muncha Posted February 15, 2013 Posted February 15, 2013 (edited) Today registered a decline metiarita! Flash seen for 300 miles! Does not work mobile. There are wounded from cuts of broken glass! The evening will fly folder, NASA will be broadcast live! Here is video: Edited February 15, 2013 by muncha 1
michel123456 Posted February 15, 2013 Posted February 15, 2013 It's all over the news http://www.smh.com.au/world/meteor-shower-over-russia-sees-meteorites-hit-earth-20130215-2ei2j.html
imatfaal Posted February 15, 2013 Posted February 15, 2013 400 injured according to beeb, mostly flying glass - I think it had broken up before it impacted, and the area is sparsely populated where most of the debris fell. Although there are pictures of residential tower blocks with blown out windows. Lucky no one was killed.
Moontanman Posted February 15, 2013 Posted February 15, 2013 From the video we are lucky they didn't assume it was a nuclear attack, can you image what would have happened at the height of the cold war if this has happened with all those nukes on high alert? ABC news video that shows the flash.. http://www.youtube.com/watch?v=bH136SW4q78
michel123456 Posted February 15, 2013 Posted February 15, 2013 Your video has become private. As it seems some will make money from this event while others will spent some time at the hospital.
Moontanman Posted February 15, 2013 Posted February 15, 2013 Your video has become private. As it seems some will make money from this event while others will spent some time at the hospital. that is strange the video has been taken down...
michel123456 Posted February 15, 2013 Posted February 15, 2013 Wiki page already! http://en.wikipedia.org/wiki/2013_Russian_meteor_event
akh Posted February 15, 2013 Posted February 15, 2013 (edited) Wondering how quickly this event will get political. The far righty are always accusing the scientific community of sensationalism. They want to defund Nasa because they have provided evidence which supports agw which is inconvenient to their political dogma. So in a very short period of time two objects have provided ample evidence as to why agencies like NASA should exist, and why, if anything, they deserve more research dollars. So while the political right like to mock scientific community for having "the sky is falling" attitude when it comes to issues like agw, we have a clear case for why scientific research is important for the future of humanity. But to our advantage, this time we can all agree that the sky is indeed falling. Edited February 15, 2013 by akh 1
michel123456 Posted February 15, 2013 Posted February 15, 2013 (edited) The meteorite choosed to sink into the "most polluted lake in the world" (following some blogs). Food for conspiration theories. Edited February 15, 2013 by michel123456
Amaton Posted February 15, 2013 Posted February 15, 2013 Yep, it's big news as of now. Don't have cable this week, but I can tell since it's #1 on Google and Yahoo! News. Here's an article: Meteorite Hits Russia, Causing Panic Interesting how this paper says it injured around a thousand people, while the previous articles only balled about 400. Either more detailed reports of injuries are coming out or some news sources just want the attention.
pwagen Posted February 15, 2013 Posted February 15, 2013 (edited) Interesting how this paper says it injured around a thousand people, while the previous articles only balled about 400. Either more detailed reports of injuries are coming out or some news sources just want the attention. Injury counts seems to have gone up. The same sources that reported on 400 injured earlier today, now talk about around 1,000. Though, of course, I'd guess it's partly media sensationalism. Edit: Cracked has gathered 5 of the videos from the event. I especially like the last one. No flashy stuff, but the aftermath is really cool. http://www.cracked.com/quick-fixes/5-meteor-videos-that-prove-russians-dont-give-f2340k/ Edited February 15, 2013 by pwagen
Moontanman Posted February 15, 2013 Posted February 15, 2013 Russian is official claiming the meteorite was actually a US weapons test... http://www.washingtonpost.com/blogs/worldviews/wp/2013/02/15/russian-parliament-member-says-meteor-was-actually-a-u-s-weapons-test/
esbo Posted February 16, 2013 Posted February 16, 2013 (edited) Interesting we get two meteors so close together both rare events. I see the scientists say the events are unrelated, although one Russia one said they could be related. Occums Razor (simplest ttheory) says they are related. The reason the scientist suggested they were unrelated is one hit on the other side from which the bigger one came from. However they didn't pick up the small one untill it was seen visualy and I have some calculation which show it could easliiy have came from the same side and complete a near half orbit before impacting. You certainly could not rule it out anyway, the initilal trajectory matter a bit but we will never really know that as it was not picked up untill late. So seems to me the are part of the same 'event', and it seems to me there could well be more smaller meterors in the 'series' indeed possibly bigger ones further away!! Edited February 16, 2013 by esbo
Krupin Posted February 16, 2013 Posted February 16, 2013 Chelyabinsk - a big city with a population of over one million. First, people saw the flash and went to the window. After a few minutes of the blast knocked the glass. Therefore, many were cut broken windows. 1
michel123456 Posted February 16, 2013 Posted February 16, 2013 Chelyabinsk - a big city with a population of over one million. First, people saw the flash and went to the window. After a few minutes of the blast knocked the glass. Therefore, many were cut broken windows.Yes. curiosity killed the cat. it is noticeable on the videos that the blast smashed the windows, not especially debris from the asteroid.
