what is em
2007-06-07 04:46:22 · 7 answers · asked by Anonymous in Science & Mathematics ➔ Astronomy & Space
Read all about it below.
A meteoroid-type impact in Siberia in 1908, with widespread blast damage but no impact crater. Because it is unlike any other known event, it has given rise to quite a few crackpot theories, e.g. that an alien atomic-powered spacecraft was trying to make an emergency landing but blew up before reaching the ground.
2007-06-07 04:58:56 · answer #1 · answered by Anonymous · 1⤊ 0⤋
A huge explosion took place there in, I believe, 1908. It is believed it was a small comet striking the earth's atmosphere. The impact with the air was so intense that it flattened trees for a hundred square miles but never hit the ground. The shock wave was felt over a thousand miles away in cities of western Russia.
Since comets are comparatively "mushy" it is possible that one could create a huge and hot explosion as it hit the atmosphere, but fall into zillions of pieces and vaporize in a few seconds before it hit the ground. The trees were flattened by the air shock wave. And yes, it would be very bright, explosive, and hot. If a similar thing occurred today, it might be indistinguishable from a thermonuclear weapon. This has caused concern where advanced detection systems have been designed to pick up such explosions and put nations' military defenses on highest alert. Many have felt that such an impact today could cause a nuclear war. It gives the anti-nuke folks an imposing argument.
2007-06-07 12:00:15 · answer #2 · answered by Brant 7 · 0⤊ 0⤋
Look it up in Wikipedia.
Or follow the Discovery Channel or History Channel.
The 1908 explosion left no crater, just a massive area of blown-down trees in a radial pattern as if from a central blast. Some thought it couldn't be a meteor, but a comet instead.
The location was so remote and inhospitable that the first expedition to the area did not occur until 1921.
Later legend claimed it had to have been done by a UFO.
But just because there was no crater, it doesn't rule out a meteor because a meteor could have superheated and exploded above the surface. To date, no "meteorites" have been found in this marshy area of Siberia.
You haven't provided enough info to determine what "em" is.
2007-06-07 12:29:51 · answer #3 · answered by Anonymous · 0⤊ 0⤋
In 1908 (?) in the middle of nowhere in Siberia, a comet (or possibly an asteroid) came screaming in towards earth and superheated in the upper atmosphere. It exploded before it hit the earth, so it made no crater, but it did knock down lots of trees in a circular pattern. If the same thing happened today over a major city, millions would be killed. The site of the Tunguska blast was so remote it took over a year for scientists to mount an expedition to hike into the region to investigate, so any physical evidence of the object in question was not easy to find.
2007-06-07 12:00:33 · answer #4 · answered by eggman 7 · 0⤊ 0⤋
Comet or Meteor 1908 Tunguska region, Siberia
Air burst explosion at 37.5% tangent to the surface
Pattern was not circular, looked like butterfly
Big shock wave
Lost of dead trees.
Many Russians not happy.
2007-06-07 13:09:57 · answer #5 · answered by Anonymous · 0⤊ 0⤋
A meteoroid hit earth blowing its self but before it could make impact, it destroyed a huge forest.
2007-06-07 11:50:56 · answer #6 · answered by saosin 3 · 1⤊ 0⤋
http://en.wikipedia.org/wiki/Tunguska_event
2007-06-07 15:33:12 · answer #7 · answered by neutron 2 · 0⤊ 0⤋