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Archive for the ‘Airspace’ Category

Pilotless Boeing aircraft raises prospect manned dogfights 65000ft

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The maiden flight of a revolutionary drone aircraft that can stay in the air for four days at 65,000 feet is just days away.

The Phantom Eye, made by Boeing’s secretive Phantom Works division, is powered by hydrogen and is designed to carry out surveillance and reconnaissance missions while remaining at high altitude. It will produce only water as a by-product.

Its inaugural flight will take place at Edwards Air Force Base in California and is expected to last between four and eight hours.

Phantom Eye: The technology behind it means pilotless dog-fights have come a step closer

Phantom Eye: The technology behind it means pilotless dog-fights have come a step closer

Boeing also is developing a larger unmanned plane that will stay aloft for more than 10 days and ‘Phantom Ray,’ a fighter-sized UAV that will be a test bed for more advanced technologies, which made its inaugural flight in April.

The drone technologies being developed by Phantom Works mean the day when dog fights take place between unmanned aircraft is getting much closer.

‘Phantom Eye is the first of its kind and could open up a whole new market in collecting data and communications,’ Darryl Davis, president of Boeing Phantom Works, said.

‘It is a perfect example of turning an idea into a reality. It defines our rapid prototyping efforts and will demonstrate the art-of-the-possible when it comes to persistent intelligence, surveillance and reconnaissance.

‘The capabilities inherent in Phantom Eye’s design will offer game-changing opportunities for our military, civil and commercial customers.’

An artist's impression of the high-altitude spy plane

An artist’s impression of the high-altitude spy plane.

‘It’s exciting to be part of such a unique aircraft,’ said Drew Mallow, Phantom Eye program manager for Boeing.

‘The hydrogen propulsion system will be the key to Phantom Eye’s success. It is very efficient and offers great fuel economy, and its only byproduct is water, so it’s also a “green” aircraft.’

Phantom Eye is powered by two 2.3-litre, four-cylinder engines that provide 150 horsepower each. It has a 150-foot wingspan, will cruise at approximately 150 knots and can carry up to a 450-pound payload.

 

Via DailyMail

Nasa satellite UARS nearing Earth ‘could land anywhere’

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Upper Atmosphere Research Satellite

A five ton, 20-year-old satellite has fallen out of orbit and is expected to crash somewhere on Earth on or around 24 September, according to Nasa.

Nasa says the risk to life from the UARS – Upper Atmosphere Research Satellite – is just 1 in 3,200.

It could land anywhere between 57 degrees north and 57 degrees south of the equator – most of the populated world.

However, most of the satellite will break or burn up before reaching Earth.

Scientists have identified 26 separate pieces that could survive the fall through the earth’s atmosphere, and debris could rain across an area 400-500km (250-310 miles) wide.

Nasa said scientists would only be able to make more accurate predictions about where the satellite might land two hours before it enters the Earth’s atmosphere.

Falling space debris

Rocket propellant tank (Nasa)
  • Hardware re-enters at shallow angles (<1 degree)
  • Some 50 items weighing >1 tonne re-enter a year
  • Major break-up occurs about 80km altitude
  • 10-40% of dry mass on orbit will survive
  • Debris spreads over long, thin “footprints”
  • It can be a hazard to people and property

Re-entry

The 1 in 3,200 risk to public safety is higher than the 1 in 10,000 limit that Nasa aims for.

However, Nasa told reporters that nobody had ever been hurt by objects re-entering from space.

Members of the public are not allowed to keep pieces of the satellite that may fall to Earth, or sell them on eBay, as they remain the property of the US government.

The UARS was launched in 1991 by the Discovery space shuttle, and was decommissioned in 2005.

The latest satellite re-entry is much smaller than Skylab, a satellite that re-entered the earth’s atmosphere in 1979.

It was some 15 times heavier than the UARS, and when it crashed in Western Australia the US government had to pay clean-up costs to the Australian government.

Sputnik 2 crashed on Earth in 1958, travelling from over New York to the Amazon in 10 minutes. It was viewed by many people and left a trail of brightly coloured sparks behind it.

Via BBC

Written by Nokgiir

September 19, 2011 at 2:48 am

Japan’s citizen scientists map radiation, DIY-style

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With the Japanese government only providing spotty information about the radiation leaking from the damaged Fukushima nuclear plant in the early days after the devastating March 11 earthquake and tsunami, a group of tech-minded citizen scientists set out to fill in the “black holes” in the knowledge base.

