| View previous topic :: View next topic |
| Author |
Message |
itaewonguy
Joined: 25 Mar 2003
|
 Posted: Fri Dec 26, 2008 6:11 pm Post subject: This is how it would look like if a big meteorite would hit |
 |
|
For best viewing, let the video play once, then play it to avoid the video stopping every 20 seconds..
http://www.proinvestortrader.com/?p=3261 |
|
| Back to top |
|
 |
T-J
Joined: 10 Oct 2008
Location: Seoul EunpyungGu Yeonsinnae
|
| Posted: Fri Dec 26, 2008 6:23 pm Post subject: |
|
|
| So...........That would be bad right? I mean that is the worst that could happen? I just want to know how bad it could get. |
|
| Back to top |
|
|
itaewonguy
Joined: 25 Mar 2003
|
| Posted: Fri Dec 26, 2008 7:05 pm Post subject: |
|
|
| T-J wrote: |
| So...........That would be bad right? I mean that is the worst that could happen? I just want to know how bad it could get. |
I think some humans will still live though..
I mean there are some mines which are like 3 km deep...
wouldnt a human be able to survive there?
or also the seed bank vault in the arctic wouldnt that be a place to survive? of course only if the impact site was not around there |
|
| Back to top |
|
|
Bigfeet
Joined: 29 May 2008
Location: Grrrrr.....
|
| Posted: Fri Dec 26, 2008 10:32 pm Post subject: |
|
|
| Nobody on Earth can survive that. Being in a deep mine would just mean that you get an instant coffin. The earthquakes would bury you. |
|
| Back to top |
|
|
sojourner1
Joined: 17 Apr 2007
Location: Where meggi swim and 2 wheeled tractors go sput put chug alugg pug pug
|
| Posted: Sat Dec 27, 2008 3:12 am Post subject: |
|
|
Video didn't play for me. It kept stopping...And I closed it. It probably wasn't meant for me to see the end of the world. 
Proinvestor? Why in the world is a finance site showing a video about us getting our world rocked by a big rock? |
|
| Back to top |
|
|
pest2
Joined: 01 Jun 2005
Location: Vancouver, Canada
|
| Posted: Sat Dec 27, 2008 3:27 am Post subject: |
|
|
yeah, really, why would anyone want to invest anything after seeing that? Especially that part at the very end, "evidence shows this has happened at least 6x before in earth's history". Geez, why put any money into anything when its imminent that its all going to get vaporized anyway?
Incidentally, while they do believe that the earth has been hit by asteroids several times in its geohistory, I dont think any scientists out there think the asteroid was 500km... I recall they believe the one that wiped out the jurassic dinosaurs was more like 10km... And the one that Bruce willis and Ben Affleck drilled a hole into and nuked a few years ago was only 50km... |
|
| Back to top |
|
|
caniff
Joined: 03 Feb 2004
Location: All over the map
|
| Posted: Sat Dec 27, 2008 3:41 am Post subject: |
|
|
| sojourner1 wrote: |
Proinvestor? Why in the world is a finance site showing a video about us getting our world rocked by a big rock? |
That was the sub-prime mortgage rock. |
|
| Back to top |
|
|
eamo
Joined: 08 Mar 2003
Location: Shepherd's Bush, 1964.
|
| Posted: Sat Dec 27, 2008 4:19 am Post subject: |
|
|
The video closes with the ominous statement that scientists believe that the Earth has been hit by similar asteroids 6 times before......maybe true.......
...........but the reason for that is that the solar system used to be a much busier place with countless asteroids flying around. For the last couple of billion years, Jupiters huge gravitational pull has taken care of most of the asteroids in the solar system. Planet destroying asteroids are very rare now..........
.........but still out there! |
|
| Back to top |
|
|
OneWayTraffic
Joined: 14 Mar 2005
|
| Posted: Sat Dec 27, 2008 5:06 am Post subject: |
|
|
| T-J wrote: |
| So...........That would be bad right? I mean that is the worst that could happen? I just want to know how bad it could get. |
http://www.lpl.arizona.edu/impacteffects/
500km, iron, 17km/s, 6000km from impact.
| Quote: |
Energy:
Energy before atmospheric entry: 7.57 x 1028 Joules = 1.81 x 1013 MegaTons TNT
The average interval between impacts of this size is longer than the Earth's age.
