaccine being a Western plot to harm Muslims.

Nigerian President Goodluck Jonathan condemned Friday's killings, describing them as "dastardly terrorist attacks" and vowed to track down the perpetrators.

Boko Haram has claimed to be fighting for the creation of an Islamic state, but its demands have shifted repeatedly and it is believed to include various factions. Criminal gangs and imitators are also suspected of carrying out violence under the guise of the group.

Nigeria, Africa's most populous nation and largest oil producer, is divided between a mainly Muslim north and predominantly Christian south.

- AFP/ck

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AktiMate Micro speakers, better than Bluetooth

The AktiMate Micro speakers in white

(Credit:
AktiMate)

To be honest, I've never heard a Bluetooth speaker I liked, because better sound was available from wired speakers, like the AktiMate Micro model. They're sold in pairs for $499, so you get true stereo sound, a rarity even with higher-end Bluetooth and most other wireless alternatives like the $600 Bowers & Wilkins Zeppelin Air, $600 Bose SoundDock 10, or $399 Sonos Play:5. Those three are perfectly fine for what they are, but wired stereo speakers from Audioengine, Emotiva, and AktiMate sound better, much closer to what I hear from traditional hi-fi speakers. True, they're not as easy to move from room to room as those wireless models, so if mobility is a higher priority than sound, pick up a wireless speaker.

The AktiMate Micros have a proprietary 4-inch Kevlar woofer and a 1-inch soft-dome tweeter. The back panels have a slot port. The desktop-friendly design measures a tidy 5.7x7.87x9.45 inches, and they are available in high-gloss red, white, or black.

The left speaker houses an in-house-designed stereo 40-watt Class D amp that powers both speakers, a stereo analog 3.5mm input and a USB input, and on the front baffle, an input selector and rotary volume control. The built-in DAC tops out at 16-bit/48KHz audio, and it's not bad, but you can easily do better with an inexpensive external DAC, like my $99 Schiit Modi. Then again, the Micro's internal DAC is about average for a desktop speaker -- none of them are standouts -- but the Micro's DAC will certainly clobber the sound available from your computer's analog jacks.

The top of the left speaker also has a flip-open panel that reveals a 30-pin docking connector compatible with most older-generation iPhones and iPods, but not the latest Apple devices with the Lightning connector. The right speaker is passive and just has a pair of all-metal binding posts on the back panel.

I played my
iPod Classic, docked to the Micros, and was impressed by the speakers' clarity and resolution. Bass isn't as deep or full as from the Audioengine A5+ speakers, for comparison, but the Micros' low end is tauter and more precise. To maximize the speakers' bass output I put them near a wall, and that filled out the bottom a bit. The little guys play loud enough to fill a decent-size room.

I watched a few movies and was generally satisfied with the Micros' sound, but home theater bombast was in short supply. I don't see an easy way to add a subwoofer to the system, but the sound on straight dramas and comedies was very good. Dialogue was articulate and natural.

Comparing the Micros with my desktop reference Emotiva Airmotiv 4 speakers ($349/pair), the differences were readily apparent. The Airmotiv 4s make more bass, but the Micros were more dynamically alive. The Airmotiv 4s played louder and had superior treble extension, but the Micros were more open and had better soundstage depth. I like both speakers, but I'm sticking with my Emotivas.

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Year of the Snake: The Serpent Behind the Horoscope

On February 10, people all around the world will ring in the Lunar New Year with paper lanterns and firecrackers. At the heart of it all sits the snake, a slithery reptile feared for its sharp fangs and revered for its undeniable charm. (Watch videos of some of the world's deadliest snakes.)

Those born in the Year of the Snake are said to be intelligent and quick thinking, but they can also be dishonest and prone to show off. Though based on Chinese astrology, some of these traits are similar to characteristics of the actual serpent.

Snakes are known to be great at outsmarting their predators and prey. Their colorful, patterned skin makes them some of the best tricksters in the animal kingdom. And despite a bad rap as frightening creatures, snakes never fail to fascinate scientists, explorers, and zoo-goers. (See pictures of snakes.)