They did so by crafting their own Geiger counters and handing them out to volunteers in the disaster area to measure the fallout. Months later, they have assembled thousands of radiation readings plotted on maps that they hope will one day be an invaluable resource for researchers studying the impact of the meltdown at the crippled nuclear complex.

Volunteer Toshikatsu Watanabe, left, and Safecast’s Kalin Kozhuharov take radiation measurements in Koriyama, Japan.

The volunteer network of scientists, tech enthusiasts and residents of Japan collectively known as Safecast (an amalgam of “safety” and “broadcast”) sprang to life in the weeks after the devastating 9.0-magnitude earthquake and tsunami struck Japan, cutting off power to the Fukushima Daiichi Nuclear Power Station and knocking out its backup generators. That shut down the plant’s cooling system, triggering meltdowns or partial meltdowns in three of the plant’s four reactors, followed by explosions that released radioactive substances into the air and allowed contaminated water to leak into the ocean.

“For the scientific community, this is a huge chance to further understand what this all means,” said Pieter Franken, co-founder of Safecast and a senior researcher at Keio University in Tokyo, which is collaborating on the project. “Chernobyl was 25 years ago and delivered lots of information. But we’re now in the Internet age, and we have a huge opportunity to do a much better job in measuring it and tracking it.”

Residents in the surrounding areas were understandably alarmed, but in the early days after the disaster, information from the government came in bits and pieces, and was difficult to find.

Franken and Sean Bonner, a Los Angeles-based technology buff involved in numerous online citizen-involved projects, saw an opportunity to use technology to augment the government’s reports and to make the information widely available.

The pair found Uncorked Studios, a Portland, Ore., website development firm, which wanted to map the radiation numbers from all sources “to try to get a better picture of things on a larger scale,” Bonner said.

‘Unknowns’
The initial effort resulted in a map that revealed the dearth of information available: “We realized that there were some massive holes and that the data that was being published was not that specific,” said Bonner. “There would be one reading for an entire city. But we wouldn’t know exactly where in the city that reading was taken.”

With so many “unknowns,” the group decided to buy as many Geiger counters as possible and distribute them to people in the map’s “black holes,” Bonner said. But that wasn’t feasible because the supply of the radiation-measuring devices was limited, he  said.

So Safecast turned to a source they knew well: Hackerspaces, a loose confederation of high-tech tinkerers around the globe.

The TokyoHackerSpace had already drafted a to-do list in the disaster’s aftermath that included radiation monitoring. But with Safecast’s encouragement, the group stepped up its efforts. Members soon figured out how to build basic Geiger counters with Geiger tubes (which measure radiation) purchased through an initial fundraising campaign and modified so they could be attached to vehicles and upload data to the Internet, Christopher Wang, a specialist in sensor networks also known by his hacker nickname of “Akiba,” wrote in an email to msnbc.com.

After meeting Safecast, the hackers decided the best use of the jury-rigged devices would be to drive around taking measurements, allowing one “Geiger counter to cover a huge amount of range,” Wang wrote.

“We put together a custom circuit board that would mount on the outside of a car and had GPS (for timestamp and location data), an input for the Geiger counter, an SD card slot (for data logging), and wireless communication (to send the data inside the car and let the driver know if they are in an area with high radiation),” he said.

Other hackerspaces around the world — such as CRASH space in Los Angeles — soon enlisted in the effort and before long Safecast had the resources to launch an ambitious measuring and mapping effort.

Components of the jury-rigged Geiger counters.

While signing up volunteers, Safecast also developed a training regimen so the recruits would be able to take reliable readings with the instruments and send the data to the group.

Having average citizens involved was crucial, Franken said.

“We want to bring the radiation levels to people’s doorstep, so people can see around their house what is happening,” he said.

Safecast took its first reading on April 16. Today, it has about 50 regular volunteers who collect data from their homes or while driving, build devices or assist in other ways. Those using vehicles equipped with Geiger counters cover an area that Franken estimates to be about 620 miles long by 185 miles wide. To date, they’ve collected 251,000 data points from their drives and fixed reporting stations, and have received about 60,000 more from other sources, including people with their own Geiger counters.

Safecast publishes the data on its website and publishes it to a number of other places so the information can be used by the greatest number of people, Bonner said. It also aggregates radiation data from a number of sources, including the Japanese government.

A Safecast map shows radiation readings from northeastern Japan.

The color-coded maps that Safecast has published don’t always agree with the government’s readings. But Franken said the effort isn’t intended to suggest that the government’s information is bad. The government currently has available a website with the readings of environmental radioactivity level by prefecture.

