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Meteorites found in Calif. along path of fireball - 0 views

  • Meteorites found in Calif. along path of fireball
  • pieces from a meteor that was probably about the size of a minivan
  • rocks came from a meteor, believed to between 4 to 5 billion years old
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  • scientists have confirmed his suspicions: it's one of the more primitive types of space rocks out there, dating to the early formation of the solar system 4 to 5 billion years ago
  • found the first piece on Tuesday along a road between a baseball field and park on the edge of Lotus near Coloma, where James W. Marshall first discovered gold in California, at Sutter's Mill in 1848.
  • Robert Ward has been hunting and collecting meteorites for more than 20 years
  • Ward, who has found meteorites in every continent but Antarctica
  • CM" - carbonaceous chondrite
  • actually has two rocks but suspects they were part of the same small meteorite that broke on impact. Each weighs about 10 grams - about the same as two nickels
  • Experts say the flaming meteor was probably about the size of a minivan when it entered the Earth's atmosphere with a loud boom and about one-third of the explosive force of the atomic bomb
  • seen from Sacramento, Calif., to Las Vegas and parts of northern Nevada.
  • event of that size might happen once a year around the world
  • most of them occur over the ocean or an uninhabited area
  • most meteors you see in the night's sky are the size of tiny stones or even grains of sand, and their trail lasts all of a second or two
  • meteor probably weighed about 154,300 pounds
  • probably released energy equivalent to a 5-kiloton explosion - the Hiroshima bomb was 15 kilotons
  • The boom, another expert said, was caused by the speed with which the space rock entered the atmosphere
  • Meteorites enter Earth's upper atmosphere at somewhere between 22,000 mph and 44,000 mph - faster than the speed of sound, thus creating a sonic boom.
  • friction between the rock and the air is so intense that "it doesn't even burn it up, it vaporizes
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