Thursday, April 10, 2014

Re: [Geology2] Expert reverses his position Skydiver rock; now said to be from the shute



The one problem I have with this story is that of size. If said meteor fell through the atmosphere, then is should be the remnant of a much larger chunk of space rock. If that is not the case, then a meteor of that size should've burned up upon entry of our atmosphere.

But for the sake of argument, let's suppose that the meteor IS part or a remnant of a larger meteor; if that is the case, shouldn't there have been a contrail or an explosion (aka a fireball) or a thermal signature from a larger, parent meteor burning upon entry? Wouldn't someone have heard it or seen the fall? Instead, we are told that the meteor had already cooled from its entrance into our atmosphere, so that the aforementioned small article of debate simply flew past the skydiver on its way to earth without any fanfare. I cannot believe that. Just cannot wrap my head around it.

What about the composition of the meteor, you might ask? Nickel/Iron burns just as readily as a chondrite upon entering our atmosphere, especially if the meteor is that small. Friction from speed of entry into the thicker layer of atmosphere would not allow any size meteor to effectively cool as it neared earth. Instead it should simply ignite and vaporize.

Why this bothers me to such an extent is that I thought I was a goner from a meteor strike. When I first spotted it, I'm sure it was as large as a house, but as it fell, the fireball lost more mass until by the time it was near the ground, its diameter was about 6'. Heat kept it from falling, as it slid along heated air, parallel to the ground until it burned completely. In short, it vaporized (my conclusion, as we couldn't find any trace of it later). That was one time I thought I was going to have to change my pants, because at first, I believed that speed and trajectory of the meteor was not going to let me live beyond that night.

Thanks,
Lin


On Wed, Apr 9, 2014 at 7:29 PM, MEM <mstreman53@yahoo.com> wrote:
 

So I am waiting until everyone has a "final final position" before reversing mine opinion that it is possible to catch a falling meteorite on video.   ( In fact one of the Chelyblinsk security cam videos caught a stone falling off a roof as well as the impact of the main mass falling through the ice of a lake but how soon we forget)




--


__._,_.___



__,_._,___

No comments:

Post a Comment