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Blast Radius
Topic Started: Dec 25 2008, 03:01 PM (450 Views)
fireh8er
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I'm Captain Kirk!
Dwayne
Dec 28 2008, 12:45 PM
I think this video is appropriate for this thread.
Posted Image

Game over, man!
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Dwayne
Profanity deleted by Hoss
^^^ Ain't that the truth.

I think the one single best thing the UN could EVER do is get nations moving toward the cooperative effort necessary to make an early warning and deflection system work.
Edited by Dwayne, Dec 28 2008, 11:09 PM.
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STC
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Commodore
^^^

A good call :thmup:
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Hawku
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El Cappuccino
That asteroid was moving pretty slow. And would the impact create a perfect crown like that (like a rock hitting the water)? Wouldn't most of that get stuck in orbit or something? Just wondering. I ain't no scientiferific science guy.
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Dwayne
Profanity deleted by Hoss
^^^ That video is a slow motion view, so the speed and such are not relevant.
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Franko
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Shower Moderator




A lot of people don't seem to realize that the asteroid doesn't have to be very large. Even a rock merely around a kilometer in diameter (or half a mile) would mean "game over".







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STC
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Commodore
^^^

I'm not sure that size would destroy all human life, though it would be a catastrophic event. Once you start going 1 mile + though you're potentially in the realms of extinction level events I think.

Also, trajectory of the impact is an important variable.
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Hawku
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El Cappuccino
I wonder if an impact at a high speed would alter the Earth's rotation (the spin) too.
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Sgt. Jaggs
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How about a Voyager Movie
Franko
Dec 29 2008, 09:10 PM



A lot of people don't seem to realize that the asteroid doesn't have to be very large. Even a rock merely around a kilometer in diameter (or half a mile) would mean "game over".







So its all about mass? What about composition? Would a less dense body vaporize more of its mass on entry and thusly and stuff not be what we feared it might be?
As we watch it approach we can observe size but who knows what that puppy really is?
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fireh8er
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I'm Captain Kirk!
Franko
Dec 29 2008, 09:10 PM



A lot of people don't seem to realize that the asteroid doesn't have to be very large. Even a rock merely around a kilometer in diameter (or half a mile) would mean "game over".







People really don't have a clue about asteroids.

There are several documentaries out now that go into great detail about such an event.

Bad Times. :no:
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STC
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Commodore
Sgt. Jaggs
Dec 29 2008, 11:04 PM
Franko
Dec 29 2008, 09:10 PM



A lot of people don't seem to realize that the asteroid doesn't have to be very large. Even a rock merely around a kilometer in diameter (or half a mile) would mean "game over".







So its all about mass? What about composition? Would a less dense body vaporize more of its mass on entry and thusly and stuff not be what we feared it might be?
As we watch it approach we can observe size but who knows what that puppy really is?
Composition is very significant :yes:

A body may have a large mass, but be composed of lots of bits that have accumulated and grafted on over time. Such a body would be more likely to break up as it entered the atmosphere. I think a lot of comets would be like this.

In contrast, a body that was, for want of a better word, less grainy, perhaps with a high component of iron ore, would have a lower burn-up rate as it entered the atmosphere. Its concentrated and total mass would be higher on impact and hence pose more of a threat.
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STC
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Commodore
I watched a very good BBC documentary on this subject some years back, I've not been able as yet to find it online.

However, as we're on the topic of Doomsday ;) you might enjoy this, from the BBC's "Horizon" series (a long-running science documentary). This particular one is a dramatisation of a number of catastrophes of doomsday proportions, all happening on the same day. Obviously, the idea is to give the viewer a general overview (they've done all these in more depth and more formally in previous shows). Its in 6 parts, I'm just up to part 2 now but I've copied all the links, seems quite enjoyable. :)

Edit: I watched the whole lot - good viewing :thmup:

END DAY - pt 1
END DAY - pt 2
END DAY - pt 3
END DAY - pt 4
END DAY - pt 5
END DAY - pt 6
Edited by STC, Dec 31 2008, 08:09 AM.
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rowskid86
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Suck my Spock
To me the virus or supervalcano are the scariest.

Just watched all 6
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STC
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Commodore
This is the original documentary on the Cumbre Vieja about the mega-tsunami threat

Mega Tsunami: Wave of Destruction

Its on a playlist so, when the first clip is over, it will automatically go to the next clip. The programme is about 45-50 mins long.

Edited by STC, Dec 31 2008, 08:28 AM.
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