With more than 3,400 recognized species, snakes exhibit incredible diversity in everything from behavior and habitats to skin colors and patterns.

"As a vertebrate lacking in limbs, all snakes look largely like other snakes, yet they succeed in tremendous diversity in multiple directions," said Andrew Campbell, herpetology collections manager at the University of Kansas Biodiversity Institute.

To usher in the Year of the Snake, Campbell and herpetologist Dennis Ferraro at University of Nebraska-Lincoln weigh in on some of the snake's qualities that the Chinese zodiac predicts people born this year will have.

Horoscope: Snakes have an innately elegant personality but can also be ostentatious at times.

In Nature: Snakes come in all different colors, patterns, and textures, making them some of nature's most visually stunning creatures.

According to Campbell, the utility of their coloring falls into two main categories: to use as camouflage and to warn predators to stay away.

Among the most beautiful are the emerald tree boa (Corallus caninus)—whose vibrant green body is decorated with white stripes resembling lightning bolts—and the Brazilian rainbow boa (Epicrates cenchria), characterized by its iridescent skin and the large black rings down its back.

For some snakes, the diversity in color occurs within the same species, which is why Ferraro tells his student not to identify snakes by colors. For example, the polymorphic bush viper (Atheris squamigera), many of which are green, also come in shades of yellow, orange, red, and blue, as captured in photographer Guido Mocafico's "Serpent Still Life" photo series.

Horoscope: The snake is known to be the master seducer of the Chinese zodiac.

In Nature: Female garter snakes (Thamnophis) have all the luck with the gentlemen.

When a female garter snake is ready to mate, she announces it by producing chemicals called pheromones. Males, upon encountering the scent, immediately come crawling out and gather around the female in a large, wriggling "mating ball."

The competition intensifies when a male passing by the ball tries to fool the others by producing a scent that mimics that of the female, said Ferraro.

As soon as his rivals are led off in the wrong direction, the trickster slides right in. In areas with smaller populations of garter snakes, each ball consists of about 12 males and one female.

But in places like Manitoba, Canada, where garter snakes travel to certain areas to mate after coming out of hibernation, a mating ball can have thousands of males and only a hundred females.

Horoscope: Though snakes don't often tell lies, they will use deception when they feel it's necessary and they think they can get away with it.

In Nature: When it comes to using trickery to catch dinner, or to hide from predators, snakes are no amateurs.

Their sneaky techniques range from tricking fish to swim right into their mouths, to playing dead when threatened, to using their wormlike tails to lure in prey.

The most cunning of them all is the two-headed snake. To protect against a sneak attack from behind, the two-headed snake's tail looks just like its head. While the business end looks for food, the snake coils up its body and rests its tail on top to look like it is on guard.

The tail can even mimic the behavior of a retreating snake to trick predators into thinking they're going face-to-face with their opponent.

Horoscope: When snakes get down to work, they are organized and highly efficient, and they work quickly and quietly.

In Nature: While snakes are often perceived as lazy, Campbell said people are mistaken. "What we perceive as shy, lazy, or inactive is really efficiency," he said.

"On average, they are bigger than other lizards and can build a lot of body mass. They do that by being efficient in feeding and traveling." In other words, snakes don't move very much because they don't have to.

When it comes to food, snakes catch prey that are significantly larger than them so they can eat less frequently. This reduces the time they spend hunting and thus makes them less vulnerable to falling victim to a predator themselves.

For Campbell, the most impressive hunter is the eastern diamondback rattlesnake (Crotalus Adamanteus), which is able to hunt and kill its prey very quickly using venom, so it doesn't have to travel far. "Because they don't have to do that, they can become relatively large and heavy, being able to build up body mass and not having to spend that energy hunting."

Horoscope: Snakes are charming, with excellent communication skills.

In Nturea: For snakes, their visual and auditory senses don't mean much when it comes to communicating with each other.

Instead, they use their sense of smell and the chemicals produced by their musk glands. Unlike mammals, a snake picks up scent through the forks of its tongue.

When the snake retracts its tongue, it inserts the forks into grooves in an olfactory organ located at the roof of its mouth. Depending on which fork picks up a stronger scent, the snake knows in which direction to go when looking for prey or a mate.