Such impacts could only occur during the accumulation of the Earth, between 4.5 and 4 billion years ago.
The crater opened in the water has a diameter of 2980 km = 1850 miles
Your position is inside the fireball.
The fireball appears 221 times larger than the sun
Thermal Exposure: 6.14 x 1011 Joules/m2
Duration of Irradiation: 110000 seconds
Radiant flux (relative to the sun): 5580
The major seismic shaking will arrive at approximately 1200 seconds.
Richter Scale Magnitude: 13.5 (This is greater than any earthquake in recorded history)
The ejecta will arrive approximately 1890 seconds after the impact.
Your position is beneath the continuous ejecta deposit.
Average Ejecta Thickness: 454 m = 1490 ft
The air blast will arrive at approximately 18200 seconds.
Peak Overpressure: 1.96e+07 Pa = 196 bars = 2790 psi
Max wind velocity: 3560 m/s = 7960 mph
Sound Intensity: 146 dB (Dangerously Loud)
|
No object in the solar systemis both this large and on a possible collision orbit.
The impacts in the past were roughly 20,000 times smaller. As bad as it gets would be about 10km or so across. Still bad; we're talking km high tsunamis here. Or if it hits land it'll take out a contentient, and the rest of the world would have a ten year winter.
There are plenty of other things that could do us in though. Rouge black holes, nearby supernovae or gamma ray bursts, aliens, gray goo, nuclear wars, environmental devestation etc etc... |
|
| Back to top |
|
|
OneWayTraffic
Joined: 14 Mar 2005
|
| Posted: Sat Dec 27, 2008 5:13 am Post subject: |
|
|
| T-J wrote: |
| So...........That would be bad right? I mean that is the worst that could happen? I just want to know how bad it could get. |
http://www.lpl.arizona.edu/impacteffects/
500km, iron, 17km/s, 6000km from impact.
| Quote: |
Energy:
Energy before atmospheric entry: 7.57 x 1028 Joules = 1.81 x 1013 MegaTons TNT
The average interval between impacts of this size is longer than the Earth's age.
Such impacts could only occur during the accumulation of the Earth, between 4.5 and 4 billion years ago.
The crater opened in the water has a diameter of 2980 km = 1850 miles
Your position is inside the fireball.
The fireball appears 221 times larger than the sun
Thermal Exposure: 6.14 x 1011 Joules/m2
Duration of Irradiation: 110000 seconds
Radiant flux (relative to the sun): 5580
The major seismic shaking will arrive at approximately 1200 seconds.
Richter Scale Magnitude: 13.5 (This is greater than any earthquake in recorded history)
The ejecta will arrive approximately 1890 seconds after the impact.
Your position is beneath the continuous ejecta deposit.
Average Ejecta Thickness: 454 m = 1490 ft
The air blast will arrive at approximately 18200 seconds.
Peak Overpressure: 1.96e+07 Pa = 196 bars = 2790 psi
Max wind velocity: 3560 m/s = 7960 mph
Sound Intensity: 146 dB (Dangerously Loud)
|
No object in the solar systemis both this large and on a possible collision orbit.
The impacts in the past were roughly 20,000 times smaller. As bad as it gets would be about 10km or so across. Still bad; we're talking km high tsunamis here. Or if it hits land it'll take out a contentient, and the rest of the world would have a ten year winter.
There are plenty of other things that could do us in though. Rouge black holes, nearby supernovae or gamma ray bursts, aliens, gray goo, nuclear wars, environmental devestation etc etc... |
|
| Back to top |
|
|
Koveras
Joined: 09 Oct 2008
|
| Posted: Sat Dec 27, 2008 5:13 am Post subject: |
|
|
| pest2 wrote: |
| yeah, really, why would anyone want to invest anything after seeing that? Especially that part at the very end, "evidence shows this has happened at least 6x before in earth's history". Geez, why put any money into anything when its imminent that its all going to get vaporized anyway? |
Maybe it's a comment on the hysterical fear surrounding the economy at the moment. It could be intended as a parody or as a comforting 'things could be worse' comment. |
|
| Back to top |
|
|
Koveras
Joined: 09 Oct 2008
|
| Posted: Sat Dec 27, 2008 5:15 am Post subject: |
|
|
| dp |
|
| Back to top |
|
|
joshuahirtle27
Joined: 23 Mar 2008
|
| Posted: Sat Dec 27, 2008 5:52 am Post subject: |
|
|
I'm no scientist and I don't play one on TV... but I think the world would be pretty screwed of a 500 KM in diameter asteroid were to his the Earth. I mean the atmosphere isn't 500 Km thick is it?