guitargarrib Posted February 16, 2013 Posted February 16, 2013 Is this Dark Matter? The meteor that hit Russia yesterday appeared to explode sending out a massive arc of white light. It appeared to be lighting up the air around it progressively and in increasing phases until the air around it was completely white. Conversely, the colour of buildings appear almost unaltered. This suggests that extreme energy such as that witnessed yesterday from the meteor hitting our atmosphere could turn dark matter momentarily luminous or cause dark matter to react in a manner to make it visible. It certainly seemed that "everything" within this arc was lit up. Could this mean that dark matter is free moving (water, air) rather than solid objects and if so that Dark matter plays a part in the density of the subject, so more dark matter - air, some - liquids, little - stone etc. I guess I am as far away from the truth as D14 from Cornwall but its worth a punt.. G
michel123456 Posted February 16, 2013 Posted February 16, 2013 (edited) Why did an explosion (the blast) occur before the asteroid hit the ground? ------------------ i remember in the army in the 80's we were given instructions for protection against blasts after (nuclear) flash. Similar to "duck and cover". Immediately after a flash you had to lie down to the floor in the direction the flash was coming, head first, legs stretched, arms over your head (IIRC), in a position that opposed less possible resistance to the blast. Also because you have a few seconds between the flash and the blast. Edited February 16, 2013 by michel123456
Phi for All Posted February 16, 2013 Posted February 16, 2013 Why did an explosion (the blast) occur before the asteroid hit the ground? Meteors compress the air in front of them and that generates a great deal of heat. I forget what they call it, but this can cause them to burst before they hit the ground.
michel123456 Posted February 16, 2013 Posted February 16, 2013 Meteors compress the air in front of them and that generates a great deal of heat. I forget what they call it, but this can cause them to burst before they hit the ground. the metorite explodes due to overheating? Why not smelting? Or is it something with the compressed gases in the atmosphere?
x(x-y) Posted February 17, 2013 Posted February 17, 2013 (edited) Meteors compress the air in front of them and that generates a great deal of heat. I forget what they call it, but this can cause them to burst before they hit the ground. It is called a bolide, but as far as I'm aware this event was not a bolide - the meteorite did not explode during descent, rather it fragmented and vapourised (hence the vapour trails) with only a few fragments reaching the ground. The "explosion" itself was the shockwave caused by the meteorite breaking the sound barrier as it entered the Earth's atmosphere; note that the shockwave was also due to the loss in kinetic energy of the rock as it entered our atmosphere, it was moving at some 8km/s before entering and slowed right down upon entry, that energy loss has to go somewhere. NB - An example of a Bolide event would the Tunguska Event in 1908, which was several orders of magnitude more powerful than this event. Also, note that the term "bolide" has many definitions - astronomers tend to use it to describe a magnitude -14 or greater event which explodes mid-air. Edited February 17, 2013 by x(x-y)
michel123456 Posted February 17, 2013 Posted February 17, 2013 (edited) It is called a bolide, but as far as I'm aware this event was not a bolide - the meteorite did not explode during descent, rather it fragmented and vapourised (hence the vapour trails) with only a few fragments reaching the ground. The "explosion" itself was the shockwave caused by the meteorite breaking the sound barrier as it entered the Earth's atmosphere; note that the shockwave was also due to the loss in kinetic energy of the rock as it entered our atmosphere, it was moving at some 8km/s before entering and slowed right down upon entry, that energy loss has to go somewhere. NB - An example of a Bolide event would the Tunguska Event in 1908, which was several orders of magnitude more powerful than this event. Also, note that the term "bolide" has many definitions - astronomers tend to use it to describe a magnitude -14 or greater event which explodes mid-air. on the videos there is clearly a 'flash" event suggesting an explosion, not only a schockwave from the meteorite breaking the sound barrier. At 0:19 in the OP video An air burst as mentioned in the wiki article. Why? What is that causes an air burst in an asteroid? On 15 February 2013, a small asteroid entered Earth's atmosphere over Russia at approximately 09:25 YEKT (03:25 UTC), becoming a fireball.[2][3][4] Moving at a speed of 15 km/s to 18 km/s (34000 mph to 40000 mph),[5][6][7] it passed over the southern Ural region and exploded over Chelyabinsk Oblast.[n 1] The object's air burst occurred at an altitude between 15 and 25 km (9.3 and 16 mi) above the ground.[9][2] The energy released was equivalent to nearly 500 kilotons of TNT,[10][1][2] which would make it 20–30 times more powerful than the atomic bombs detonated at Hiroshima and Nagasaki.[1][2][11][10]Being significantly smaller than objects that are tracked through current efforts by space object scientists, the meteor was not detected before atmospheric entry.[12] Edited February 17, 2013 by michel123456
pwagen Posted February 17, 2013 Posted February 17, 2013 What is that causes an air burst in an asteroid? Think of a gas canister in a fire. Whatever is inside it is heated up more and more until the canister itself can't withstand the pressure, then it explodes. I'd imagine it's the same case with a meteorite. Whatever is inside of it is heated up by its descent through the atmosphere, then internal pressure cracks it open.
michel123456 Posted February 17, 2013 Posted February 17, 2013 Think of a gas canister in a fire. Whatever is inside it is heated up more and more until the canister itself can't withstand the pressure, then it explodes. I'd imagine it's the same case with a meteorite. Whatever is inside of it is heated up by its descent through the atmosphere, then internal pressure cracks it open. But heat comes from the outside and the meteorite is supposed to be solid rock. It is not full of kerozene.
pwagen Posted February 17, 2013 Posted February 17, 2013 But heat comes from the outside and the meteorite is supposed to be solid rock. It is not full of kerozene. Even if they're mostly metal or rock, there is still a chance of pockets of ice or frozen gas within. The heat from friction builds up enough pressure to cause an explosion.
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