It's when snakes are threatened that they use sight and sound, said Ferraro. Rattlesnakes, for example, shake their tails, making a loud rattling noise to ward off predators.

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Paternos Issue Report, Challenge Freeh's Findings

A report commissioned by Joe Paterno's family says the late coach did nothing wrong in his handling of the Jerry Sandusky child sex abuse scandal and portrays the late Hall of Fame coach as the victim of a "rush to injustice" created by former FBI director Louis Freeh's investigation of the case for Penn State.

The family's critique, released Sunday, argues that the findings of the Freeh report published last July were unsupported by the facts.

Former U.S. Attorney General Dick Thornburgh, one of the experts assembled by the family's lawyer to review Freeh's report last year to Penn State, called the document was fundamentally flawed and incomplete.

Freeh's report reached "inaccurate and unfounded findings related to Mr. Paterno and its numerous process-oriented deficiencies was a rush to injustice and calls into question" the investigation's credibility, Thornburgh was quoted as saying.

In a statement released Sunday through a spokesman, Freeh defended his work.

"I stand by our conclusion that four of the most powerful people at Penn State failed to protect against a child sexual predator harming children for over a decade," he said.

Paterno's family released what it billed as an exhaustive response to Freeh's work, based on independent analyses, on the website paterno.com.

Patrick Smith/Getty Images|Gene J. Puskar/AP Photo

Jerry Sandusky Insists Innocence Before Sentencing Watch Video

Jerry Sandusky Sentencing: Why Did He Release Statement? Watch Video

Jerry Sandusky Claims Innocence in Audio Statement Watch Video

"We conclude that the observations as to Joe Paterno in the Freeh report are unfounded, and have done a disservice not only to Joe Paterno and the university community," the family's report said, "but also to the victims of Jerry Sandusky and the critical mission of educating the public on the dangers of child sexual victimization."

Freeh's findings also implicated former administrators in university president Graham Spanier, athletic director Tim Curley and retired vice president Gary Schultz. Less than two weeks after the Freeh report was released in July, the NCAA acted with uncharacteristic speed in levying massive sanctions against the football program for the scandal.

"Taking into account the available witness statements and evidence, it is more reasonable to conclude that, in order to avoid the consequences of bad publicity, the most powerful leaders at Penn State University — Messrs. Spanier, Schultz, Paterno and Curley — repeatedly concealed critical facts relating to Sandusky's child abuse" from authorities, trustees and the university community, Freeh wrote in releasing the report.

The former administrators have vehemently denied the allegations. So, too, has Paterno's family, though it reserved more extensive comment until its own report was complete.

The counter-offensive began in earnest this weekend. The family's findings said that Paterno:

— Never asked or told anyone not to investigate an allegation made against Sandusky 12 years ago, Saturday, Feb. 9, 2001.

— Never asked or told former administrators not to report the 2001 allegation.

— And never asked or told anyone not to discuss or hide information reported by graduate assistant Mike McQueary about the 2001 allegation.

"Paterno reported the information to his superior(s) pursuant to his understanding of university protocol and relied upon them to investigate and report as appropriate," the family's analysis said.

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Sooty ships may be geoengineering by accident

GEOENGINEERING is being tested - albeit inadvertently - in the north Pacific. Soot from oil-burning ships is dumping about 1000 tonnes of soluble iron per year across 6 million square kilometres of ocean, new research has revealed.

Fertilising the world's oceans with iron has been controversially proposed as a way of sucking carbon dioxide out of the atmosphere to curb global warming. Some geoengineers claim releasing iron into the sea will stimulate plankton blooms, which absorb carbon, but ocean processes are complex and difficult to monitor in tests.

"Experiments suggest you change the population of algae, causing a shift from fish-dominated to jellyfish-dominated ecosystems," says Alex Baker of the University of East Anglia, UK. Such concerns led the UN Convention on Biological Diversity (CBD) to impose a moratorium on geoengineering experiments in 2010.