“We really don’t want to say that the government is wrong,” he said. “And, in fact, in many cases we find that the measurements are fairly much in sync where they are comparable — we have just much more data points and locations measured.”

For example, Safecast’s mapping has revealed some radiation hotspots far from the plant, while other areas closer to it show lower levels. This is due to local weather conditions and air flow, meaning distribution of radioactive materials is not just a matter of proximity, Franken said.

“It’s not so predictable and it really pays to go and map the whole area, and literally find areas that are higher or lower as we go,” he said, noting that in some cases radiation levels can vary by street and even within a home.

“It’s kind of a heavy task because it requires a certain amount of guts to go and do it,” he said of the volunteers, noting he had recently trained a woman and her 12-year-old son in Fukushima City how to measure radiation.

Anxiety
But knowing what the levels are has helped ease some of the anxiety over the radiation exposure, Franken said.

“The measurements may or may not affect people’s decisions but in many cases we see that it more or less gives a sense of confidence that this is what it is and, ‘yeah, I’m going to stay and this is probably going to be manageable,’ or ‘no, I really don’t want to take the risk for my family, I’m going to avoid this.’”

One of the volunteers helping in the effort is Brett Waterman, a 46-year-old Australian who runs an English-language after-school program for children nearly 30 miles from the Fukushima plant, in the city of Iwaki. He has been surveying the radiation levels using a Geiger counter mounted on his car.

“There are many people who have decided that the lack of information implied that there was too much risk so they just decided to leave,” he said.

But through his work, he has learned that the radiation levels were low in the area.

“We can’t see it, but if we map it out, like we are doing street by street, we can sort of start to see it in a sense. We can get a picture of what this radiation stuff is,” he said.

His 13-year-old son is a “significant motivator” for him to take the readings. He noted that though residents don’t yet know what the long-term effects of the radiation will be, the information will be key in the future.

“In 10 years or 20 years’ time, you can’t go back to three months after the event and then find out what the data was like. But if we record it now, and then we continue to record it over the months and years to come, then from a scientific and a community point of view there is a database that can be referenced.”

Some researchers and government agencies welcome Safecast’s endeavor. Andrew Maidment, associate professor of radiology at the Hospital of the University of Pennsylvania, said the efforts were “necessary and helpful,” though he added two “cautionary notes.”

“The first is that the data are only useful, if it is clear (1) how the measurements were performed and (2) exactly where the measurements are performed,” he wrote in an email to msnbc.com. “In general, it is very easy to get erroneous measurements; consistency in following a specific protocol and lots of practice are necessary to do this right. … However, I will say that the data looks consistent since there are repeated measurements and they are spatially correlated. The second problem is that interpretation of the data is hard. Thus, the use of a color code is questionable.”

Japan’s Ministry of Education, Culture, Sports, Science and Technology did not respond to emails and a call seeking comment on the project.

The U.S. Nuclear Regulatory Commission said it was not in a position to comment on the initiative, but public affairs officer Scott Burnell noted in an email: “Speaking very generally, significant training and specialized equipment is required to provide the most accurate surveying and analysis of radioactive materials in the environment.”

Franken said Safecast encouraged dialogue with critics and supporters: “We feel that it is good to have an independent measurement available to people … I think just having more is probably better,” he said.

And Bonner said the initiative has the potential to eventually extend far beyond Japan.

“What all of this did sort of brought to light the fact that this data doesn’t exist in the quantities that it should and is not as readily available as would be helpful,” he said. “So while Japan is the focus at the moment, you know, longer term we sort of are shifting to a global outlook. There is a lot more ground to cover once everything in Japan is wrapped up.”

 

Via MSNBC/Miranda Leitsinger

Secrets of Giant Cloud Holes Revealed

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An airplane-induced hole punch cloud.

Mysterious holes in clouds made by aircraft may owe their huge sizes to a little bit of heat, a new study suggests.

For decades people have seen gargantuan holes form in high, thin clouds made of supercooled water—liquid droplets that are chilled below the freezing point but that don’t have any particles around which ice crystals can form.

In the absense of dust, these cloud droplets can turn to ice if the water gets cooled beyond -40 degrees Fahrenheit (-40 degrees Celsius). At such chilly temperatures the water molecules slow down enough to freeze spontaneously.

