Where are ANY of the impactors? When one looks at all the images of cratered surfaces there is something that seems to be missing. Often when researching images it isn't what you can see or don't see, but what one should see and yet it isn't there. After years of researching craters, learning what scientists say about them and their formations, there remains one nagging question; Where are any of the impactors? The odds of all these craters we see not showing any impactors is virtually impossible. If it is true that all these craters are caused by impactors there should be many that show the impactor that caused it. http://antwrp.gsfc.nasa.gov/apod/ap060530.html The assumption that all impactors were traveling at velocities fast enough to disintegrate the impactor is impossible. The fact is that these objects traveling about our solar system and impacting the surfaces of planets and moons are not all going at "hyper velocities". All known meteors that have hit earth have never caused a crater, only holes in roofs, dented vehicles, and damaged printers. All of the other craters that are said to have been caused by a meteor here on earth is only an assumption, not a fact. http://antwrp.gsfc.nasa.gov/apod/ap990711.html http://epod.usra.edu/archive/epodviewer.php3?oid=186400
Meteor Crater in Arizona is believed to be from the impact of an Iron meteor, due to the presence of bits of iron in the surrounding debris. I believe that most of the impacts are at relatively high velocities (at a minimum at escape velocity, but in reverse direction), and the body would disintegrate upon impact.
I seem to remember a pretty big so-called 'impactor' hitting the Earth about 65 million years ago. Please Register or Log in to view the hidden image!
Meteors impact the Earth's upper atmosphere at Earth's escape velocity (40,000 kilometers per hour) or more. Atmospheric drag will reduce a meteor's impact velocity with the surface of the Earth. Small meteors can remain intact because atmospheric drag slows them to a much greater extent than large meteors. The atmosphere has very little impact on large meteors. I would call 40,000 kph a "hyper velocity". The facts are that several terrestrial features -- Meteor Crater, Chicxulub, Manicouagan, and others -- exhibit characteristics characteristic of what we think a terrestrial impact crater would look like. That Meteor Crater, Chicxulub, Manicouagan, and others are meteor craters are theories in the scientific sense of the word. Other testable hypotheses that purported to explain these terrestrial features have been falsified. Scientists have computed what would happen to a large rock crashing into the Earth at 40,000 kph or more. The impactor doesn't survive. Scientists have conducted experiments that yield mini craters by shooting objects at the ground. The damage to the Earth and to the impactor nicely match the theoretical predictions. Scientists have observed lunar impactors.
http://answers.yahoo.com/question/index?qid=20060811144652AAHdok9 This tells more of what happened to the dino killer
It probably killed a lot of dinosuars and a lot of fish, but it didn't kill everything. There's probably a bigger one (impactor) on the way.Please Register or Log in to view the hidden image!
I believe that there is an iron mine in Canada which is mining just such an ancient impactor. At any rate, the biggest reason the Earth doesnt resemble the moon with thousands of craters is primarily that Earths crust, especially prior to 4 GA has been recycled through the mantle thus removing any traces of them. Add sedimentation into the mix and its a little amazing that we find signs any craters at all.
Dont be such skeptics you guys. It's obvious that all of the eleventy billion large craters with no obvious visible impactors around the solar system were caused by alien superweapons.
Oh yeah, that's right, Norv has evidence from each and every one, showing they are still radioactive hotspots, and have unexpected mineral compostion, which could only have come from a nuke. He's visited them in his winged chariot, presumably.
Maast: This was posted in another thread. Check out Sudbury Astrobleme in Canada. (google) from 2 billion years ago, and the impact site still shows. Lots of nickel and other more valuable metals are being mined there. Until the 1960s it was not known to be an impact site.
From the question, it is clear that the person asking it has very little (if any) knowledge of the physics of collisions. It is not possible to answer the question without reference to the laws of physics which the questioner would clearly not understand. Prior to having this answered the questioner should be advised to attend classes in physics.