The annual ship deposition is much larger, if less concentrated, than the iron released in field tests carried out before the moratorium was in place. Yet because ship emissions are not intended to alter ocean chemistry, they do not violate the moratorium, says Jim Thomas of the ETC Group, a think tank that consults for the CBD. "If you intentionally drove oil-burning ships back and forth as a geoengineering experiment, that would contravene it."

The new study, by Akinori Ito of the Japan Agency for Marine-Earth Science and Technology, is the first to quantify how shipping deposits iron in parts of the ocean normally deficient in it. Earlier models had assumed that only 1 to 2 per cent of the iron contained in aerosols, including shipping emissions, is soluble in seawater, so the remaining 98 to 99 percent would sink to the bottom without affecting ocean life. But Ito found that up to 80 per cent of the iron in shipping soot is soluble (Global Biogeochemical Cycles, doi.org/kdj). As this soot rapidly falls to the sea surface, it is likely to be fertilising the oceans.

In the high-latitude north Pacific - a region that is naturally iron-poor and therefore likely to be most affected by human deposits - ship emissions now account for 70 per cent of soluble iron from human activity, with the burning of biomass and coal accounting for the rest. Shipping's share will rise as traffic continues to grow and regulations restrict coal and biomass emissions.

Can we learn anything from this unintentional experiment? Baker thinks not. "The process isn't scientifically useful," he says, because the uncontrolled nature of the iron makes it difficult to draw meaningful comparisons.

The depositions are unlikely to be harmful at current levels, he says, but "given the uncertainties, I just don't know how much these iron emissions would have to increase before there was demonstrable harm to an ecosystem, or benefit in terms of carbon uptake, for that matter".

This article appeared in print under the headline "Ships inadvertently fertilise the oceans"

If you would like to reuse any content from New Scientist, either in print or online, please contact the syndication department first for permission. New Scientist does not own rights to photos, but there are a variety of licensing options available for use of articles and graphics we own the copyright to.

All comments should respect the New Scientist House Rules. If you think a particular comment breaks these rules then please use the "Report" link in that comment to report it to us.

If you are having a technical problem posting a comment, please contact technical support.

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Horsemeat 'contamination' could date back to August: Findus

LONDON: French frozen food supplier Comigel told the Findus brand that "the contamination" of processed beef products with horsemeat could date back to August 2012, Findus said in a statement Saturday.

"Findus want to be absolutely explicit that they were not aware of any issue of contamination with horsemeat last year," it said in a statement.

"They were only made aware of a possible August 2012 date through a letter dated 2 February 2013 from the supplier Comigel.

"By then Findus was already conducting a full supply chain traceability review and had pro-actively initiated DNA testing."

The opposition Labour lawmaker Tom Watson earlier claimed he had been shown by a retailer a copy of a letter that Findus sent to them on Monday.

He published an extract on his website.

"Investigations have led one of our suppliers based in France to inform us in writing on 2nd February 2013 that the raw materials delivered since 1st August 2012 are likely to be non-conform and consequently the labelling on finished products is incorrect," it said.

Britain's Food Standards Agency regulator announced Thursday that 11 of 18 samples of Findus beef lasagne were found to contain between 60 and 100 per cent horsemeat.

Asked by AFP to comment on Britain's food minister fearing a criminal conspiracy, a Findus spokesman said: "That's part of our investigations. We need to understand how the meat got into the supply chain. That's something we are working on with Comigel, as the supplier."

He did not know how long the investigation would take.

The spokesman said it was "still uncertain... where the meat exactly came from".

"The supplier has asked us to withdraw the raw material batches."

Findus said it was not taking part in the emergency food industry meeting taking place Saturday at the Department for Environment, Food and Rural Affairs.

"Findus did not receive an invitation to this summit. However they are aware that the Food and Drink Federation, of which they are a member, will be attending."

Sweden-based Findus has withdrawn various frozen meals from the market in France and Sweden.

- AFP/ck

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Poll: Do you listen to movies or TV over headphones?

I suppose it's still a fair assumption that more people listen to music than movies with headphones, but there has to be a growing audience listening to movies, TV shows, and YouTube videos via their headphones. Thanks to the booming popularity of tablets, might the ratio of movies-to-music listening time be moving away from music? Or not?