Researchers previously knew that plane wings, propellers, and turbines could chill supercooled water via rapid expansion of air in their wakes—making things cold enough to force the liquid to become ice. This mechanism is thought to be what creates hole-punch clouds.

As the water freezes, though, the change of state releases energy in the form of what’s called latent heat, and the role of this heat was suspect.

“I didn’t think the latent heat would be so important, but it drives the whole feedback cycle, in some cases for hours after a plane flies through,” said study co-author Gregory Thompson, an atmospheric scientist at the National Center for Atmospheric Research (NCAR).

“That’s why the holes can grow to the size of cities under the right conditions.”

Research Flights Affecting Cloud Data?

The researchers theorized that, as latent heat rises, it carries freshly frozen ice—material that would normally float down—back up into the cloud.

There, supercooled water droplets migrate to the ice crystals, feeding a chain reaction of ice formation. Eventually the ice patch becomes too dense and falls out as a flurry of snow.

To see if latent heat does lead to hole-punch clouds, the researchers ran cloud-model simulations with and without the effect.

The first simulation, which incorporated latent heat, showed that the heat suspended ice in the cloud, powered nearby evaporation, pulled surrounding vapor into the zone of crystallization, and created snow. The model ultimately formed holes in clouds that closely matched real images of the phenomenon.

The simulation without the latent-heat effect didn’t replicate what’s been documented in nature.

Thompson emphasized that this finding almost certainly doesn’t change our understanding of the role of aircraft in global climate. Nor do hole-punch clouds cause significant snowfalls around airports, he said: “It’s likely too minor for that.”

However, researchers “spend an awful lot of time flying through clouds to collect data, which we use to build models that mimic natural clouds. We may be altering that data as we measure it,” he said.

“It’s not a big effect, but it’s something to be mindful of in future atmospheric modeling.”

 

Via NatGeo

UFOs Filmed Over London — Or Not

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For extraterrestrials notoriously shy about making their presence known to Earthlings, they have been making more and more appearances in home videos over the past six months.

One of the most famous was the UFO that appeared over the Dome of the Rock, an Islamic shrine in Jerusalem, on January 28. Discovery News writer Ian O’Neill published one of the first analyses of the video (based in part on my own investigation), demonstrating that it was “almost certainly a hoax.”

A more comprehensive analysis by the Mutual UFO Network (MUFON), one of the oldest, largest, and most respected UFO investigation organizations in the world, also later concluded that it was faked.

A few months later, on April 21, another ‘alien’ home video surfaced. This one, allegedly taken in Russia, showed two young men finding an alien body on a rural, snowy farm. It, too, was soon revealed to be a hoax.

Now, right on schedule, comes yet another UFO home video, this one taken in London, England. According to a report in the Daily Mail:

“In the video, the cameraman runs towards the corner of Bolsover Street and Clipstone Street where two other men are already standing, gazing skywards, one of whom is using a mobile phone camera. As the camera is pointed upwards, over the BBC’s Yalding House, three white dots flash across the sky at great speed in a triangle formation, they are very quickly followed by two similar sized white dots. As the camera pans down again, two people on the opposite side of the road can also been seen watching events unfold above them. Then one larger, bright and more slow moving disc-shaped white object appears, circles around briefly and zips off.”

The video, one of at least two similar videos, was posted to YouTube last week and soon went viral over the Web, stirring interest and controversy among believers and skeptics alike.

Though evidence may eventually validate the video, a preliminary analysis strongly suggests that this video, like the others, is a hoax. For one thing, it’s not clear who shot the video, or even when; anonymous eyewitnesses are a red flag.

Furthermore, the UFOs (like the one that appeared in the hoaxed Jerusalem video) are very easy to fake with video-editing software, mere spots of light without structure or detail.

Adding fuel for the skeptical grist, it seems that no one else on the busy London street near the British Broadcasting Building saw the many bright glowing objects in the sky. Logic suggests that there would have been thousands of eyewitnesses, yet the cameraman captured an event that apparently no one else saw.

It’s also suspicious that though the video shows others recording the amazing event, no other photos or videos from the same angle have surfaced. Surely one of the other UFO eyewitnesses present (and seen in the video) would have come forward in the past weeks to sell their own photographs or videos to a newspaper or television station — perhaps the BBC would be interested, since it occurred above their building.

Faked UFO videos may be fun for hoaxers (or as viral marketing), but even many people firmly convinced that UFOs are real are getting tired of the hoaxes. After all, how will we know when the real UFO videos surface? No one likes to be fooled, and the best preventative is to examine all the evidence with a sense of history and a skeptical eye.

