by kovil » Mon Mar 20, 2006 3:33 am
Recently crawling around the Astrophysical Journal site, this exact map is on one of their articles, (i saved it too) I am guessing the poster on APOD just lifted that map for here.
Wolf; Every one of those plotted objects is way big enough to do major damage to Earth, that's why they are mapped ! Tho it is 100,000,000 to 1 that any one of them will ever hit earth. So relax and pass me another cold one !!
Besides at their ambient velocity they would pass thru 11 miles of earths atmosphere in one second, and man that's fast ! When I visualize that speed, I can see the atmospheric shock wave easily developing.
One early evening while getting gas for my truck, this very bright light in the low western sky seemed to be getting brighter and closer and it had a growing larger shiney aura behind it. It really caught my attention. As I watched it for another 30 seconds, the aura then suddenly got very wide, very fast. The bright light continued, then diminished and disappeared, leaving a vapor trail that slowly started to get wiggly from the very straight appearance before.
I first thought an airplane was heading for me and was going to crash nearby and I wondered if I should split very quick.
What it actually was, I fully realized after it was over. I had an inkling when the aura got wide very fast.
It was a rocket launch from Vandenberg near Oxnard CA. I was in LA.
This is the only one I ever saw while it was happening. I've seen the trails afterwards many times, with their distinctive wiggly paths.
The main realization that hit me is how thin the atmosphere really is.
When the vapor trail got wide very fast, the rocket was hitting the zone where the stratosphere is, or it was suddenly above the atmosphere at maybe 90,000 feet or something, and the thrust vapors past the nozzle had no atmospheric pressure to hold back its expansion.
There is a visceral realization to watching a rocket go up through this gossamer thin veil of our earthly atmosphere and into space where no restraint to pressurized expansion exists.
It was 1/2 a minute of roller coaster understandings and perplexation.
To see an asteroid transit the atmosphere in one second, 11 miles per second standard incoming velocity, it would make quite a push in the air.
Recently crawling around the Astrophysical Journal site, this exact map is on one of their articles, (i saved it too) I am guessing the poster on APOD just lifted that map for here.
Wolf; Every one of those plotted objects is way big enough to do major damage to Earth, that's why they are mapped ! Tho it is 100,000,000 to 1 that any one of them will ever hit earth. So relax and pass me another cold one !!
Besides at their ambient velocity they would pass thru 11 miles of earths atmosphere in one second, and man that's fast ! When I visualize that speed, I can see the atmospheric shock wave easily developing.
One early evening while getting gas for my truck, this very bright light in the low western sky seemed to be getting brighter and closer and it had a growing larger shiney aura behind it. It really caught my attention. As I watched it for another 30 seconds, the aura then suddenly got very wide, very fast. The bright light continued, then diminished and disappeared, leaving a vapor trail that slowly started to get wiggly from the very straight appearance before.
I first thought an airplane was heading for me and was going to crash nearby and I wondered if I should split very quick.
What it actually was, I fully realized after it was over. I had an inkling when the aura got wide very fast.
It was a rocket launch from Vandenberg near Oxnard CA. I was in LA.
This is the only one I ever saw while it was happening. I've seen the trails afterwards many times, with their distinctive wiggly paths.
The main realization that hit me is how thin the atmosphere really is.
When the vapor trail got wide very fast, the rocket was hitting the zone where the stratosphere is, or it was suddenly above the atmosphere at maybe 90,000 feet or something, and the thrust vapors past the nozzle had no atmospheric pressure to hold back its expansion.
There is a visceral realization to watching a rocket go up through this gossamer thin veil of our earthly atmosphere and into space where no restraint to pressurized expansion exists.
It was 1/2 a minute of roller coaster understandings and perplexation.
To see an asteroid transit the atmosphere in one second, 11 miles per second standard incoming velocity, it would make quite a push in the air.