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Russia meteor virtually impossible to see coming | Atom & Cosmos | Science News - 0 views

www.sciencenews.org/...ually_impossible_to_see_coming scibyte82 RussianMeteor
shared by Mars Base on 17 Feb 13 - No Cached
  • Scientists have begun piecing together the characteristics of the meteor that exploded over Russia on the morning of February 15, using data from seismic instruments that track earthquakes and microphones designed to detect sonic booms from nuclear explosions
  • The explosion had the equivalent of up to 500,000 tons of TNT
  • about 30 times the energy output of the Hiroshima atomic bomb
  • ...1 more annotation...
  • only 5 percent of the energy of the famous 1908 Tunguska meteor that downed trees over a 2,000-square-kilometer area in Siberia
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Airburst Explained: NASA Addresses the Russian Meteor Explosion - 0 views

www.universetoday.com/...s-the-russian-meteor-explosion scibyte82 RussianMeteor
shared by Mars Base on 16 Feb 13 - No Cached
  • traveled through the atmosphere for about 30 seconds before breaking apart and producing violent airburst ‘explosion’ about 20-14 km (12-15 miles) above Earth’s surface
  • producing an energy shockwave equivalent to a 300 kilotons explosion
  • The Russian meteor is the largest reported since 1908, when a meteor hit Tunguska, Siberia
  • ...3 more annotations...
  • Tunguska event was caused by an object about the size of 2012 DA14
  • The meteor, which was about one-third the diameter of asteroid 2012 DA14, became brighter than the Sun
  • Its trail was visible for about 30 seconds, so it was a grazing impact through the atmosphere
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Russian Meteor Blast Bigger Than Thought, NASA Says | Space.com - 0 views

www.space.com/-meteor-blast-bigger-size.html scibyte82 RussianMeteor
shared by Mars Base on 17 Feb 13 - No Cached
  • 16 February 2013
  • NASA revised its estimates on the size and power of the devastating meteor explosion
  • now thought to be slightly larger — about 55 feet (17 m) wide — with the power of the blast estimate of about 500 kilotons, 30 kilotons higher than before
  • ...6 more annotations...
  • also substantially more massive than thought
  • Initial estimated pegged the space rock's mass at about 7,000 tons
  • the meteor weighed about 10,000 tons and was travelling 40,000 mph (64,373 km/h) when it exploded
  • new estimates were generated using new data that had been collected by five additional infrasound stations located around the world
  • the first recording of the event being in Alaska, over 6,500 kilometers away
  • infrasound stations detect low-frequency sound waves that accompany exploding meteors, known as bolides
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Meteor strike in Russia hurts almost 1,000 (w/ Video) - 0 views

phys.org/...ower-panic-central-russia.html scibyte82 RussianMeteor
shared by Mars Base on 16 Feb 13 - No Cached
  • The fall of such a large meteor estimated as weighing dozens of tonnes was extremely rare
  • 950 people were injured, with two-thirds of the injuries light wounds from glass shards and other materials blown out by the shockwave
  • the ministry saying almost 300 buildings were damaged including schools, hospitals, a zinc factory and even an ice hockey stadium
  • ...13 more annotations...
  • At 9:20 am (0320 GMT), an object was observed above Chelyabinsk which flew by at great speed and left a trail behind. Within two minutes there were two bangs," regional emergencies official Yuri Burenko
  • office of the local governor said that a meteorite had fallen into a lake outside the town of Chebarkul in the Chelyabinsk region and television images pointed to a six-metre (20-foot) hole in the frozen lake's ice
  • it has yet to be finally confirmed if meteorite fragments made contact with the Earth and there were no reports that any locals had been hurt directly by a falling piece of meteorite
  • the shock wave blew out windows amid temperatures as low as minus 18 degrees Celsius (zero degrees Fahrenheit
  • Russian Academy of Sciences
  • estimated the body to be several metres long and weighing several dozen tonnes
  • The meteor explosion appears to be one of the most stunning cosmic events above Russia since the 1908 Tunguska Event
  • With the meteor quickly a leading trend on Twitter
  • locals posted amateur footage on YouTube showing men swearing in surprise and fright, and others grinding their cars to a halt
  • virtually impossible" to spot objects such as the meteor that struck Russia, which he called a "tiny asteroid", ahead of time against a daytime sky
  • The Chelyabinsk region is Russia's industrial heartland
  • huge facilities that include a nuclear power plant and the massive Mayak atomic waste storage and treatment centre
  • radiation levels in the region also did not change and that 20,000 rescue workers had been dispatched to help the injured and locate those requiring help
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Asteroid 2012 DA14 to Safely Pass Earth NASA ANIMATION VIDEO - YouTube - 0 views