 

Via Discovery

China building an army of unmanned military drones ‘to rival the U.S.’

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America’s success with unmanned military drones has sparked a ‘global rush’ for weaponised and surveillance aircrafts, according to a new report.

Over 50 countries have purchased surveillance drones or started their own development programmes to step up military capacity in recent years.

And experts say China, having only unveiled its first drone at an air show five years ago, is on the fast track to develop unmanned aerial vehicles (UAVs) that rival U.S. technology.

Drone: The UAV WJ-600, unveiled at the Zhuhai air show in southern China in November

Drone: The UAV WJ-600, unveiled at the Zhuhai air show in southern China in November.

Experts told the Washington Post America’s ‘cheap weapons, reconnaissance abilities, and ease of use, could make drones the standard for many application.’

The recent spike, they say, is ‘because no nation is exporting weaponised drones beyond a handful of sales between the United States and its closest allies.’ And China is seeking to take a piece of the market.

Twenty five UAVs were unveiled the Zhuhai air show in southern China last November, designed and produced by China’s ASN Technology Group, China Aerospace Science and Industry Corp (CASIC), and China Aerospace Science and Technology Corp (CASC).

At the show, a crowd gathered around an armed, jet-propelled drone called the WJ-600, where a video demonstrated the aircraft locating what appears to be a U.S. aircraft carrier group flying close to Taiwan.

The drone is shown sending targeting information back to shore for a follow-up attack.

Other models were designed to fire missiles, and one, powered by a jet engine, has the capability to fly faster than the Predator and Reaper drones the U.S. has used on missions in Iraq, Afghanistan and Pakistan, according to the report.

Cheaper alternative: America's Predator B, or MQ9-Reaper drone, costs about $10.5million, compared to an F-22 fighter jet's $150million price tag

Cheaper alternative: America’s Predator B, or MQ9-Reaper drone, costs about $10.5million, compared to an F-22 fighter jet’s $150million price tag.

It was a record number for the country, which until recently, had not extended its military capacity to include UAVs.

The Wall Street Journal reported at the time that while military and aviation experts said China’s drones are presumed to be several years behind the U.S., the country is on the fast track to catching up.

Retired Lieutenant General David A. Deptula, the former deputy chief of staff for intelligence, surveillance and reconnaissance at the Air Force, told the Washington Post: ‘We are well ahead in having established systems actively in use. But the capability of other countries will do nothing but grow.’

The industry is expected to boom over the next decade; according to a 2011 market study by the Teal Group in Fairfax, global spending on drones will double to $94billion by 2021.

Much of China’s progress remains secret.

Capabilities: The UAV WJ-600 was shown locating what appears to be a U.S. aircraft carrier group flying close to Taiwan in a video demonstration at the Zhuhai air show

Capabilities: The UAV WJ-600 was shown locating what appears to be a U.S. aircraft carrier group flying close to Taiwan in a video demonstration at the Zhuhai air show.

In action: The unmanned drowne is shown sending targeting information back to shore for a follow-up attack

In action: The unmanned drowne is shown sending targeting information back to shore for a follow-up attack.

Exhibitors of the 25 UAVs did not disclose which aircrafts were fully operational.

However, the Wall Street Journal confirmed at least two propeller-powered UAVs had been deployed by the People’s Liberation Army (PLA).

Zhang Qiaoliang, a representative of the Chengdu Aircraft Design and Research Institute, which manufactures many of the most advanced military aircraft for the People’s Liberation Army, told the Washington Post: ‘The United States doesn’t export many attack drones, so we’re taking advantage of that hole in the market.’

U.S. anxiety about China’s UAVs was highlighted in a report released last November by the US-China Economic and Security Review Commission, reported the Journal.

Surveillance: The unmanned jet-propelled aerial vehicle narrows in on its target

Surveillance: The unmanned jet-propelled aerial vehicle narrows in on its target.

Mission accomplished: The aircraft carrier is targeted and blasted with missiles off the coast of Taiwan

Mission accomplished: The aircraft carrier is targeted and blasted with missiles off the coast of Taiwan.

‘The PLA Air Force has deployed several types of unmanned aerial vehicles for both reconnaissance and combat purposes,’ the report read.

It cited the Pentagon, continuing: ‘In addition, China is developing a variety of medium and high-altitude long-endurance unmanned vehicles, which when deployed will expand the PLA Air Force’s options for long-range reconnaissance and strikes.’

