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Section 1 Background information (paper 1-7) · According to astronomers a big asteroid 10 km across will hit the earth again. · It hit 65 million years ago · Would travel at 30,000 km/h · Killed off dinosaurs, and two thirds of all life. · This changed the course of evolution · Thousands of small meteorites hit the earth every year, and some pass close to earth · In first billion of year 100000 of comet could hit the earth · March 23rd 1989 an asteroid 1 km big just missed the earth, by only 1 km and no one saw it coming. · October 19th 1977 Charles Kowal discovered the asteroid 2060 and this asteroid diameter is been estimated 200km, and this asteroid were called Chiron. · In 1988 they found out that Chiron is a comet and they found out this by this huge comet are turning fizzy just by getting closer to the sun. · Chiron was similar to the one of the moon of Uranus and Neptune and this comet could be escaped from Kuiper belt or Oort cloud. · In 2126 comet Swift-Tuttle will pass close by to earth but will only have a small effect on the earth, and for it to hit us it would take just a slight path change. · In 1994 comet Shoemaker-Levy actually crashed into Jupiter with a force which would have devastated earth · On 30th August 1992 David Jewitt and Jane Luu announced that they found some object beyond the Pluto using 2.2 meter telescope. · This object is moving in front of the stars of Pisces and this object was given the code number 1992 QB1 but David and Jane called it Smiley and it was 200Km across and the first member of the Kuiper belt. · The first asteroid that is discovered was Ceres in 1st January 1801 and found by Italian. The Diameter of this asteroid was nearly 1000km. · Only three asteroids were over 500km-Ceres, Pallas, and Vesta. And several of them were over 100km. · In October 1991, the Galileo space probe, on it way to Jupiter, flew past the asteroid Gaspra. At the distance of only 1600km Galileo gave as the first close up view of the miner planet. · Gaspra shape is same as other asteroids and measures 19x12x11km. · Every year hundreds of new asteroids are been found and asteroids is given a number. There is now over 6000 asteroids are been numbered. · Asteroids are also given some names. First they named by Greek mythology but now them using anything like Mozart and Debussy.
 * Click || asteroids ||
 * Click || Meteor ||
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 * Click || Asteroid belt ||
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 * Click || Martin.Newa ||