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Originally posted by Doalrite
reply to post by cavalryscout
We have nothing to worry about with this one.... its the bullet you don't hear that kills you
This could be the V spacecraft invasion the keep warning about on the news as a possibility.
Originally posted by Connman
Couldn`t this be a little bad even if it doesn`t impact Earth.
It`s Like running through major traffic, traffic with no brakes . Satellites smashing satellites raining sparks and chunks down on the Earth It would only need to hit one right and start a chain reaction?
"A century later some still debate the cause and come up with different scenarios that could have caused the explosion," said Yeomans. "But the generally agreed upon theory is that on the morning of June 30, 1908, a large space rock, about 120 feet across, entered the atmosphere of Siberia and then detonated in the sky."
It is estimated the asteroid entered Earth's atmosphere traveling at a speed of about 33,500 miles per hour. During its quick plunge, the 220-million-pound space rock heated the air surrounding it to 44,500 degrees Fahrenheit. At 7:17 a.m. (local Siberia time), at a height of about 28,000 feet, the combination of pressure and heat caused the asteroid to fragment and annihilate itself, producing a fireball and releasing energy equivalent to about 185 Hiroshima bombs.
Also scientists believe a chunck of that thing one meter in size is responsible for creating a lake as well.
"That is why there is no impact crater," said Yeomans. "The great majority of the asteroid is consumed in the explosion."
The Guinness Book of World Records (1966 edition) states that due to the rotation of the Earth, if the collision had occurred 4 hours 47 minutes later, it would have completely destroyed the city of St. Petersburg.
In June 2007, scientists from the University of Bologna identified a lake in the Tunguska region as a possible impact crater from the event. They do not dispute that the Tunguska body exploded in midair but believe that a one-meter fragment survived the explosion and struck the ground. Lake Cheko is a small, bowl-shaped lake approximately 8 kilometres north-northwest of the hypocenter. The hypothesis has been disputed by other impact crater specialists. A 1961 investigation had dismissed a modern origin of Lake Cheko, saying that the presence of metres-thick silt deposits at the lake's bed suggests an age of at least 5,000 years; but more recent research suggests that only a meter or so of the sediment layer on the lake bed is "normal lacustrine sedimentation," a depth indicating a much younger lake of about 100 years. Acoustic-echo soundings of the lake floor provide support for the hypothesis that the lake was formed by the Tunguska event. The soundings revealed a conical shape for the lake bed, which is consistent with an impact crater. Magnetic readings indicate a possible meter-sized chunk of rock below the lake's deepest point that may be a fragment of the colliding body. Finally, the lake's long axis points to the hypocenter of the Tunguska explosion, about 7.0 kilometres (4.3 mi) away. Work is still being done at Lake Cheko to determine its origins.