And other countries are following the lead; around the world UAVs are being seen as cheap and effective alternative to manned aircraft. America’s Predator B, or MQ9-Reaper, manufactured by General Atomics Aeronautical Systems, costs about $10.5million, compared to an F-22 fighter jet’s $150million price tag.

According to the Washington Post, Israel trails the U.S. as the second-largest drone manufacturer, and has flown armed models; India also announced this year it is developing armed drones that will fly at 30,000ft.

Russia has shown models of drones with weapons, but it is unknown if they are fully operational; and Pakistan has said it plans to obtain armed drones from China, according to the report.

Kenneth Anderson, a professor of law at American University who studies the legal questions surrounding the use of drones in warfare, said: ‘This is the direction all aviation is going. Everybody will wind up using this technology because it’s going to become the standard for many, many applications of what are now manned aircraft.’

 

 

Via DailyMail

Solstice Sun Storm May Spark Dazzling Northern Lights Today

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Norwegian photographer and skywatcher Terje Sorgjerd created an amazing video of the March 2011 auroras, or northern lights, which appear in this still from his project, entitiled "The Aurora.”

Norwegian photographer and skywatcher Terje Sorgjerd created an amazing video of the March 2011 auroras, or northern lights, which appear in this still from his project, entitiled “The Aurora.” CREDIT: Terje Sorgjerd

A wave of sun particles unleashed during a strong solar flare this week is arriving at Earth today (June 24) and could touch off a dazzling northern lights display, NASA officials say.

The solar storm occurred Tuesday, June 21, during Earth’s solstice, which marked the first day of summer in the Northern Hemisphere and the start of winter in the Southern Hemisphere.

The storm triggered a powerful explosion on the sun, called a coronal mass ejection, which sent a vast wave of solar particles directly at Earth at a speed of about 1.4 million mph (2.3 million kph). Those particles are now buffeting Earth’s magnetic field in interactions that could amplify the planet’s polar auroras, also known as the northern and southern lights.

“High-latitude sky watchers should be alert for auroras,” officials with NASA’s Goddard Space Center said in an update today.

Sun photo of June 21, 2011 solar storm and eruption

The SOHO sun observatory caught this view of a large solar flare and coronal mass ejection (top of sun) erupting from the sun’s surface early June, 21, 2011. CREDIT: SOHO/NASA/ESA

Supercharged auroras

Auroras occur when solar wind particles collide with atoms of oxygen and nitrogen in Earth’s upper atmosphere. The interaction excites the atoms, which then emit light (the aurora) as they return to their normal energy level.

Tuesday’s solar flare registered as a class C7.7 flare (C-class flares are the weakest types of flares), but lasted for several hours. There are three classes of solar flares. M-class solar flares are medium-strength flares, while the most intense solar storms register as X-class flares.

There is a 30 percent to 35 percent chance of a minor geomagnetic storm in Earth’s atmosphere today from this week’s storm, NASA officials said.

 

Partial Halo Coronal Mass Ejection

A broadly widening cloud of particles, observed by SOHO’s C3 coronagraph, rushed away from the Sun as a coronal mass ejection (CME) erupted over about 12 hours (June 14, 2011). Data from the Solar Dynamics Observatory shows an eruptive prominence breaking away from the Sun about where the event originated. While the originating event did not appear to be substantial, the particle cloud was pretty impressive. The bright circle with an extending horizontal line (above and left of the blue occulting disk) is a distortion caused by the brightness of planet Mercury. CREDIT: SOHO (ESA & NASA)

The active sun

This week’s solar flare was detected by the space-based Solar and Heliospheric Observatory (SOHO) operated by NASA and the European Space Agency. It came just weeks after another strong solar flare on June 7, which unleashed a massive coronal mass ejection that stunned astronomers with its intensity.

The June 7 event  kicked up a wave of plasma that rained back down on the sun over an area 75 times the width of Earth. The leading edge of the particles that erupted from the sun were traveling at about 3.5 million mph (5.7 million kph), SOHO officials have said.

Another coronal mass ejection on June 14 unleashed an eerie wave of material that formed a partial halo as it expanded into space.

The most severe solar storms, when aimed at Earth, can pose a danger to astronauts in space, satellites and even ground-based communications and power systems. This week’s solar flare, however, is not powerful enough to pose a serious risk, NASA officials said.

The sun is currently in an active period of its 11-year solar cycle. NASA and other space and weather agencies are keeping a close watch on the sun using space-based observatories, satellites and ground-based monitoring systems.

 

Via Space