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Meteors are meteoroids that get pulled into Earth's atmosphere by Earth's gravity. Meteoroids can form from asteroids colliding or as debris from comets speeding by the Sun. What are meteoroids, meteors, and meteorites?Ī meteoroid is a small piece of rock or metal that has broken off from a comet or an asteroid. Relation to the rest of the Solar System.
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The outer limit of the Oort cloud defines the outer boundary of the Solar System. This is where long orbit comets come from. Well beyond the Kuiper belt, scientists believe there is another collection of billions of comets called the Oort cloud. The Kuiper belt contains millions of icy objects including some larger objects like the dwarf planets Pluto and Eris. It is much larger than the asteroid belt. The Kuiper belt is a region of the Solar System that lies beyond the planets and the orbit of Neptune. Scientists think that long period comets come from the Oort cloud. Some long period comets have orbits of thousands of years. Long period comets have orbits of greater than two hundred years. The second type of comet is the long period comet. These types of comets originate from the Kuiper belt.
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Some have very short orbits of just a few years. Short period comets have orbits of less than two hundred years. The first type of comet is the short period comet. Comets are usually divided into two groups determined by the type of orbit they have.