I watch a lot of movies at home with headphones on. They present a level of detail that you can get from speakers only when you play them really loud. With headphones, I don't have to crank the volume. They're also handy when other people in my apartment are sleeping.

If you watch movies or TV shows on an
iPad, headphones are the most likely way you'd listen. Some folks probably use a single Bluetooth speaker for movie sound with
tablets, but then again, if you have a decent home theater you're more likely to listen with speakers. Do you watch movies on your computer, and if you do, do you prefer headphones or speakers? Do your headphones sound better than your computer speakers? Of course, where you watch may skew the headphone vs. speaker preference one way or another.

Please share your movie vs. music listening over headphones experiences in the Comments section.

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Space Pictures This Week: Sun Dragon, Celestial Seagull

• 
  
  
  
  
  
  
  

  Solar Dragon

  Image courtesy SDO/NASA

  Resembling a dragon's tail, remnants of a solar filament strain to escape the sun's gravity in an image released this week by NASA's Solar Dynamics Observatory.

  Most of the electrically charged gas, imaged in extreme ultraviolet light, was unsuccessful in its escape attempt and fell back into the sun.

  Filaments form when magnetic field lines push out of the sun in loops, holding dense gas above the surface of the sun. (Read about a huge solar filament that erupted in August 2012.)

  —Jane J. Lee and Christine Dell'Amore

  Published February 8, 2013

  
  











• 
  
  
  
  
  
  
  

  Aurora On The Road

  Photograph by Marcel Mivelaz, My Shot

  Northern lights writhe behind a thin cloud layer above a road on Ringvassoya Island, Norway, in this picture submitted to National Geographic's My Shot photography community on January 31.

  Born of violent eruptions of plasma from the sun's surface, auroras occur when the ejected gas slams into the protective bubble of Earth's magnetic field. (Watch a video about the birth of auroras.)

  Published February 8, 2013

  
  











• 
  
  
  
  
  
  
  

  Celestial Seagull

  Image courtesy ESO

  Like a parrot perched on a pirate's arm, the Seagull Nebula resides in one of the spiral arms of the Milky Way.

  This new image, released by the European Southern Observatory on February 6, shows a closeup of one of the "wings" of the Seagull Nebula. Red clouds of hydrogen gas glow from the intense ultraviolet radiation given off with the birth of stars.

  The entire nebula is actually comprised of three large gas clouds arranged in the shape of a bird. (See pictures of other nebulae.)

  Published February 8, 2013

  
  











• 
  
  
  
  
  
  
  

  Saturn's North Pole

  Image courtesy Caltech/SSI/NASA

  Saturn's hexagon-shaped north pole is lit by the sun now that spring has come to the planet's northern hemisphere, as seen in a NASA picture released this week.

  The 15,000-mile-wide (25,000-kilometer-wide) cloud formation, captured by the Cassini spacecraft's wide-angle camera in November, was initially spied during the Voyager missions in the 1980s. (See another Cassini picture of the hexagon.)

  Published February 8, 2013

  
  











• 
  
  
  
  
  
  
  

  Martian Avalanches

  Image courtesy U. Arizona/NASA

  A 2011 frost avalanche kicks up dust on Mars in a picture released this week by Mars Reconnaissance Orbiter's HiRISE camera team.

  Frost avalanches usually occur at the onset of the Martian spring, when layers of carbon dioxide frost warm, causing ice and dust to cascade off of cliffs.

  "While HiRISE has captured other frost avalanches before, they never cease to amaze, since it demonstrates that there are indeed active processes on the red planet," according to the HiRISE website. (Related: "First Mars Avalanches Seen In Action.")

  Published February 8, 2013

  
  











• 
  
  
  
  
  
  
  

  Luminous London

  Photograph courtesy NASA

  London gleams in a nighttime picture taken from the International Space Station on February 2.

  Expedition 34 Flight Engineer Chris Hadfield captured the English city while flying about 240 miles (400 kilometers) above Earth.

  Published February 8, 2013

  
  











• 
  
  
  
  
  
  
  

  Illustration courtesy Foster and Partners/ESA

  Published February 8, 2013

  
  

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Great Energy Challenge Blog

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