http://en.wikipedia.org/wiki/Earth%27s_atmosphere
| Quote: |
| If we say that the thickness of the earth's atmosphere is 31km, we are making a definition based on enclosing 99 percent of its mass. But this is an arbitrary choice. If we define the thickness as enclosing 99.9 percent of the mass, the answer is 42km. If you demand that the particle count per cubic meter be indistinguishable from the density of the solar wind in the vicinity of the earth's orbit, you have to go to something like 1000 km. Certainly it is apparent that the thickness of the atmosphere is quite small compared to the diameter of the earth |
http://www.pdas.com/atmthick.htm
So that would probably be destroyed. The tectonic effects and the tidal waves caused by such an impact would undoubtedly knock the earth out of orbit... if the asteroid didn't and would reshape the land masses on the surface of the planet so it'd be impossible to tell it was Earth. Especially since the deepest point of water on earth is estimated at 11ish Km.
Basically the world would become an egg if it wasn't destroyed completely by a 500 Km asteroid. It'd be 9/11 x 180878797978947138556868970182473407.
But I'm not a scientist. |
|
| Back to top |
|
|
T-J
Joined: 10 Oct 2008
Location: Seoul EunpyungGu Yeonsinnae
|
| Posted: Sat Dec 27, 2008 6:18 am Post subject: |
|
|
| O.K. so worst case scenario is the complete and utter destruction of every living thing on the face of the planet, got it. Good to know. |
|
| Back to top |
|
|
OneWayTraffic
Joined: 14 Mar 2005
|
| Posted: Sat Dec 27, 2008 7:08 am Post subject: |
|
|
| joshuahirtle27 wrote: |
I'm no scientist and I don't play one on TV... but I think the world would be pretty screwed of a 500 KM in diameter asteroid were to his the Earth. I mean the atmosphere isn't 500 Km thick is it?
http://en.wikipedia.org/wiki/Earth%27s_atmosphere
| Quote: |
| If we say that the thickness of the earth's atmosphere is 31km, we are making a definition based on enclosing 99 percent of its mass. But this is an arbitrary choice. If we define the thickness as enclosing 99.9 percent of the mass, the answer is 42km. If you demand that the particle count per cubic meter be indistinguishable from the density of the solar wind in the vicinity of the earth's orbit, you have to go to something like 1000 km. Certainly it is apparent that the thickness of the atmosphere is quite small compared to the diameter of the earth |
http://www.pdas.com/atmthick.htm
So that would probably be destroyed. The tectonic effects and the tidal waves caused by such an impact would undoubtedly knock the earth out of orbit... if the asteroid didn't and would reshape the land masses on the surface of the planet so it'd be impossible to tell it was Earth. Especially since the deepest point of water on earth is estimated at 11ish Km.
Basically the world would become an egg if it wasn't destroyed completely by a 500 Km asteroid. It'd be 9/11 x 180878797978947138556868970182473407.
But I'm not a scientist. |
The momentum of even a 500km object compared to that of the earth is very very small. A collision containing that much energy would practically splash apart the earth and form a new asteroid belt between Mars and Venus.
For example, the moon's mass is 7*10^22kg and earth's is 6*10^24kg. The moon is 1% of our mass, and over 3000km in diameter. A moon sized object colliding with earth would contain enough energy to break apart the planet, but not enough momentum to alter our orbit by more than a 1% or so.
The atmosphere protects against objects up to the size of a few meters or a little more. It's total protection against the very common and small objects up to a football or so, as these will completely vaporize. Larger objects may break up in mid air causing an airburst effect. If lucky, this fireball will be too high up to cause as much damage as a ground/water impact.
I'm not scientist, but I am a science major. |
|
| Back to top |
|
|
|
FAQ
Search
Memberlist
Usergroups
Register
Profile
Log in to check your private messages
Log in