www.youtube.com/watch scibyte82 NearEarthObject
shared by Mars Base on 16 Feb 13 - No Cached
  • Asteroid 2012 DA14 to Safely Pass Earth NASA ANIMATION VIDEO
  • e the closest known approach to Earth for an object its size.
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45 meter Asteroid to Skirt Very Near Earth on Feb 15 - 0 views

www.universetoday.com/...kirt-very-near-earth-on-feb-15 scibyte82 NearEarthObject
shared by Mars Base on 13 Feb 13 - No Cached
  • Friday (Feb. 15)
  • a space rock roughly half a football field wide skirts very close by Earth
  • well inside the
  • ...11 more annotations...
  • expensive communications and weather satellites that ring around us in geosynchronous orbit
  • no possibility of an Earth impact
  • altitude of 27,700 kilometers (17,200 miles). That is some 8000 km (5000 miles) inside the ring of geosynchronous satellites
  • if an asteroid the size of 2012 DA14 fell to Earth, the impact effect would be similar to the 1908 Tunguska event in Siberia
  • the K-T event that caused the mass extinction of the dinosaurs some 65 million years ago was caused by an asteroid about 10 km (6 mi) in diameter
  • no danger to the ISS crew and apparently they won’t have any chance to observe it.
  • ISS is not positioned right for observations
  • “No NASA space-based assets will be making measurements
  • asteroid is moving to fast
  • radar astronomers do plan to take images around eight hours after the flyby using the Goldstone antenna in California’s Mojave Desert
  • 2012 DA 14
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Russian Meteor Not Related to Asteroid Flyby, NASA Confirms - 0 views

www.universetoday.com/...o-asteroid-flyby-nasa-confirms scibyte82 RussianMeteor NearEarthObject
shared by Mars Base on 16 Feb 13 - No Cached
  • February 15, 2013
  • The meteor that streaked over the skies of Russia
  • not related to the asteroid that
  • ...2 more annotations...
  • whiz past Earth later today, (Feb.15
  • the trajectory of the Russian meteorite was significantly different than the trajectory of the asteroid 2012 DA14, making it a completely unrelated object
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After Higgs Boson, scientists prepare for next quantum leap - 0 views

phys.org/...-boson-scientists-quantum.html scibyte82 HiggsBoson
shared by Mars Base on 16 Feb 13 - No Cached
  • Seven months after its scientists made a landmark discovery that may explain the mysteries of mass, Europe's top physics lab will take a break from smashing invisible particles to recharge for the next leap
  • From Thursday, the cutting-edge facilities at the European Organisation for Nuclear Research (CERN) will begin winding down, then go offline on Saturday for an 18-month upgrade
  • scientists said they were 99.9 percent certain they had found the elusive Higgs Boson,
  • ...7 more annotations...
  • The upgrade will boost the LHC's energy capacity, essential for CERN to confirm definitively that its boson is the Higgs, and allow it to probe new dimensions such as supersymmetry and dark matter
  • We need to increase the energy to look at more physics.
  • Over the past three years, CERN has slammed protons together more than six million billion times
  • espite the shutdown, CERN's researchers won't be taking a breather, as they must trawl through a vast mound of data
  • think a year from now, we'll have more information on the data accumulated over the past three years
  • Last year, the LHC achieved a collision energy level of eight teraelectron volts, an energy measure used in particle physics—up from seven in 2011
  • After it comes back online in 2015, the goal is to take that level to 13 or even 14, with the LHC expected to run for three or four years before another shutdown.
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Newsflash: Lightning May Cause Headaches - News Watch - 0 views

newswatch.nationalgeographic.com/...-lightning-may-cause-headaches scibyte82 lightning
shared by Mars Base on 13 Feb 13 - No Cached
  • The study found a shocking 31 percent increase of the risk of headache and a 28 percent increased risk of migraine for chronic headache sufferers on days that lightning struck within 25 miles (40 kilometers) of their homes
  • Furthermore, new-onset headaches and migraines increased by 24 percent and 23 percent, respectively
  • new study is the first to show a correlation between lightning and associated weather phenomena and the squalls in our heads
  • ...6 more annotations...
  • results “suggest that lightning has its own unique effect on headache
  • how exactly lightning might trigger headaches
  • there are a number of possible explanations
  • Electromagnetic waves emitted from lightning could trigger headaches
  • lightning produces increases in air pollutants like ozone, and can cause release of fungal spores that might lead to migraine
  • while the study sheds light on the apparent link between lightning and headaches, “the exact mechanisms through which lightning and/or its associated meteorologic factors trigger headache are unknown
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NASA - Asteroid 2012 DA14 - Earth Flyby Reality Check - 0 views

www.nasa.gov/...asteroidflyby.html scibyte82 meteor
shared by Mars Base on 15 Feb 13 - No Cached
  • NASA statement on Russia meteor
  • the trajectory of the Russia meteor was significantly different than the trajectory of the asteroid 2012 DA14, making it a completely unrelated object
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