100 years ago, last Monday... (Full Version)

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bipolarber -> 100 years ago, last Monday... (7/1/2008 4:00:38 PM)

...something exploded over Tunguska, Russia. The blast was felt several hundred miles away, the the concussion was picked up on seismic recorders all the way around the world. Yet, when teams of researchers arrived at "ground zero" there was no crater, and there were still trees standing at the very center of the blast site. (proof that whatever it had been, it exploded before reaching the surface.

100 years ago, last Monday, the Earth was hit by a cometary fragment. Since then, no other objects remotely that powerful have come close... yet, we know that the average time between such impacts is usually around 50 to 60 years.... we're overdue.




Zensee -> RE: 100 years ago, last Monday... (7/1/2008 5:52:25 PM)

So how about a CM Comet Pool - divide the globe into segments and charge $5 bucks a guess...


Z.




kittinSol -> RE: 100 years ago, last Monday... (7/1/2008 6:00:59 PM)

I have my ticket out of this planet booked on the next flight [sm=abducted.gif].




FirmhandKY -> RE: 100 years ago, last Monday... (7/1/2008 6:57:15 PM)

quote:

ORIGINAL: Zensee

So how about a CM Comet Pool - divide the globe into segments and charge $5 bucks a guess...


Z.



... I'll take Washington DC for 5 ...

Firm




Vendaval -> RE: 100 years ago, last Monday... (7/1/2008 7:14:44 PM)

My bet is that comets and meteors will be crashing into old satellites and other space debris.




Termyn8or -> RE: 100 years ago, last Monday... (7/1/2008 8:47:30 PM)

Isn't that around the time Tesla was playing around ?

Kidding aside, the Earth is pelted all day and all night long, and million of meteorites and even a few bigger chunks are almost always disintegrated in the atmosphere, usually the upper atmoshere.

There are a number of them that get caught into orbit and just stay there. Then the ones with a trajectory headed straight for the Earth don't have it so good. They weren't just floating along, they had a relative velocity, and once they get close enough to the planet that velocity refereneced to the planet and it's atmosphere builds at 32 feet per second per second. This rapidly builds to the point where simple air resistance creates so much heat that it just burns up, or in some cases blows up.

So what you are saying is that they plotted the thing and then went to where they heard a big explosion but found no meteor there. Well, if it did explode it did not do it at an elevation of ten feet, it had to be higher than that. Otherwise the expected destruction would be there, regardless of the absence or presence of the actual meteor. Remember Crater Lake.

But that brings us to the perspective on meteors, I must agree it is true, that mathematically we are getting about due. Something big. It must be of sufficient mass to make it to the ground. Notice you don't have gravel falling on your head. You might on the moon though........

The odds of this happening yesterday, today and tomorrow are actually the same. But those odds are derived from numbers, and numbers do not lie, so I agree that we are about due, but that does not mean it is going to happen. Neither does it mean that it will not.

I could see FEMA sticking both thumbs up their ass if it happens though.

T




DomKen -> RE: 100 years ago, last Monday... (7/1/2008 8:51:25 PM)

quote:

ORIGINAL: bipolarber

...something exploded over Tunguska, Russia. The blast was felt several hundred miles away, the the concussion was picked up on seismic recorders all the way around the world. Yet, when teams of researchers arrived at "ground zero" there was no crater, and there were still trees standing at the very center of the blast site. (proof that whatever it had been, it exploded before reaching the surface.

100 years ago, last Monday, the Earth was hit by a cometary fragment. Since then, no other objects remotely that powerful have come close... yet, we know that the average time between such impacts is usually around 50 to 60 years.... we're overdue.

Actually there is conjecture that there is a crater, now a lake, and an expedition is headed up there fairly soon to see if they can find a fragment or at least verify that the lake is the crater from the explosion.




Vendaval -> RE: 100 years ago, last Monday... (7/1/2008 9:19:19 PM)

Remember the hoop-la when Skylab was descending into the Earth's atmosphere several years ago?




candystripper -> RE: 100 years ago, last Monday... (7/1/2008 9:38:09 PM)

A source for this 'factoid', please, bipolarber.
 
candystripper




FirmhandKY -> RE: 100 years ago, last Monday... (7/1/2008 9:50:57 PM)

quote:

ORIGINAL: candystripper

A source for this 'factoid', please, bipolarber.
 
candystripper


uh ... it's pretty commonly known by people interested in this sorta thing.  They've even done a Discovery Channel show or two.

(I first read about it what I was a whippersnapper around 9 or 10.)

Here's lots of links:  Tunguska

Firm




thornhappy -> RE: 100 years ago, last Monday... (7/2/2008 3:22:49 PM)

Them & National Geo channel (yep, it was a different show).

Discover Magazine's also covered it.

thornhappy




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