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impact event comparison table
Subject has location has material is a kind of has volume has temperature has velocity produce has momentum has synonym has product has extent has mass has definition has angular momentum has average interval time has has average interval time
asteroid impact  impact event   a crater world point       
comet impact  impact event   a crater world point       
extinction level event  impact event   a crater world point   impact event which can cause the extinction of many species on a planet 100 million years 
meteoror center of gravity naked eye object   sonic boom shooting starmeteorite (if meteoroid does not burn up)  A "shooting star" - the streak of light in the sky produced by the transit of a meteoroid through the Earth's atmosphere; also the glowing meteoroid itself. The term "fireball" is sometimes used for a meteor approaching the brightness of Venus; the term "bolide" for one approaching the brightness of the full Moon. one per hour from a given location on Earth, higher during meteorite shower 
meteor event  impact event   a crater world point   The event in a sequence of the events during the passage of a meteor. They are in order :
  1. incandescent flight
  2. fireball
  3. smoke trail
  4. meteoroid break up
  5. retardation point
  6. dark flight
  7. meteorite impact
   
Torino scale 10 impact  impact event   a crater world point   impact capable of causing a global climatic catastrophe  100000 years or longer
Torino scale 8 impact  impact event   a crater world point   collision capable of causing localized destruction  50 to 1000 years
Torino scale 9 impact  impact event   a crater world point   collision capable of causing regional devastation  1000 to 100000 years

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