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Showing posts with label Space Watch. Show all posts
Showing posts with label Space Watch. Show all posts
Friday, February 15, 2013
Did Asteroid 2012 DA 14 Hit a Satellite?
Or Did It's Gravity Dis-orbit One of Several Meteorites? More Than 1,000 People Injured in Russia - VIDEO
Did Earth Gravity cause Asteroid to Swerve,Hit Satellites?
February 15, 2013 – SPACE - An asteroid which is to hurtle close to the Earth tomorrow may experience a seismic jolt as it passes through our planet's gravitational field, scientists suggest. The 45m asteroid, named 2012 DA14, will fly by at 7.8 km/s at a distance of just 27,000 km from Earth. It will be visible in New Zealand skies from about 2.30am (although not with a naked eye), but will make its closest approach to the Earth about 8.25am. It is forecast to be the closest recorded asteroid, passing well inside the geostationary ring, where many communication satellites are located.While Earth has experienced many tremors from asteroids striking our planet, new research by Richard Binzel, a professor of planetary science at the Massachusettes Institute of Technology, suggests many near-Earth asteroids experience a seismic jolt when they pass too close to our planet's gravitational field. “We are going to be looking closely for evidence of seismic activity on 2014 DA14 as it passes by,” Binzel said. “This is the first case of an object coming close enough to experience quakes and where we have enough notice to plan observations.” The idea of asteroid-quakes came to Binzel when he was pondering a mystery about “space-weathered” asteroids. “As asteroids move through space, they slowly turn dark-red. This phenomenon, called ‘space weathering,’ is caused by long exposure to cosmic rays and solar radiation. For decades, however, we have known about a handful of small asteroids that looked light and fresh; they were not space weathered.”Calculating the orbits of the non-weathered asteroids, Binzel and colleagues discovered they had all had close encounters with Earth in the past million years. “We believe they were ‘shaken up’ by their encounters with Earth,” he said. “Gravitational forces during the flybys can stretch, rattle, and torque these asteroids, causing dark, space-weathered material on the surface to be overturned, revealing the fresh stuff underneath.” Unlike on Earth, there is no Richter scale for asteroids. Instead, Binzel measures the force of the quakes in units of gravitational acceleration, or gees. “These asteroids experience [seismic activity] in the milli- to micro-g range,” Binzel said. “That might not sound like much, but remember these are small bodies. Gravity is not very strong, so just a little shaking or stretching goes a long way.”Binzel believed an asteroid floating beside an asteroid experiencing such a quake would see the surface “slowly sway or rock by a few centimeters. Other things to look for would be puffs of asteroid-dust rising from the surface and gentle avalanches on the steepest slopes of craters.” MIT post-doctorate Nick Moskovitz, who works with Binzel, is coordinating observations with worldwide observatories, including New Zealand’s Mt John Observatory, to determine the colour spin, shape, and reflectivity of 2012 DA14 as it passes by. Changes in any of these quantities might be a sign of a quake. “We stand to learn a lot from the observations,” Binzel said. –NZ Herald
The Extinction Protocol
| February 15, 2013 at 3:50 am | Categories: Earth Changes
, Earth Watch
, Fireballs, Meteor or Asteroid
,Seismic tremors
, Space Watch
, Time - Event Acceleration
| URL: http://wp.me/p1eYXc-7Yh
|
Survive Anything - Disasters - Economy Collapse - Mobs, Etc. PROTECT YOUR FAMILY!
37 Food Items that will be SOLD OUT after Crisis:
NASA knows some things. 2012 Survival Guide
Ping your blogAnd Chomp it www.Hypersmash.com
Saturday, November 17, 2012
Signs in the sun, moon, and stars and upon Earth, a distress of nations with perplexity: massive explosion seen on the sun
New post on The Extinction Protocol: 2012 and beyond |  |
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Source:
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Survive Anything - Disasters - Economy Collapse - Mobs, Etc. PROTECT YOUR FAMILY!
37 Food Items that will be SOLD OUT after Crisis:
NASA knows some things. 2012 Survival Guide
Ping your blogAnd Chomp it www.Hypersmash.com
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