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Meteorite crash in Russia

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Re: Meteorite crash in Russia

#191

Earlier quoted context omitted.

In the comments "Next Russia Today probably will write Putin himself shot the meteorite from his hunters gun."

While riding a bear http://guyism.com/wp-content/uploads/2013/02/putin-bear.jpg

Relevant:

http://cs6081.userapi.com/v6081385/508f/hhp8_8Hlg7g.jpg

(Source: http://zyalt.livejournal.com/722930.html )

Re: Meteorite crash in Russia

#192

Earlier quoted context omitted.

I don't understand why some of the people are still listening to the radio and so uninterested.

The number 1 most important factor in dealing with emergencies is recognizing that an emergency is happening in the first place. It's easy to get mislead by movies and tv and the way things happen and the way people react. In reality things don't work that way. It can sometimes be difficult to tell when an emergency is happening, and a lot of people won't pay enough attention. How often do people ignore fire alarms,…

The bystander effect. My pet theory is that most people are followers rather than leaders, but I'd love to see some researched opinion on this.

Re: Meteorite crash in Russia

#193
When you look at a commercial jet flying at 10k meters from the ground, it takes a long while until it disappears from the skyline. This meteorite crossed the entire skyline in a matter of seconds. That's just mind bogging. Also, the sound blast arrived waaay after the main explosion, and since it's been traveling at ~360 meters per second. I wonder if anyone here could estimate the speed of that rock in the atmosphere.

Re: Meteorite crash in Russia

#194

That is an amazing event. I am not sure I buy the meteorite story. Has anyone checked on 2012-DA14 [1] the asteroid that was supposed to cross between the earth and geosync orbit this evening? One conjecture would be it knocked something out of orbit. The air defense stuff is somewhat hard to believe, we don't intercept de-orbiting space junk, much less less hypersonic meteors. Further every missile interceptor that…

This guy https://twitter.com/BadAstronomer/status/302313851511271426 seems pretty sure it's unrelated to 2012DA14. And he has 230K followers on Twitter, so ... shrug

You can get 230k followers on the cheap these days. Phil Plait is credible, though.

Re: Meteorite crash in Russia

#195

That is an amazing event. I am not sure I buy the meteorite story. Has anyone checked on 2012-DA14 [1] the asteroid that was supposed to cross between the earth and geosync orbit this evening? One conjecture would be it knocked something out of orbit. The air defense stuff is somewhat hard to believe, we don't intercept de-orbiting space junk, much less less hypersonic meteors. Further every missile interceptor that…

This guy https://twitter.com/BadAstronomer/status/302313851511271426 seems pretty sure it's unrelated to 2012DA14. And he has 230K followers on Twitter, so ... shrug

I think it's a really bad idea to start using Twitter followers as a credential. That being said Phil Plait is a legit astronomer and has a Ph.D in Astronomy and worked on the Hubble Telescope and has done a TED talk on defending Earth from asteroids. With real credentials like those you're doing a disservice to first mention the number of Twitter followers to validate his expertise.

Re: Meteorite crash in Russia

#196
post #10

It takes events like this to highlight how awesome it is to have a large number of people constantly recording video. Integrated dashcams with a circular buffer should become ubiquitous standard equipment IMO. 1080p of first clip available on YouTube: https://www.youtube.com/watch?v=7c-0iwBEswE

Does everyone in Russia have a dashcam or something? It seems like every other video I see on YouTube was recorded on one, and yet I don't know of anyone in Japan or the US with one installed (parking cams don't count). It's a great idea– I would probably get one if I still had a car, but it's amazing to me just how prevalent they seem in Russia. (Elsewhere too? I don't know. I'd love it if someone could enlighten me…

Explanation by a russian redditor: http://www.reddit.com/r/IAmA/comments/17ds8h/iama_russian_dr...

Re: Meteorite crash in Russia

#197

Here's a collection of insane videos of the event, some with the enormous sonic boom: http://www.youtube.com/watch?v=XIAm5hq8WWc http://www.youtube.com/watch?v=b0cRHsApzt8 http://www.youtube.com/watch?v=Np_mpGYSBSA Can anyone translate what they are saying in the first one? You can get a good idea of the new videos being posted using YouTube's "last hour" filter: http://www.youtube.com/results?search_query=%D0%BC%D0%…

Those sounds are absolutely chilling.

Re: Meteorite crash in Russia

#198

Side issue: Anyone know what a Google Driverless car would make of a fireball heading towards it out of the sky? Is there a default action in case of uncertainty? Brake? Swerve? Any of those by these drivers could have been worse than the "yebat"

This would be a case where the driver would be expected to take over.

Re: Meteorite crash in Russia

#199
I was wondering why there are so many dashboard cams. Answer: from the NYTimes

"Some of the numerous videos that quickly emerged of the incident highlighted a distinctly Russian phenomenon: the dashboard cam. As Business Insider recently pointed out, they are commonplace in Russia partly because of the dangerous driving conditions that lead to so many accidents, and with an unreliable police force such cameras can provide valuable evidence following a crash."

http://thelede.blogs.nytimes.com/2013/02/15/video-captures-f...

Re: Meteorite crash in Russia

#200
post #147

Earlier quoted context omitted.

>It is within the performance envelope of those types of systems. Is this true? Reentry speed of an ICBM is something like 5 km/s. Entry speed of a meteor is a minimum of 11 km/s, and more like 25 km/s if this object wasn't in an Earth-like orbit to begin with. Missile interceptors travel much slower than either, and they have a tough time hitting ICBMs from what I understand.

Also, Russian missile interceptors are outfitted with nuclear warheads, to address the precision problem. And virtually all Russian missile defense is concentrated around Moscow. So it's safe to conclude the military was not involved here.

The meteor must have exploded 20 miles high, wouldn't a nuclear warhead cause an EMP at that altitude? Or would a lower yield lack that?
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