Originally posted by chiron613
Fascinating stuff. I wonder where it went - I mean, if it was big enough to make all that light, was it big enough to hit the earth?
I don't think this was a nuke that got shot down.
Usually in cases like this, no. Not so much a case of it not being big enough (although obviously size can matter allot when you start getting really
big objects), but that objects like these are not very dense, and they are often weak/fractured, so almost as soon as they slam into our atmosphere at
high speed, they break up/explode.
Kinetic energy (mainly from its relative velocity) is converted into a blinding flash of light basically, in a massive release of energy similar in
size to a small nuclear blast.
Our atmosphere becomes very dense somewhere around 40-50km in height, and most asteroidal material is slowed down rapidly by this altitude. Anything
surviving will stop emitting light and fall to the ground unseen a few minutes later, and probably traveling a couple of hundred mph at best.
This one was perhaps 1-5 meters across, and not that uncommon. In most cases they end up as dust , and pebble sized pieces scattered on the ground.
See
this thread about a similar event at the start of the year where meteorites were
recovered.
I agree, there's no evidence to suggest a nuke. It looks "just" like any other bright meteor. If it was a nuclear missile being intercepted it
would likely be no where near as bright, since you can't set off a nuke by accident.
The person suggesting a nuke probably does not realize that a 2 m rock traveling at around 25 km/s can easily have the KE equivelent to that of a
nuclear warhead. Edit to add: In this case I suspect the object may have been up to 2x that speed. Usually they are not quite that fast.
[edit on 22-11-2009 by C.H.U.D.]