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| - The tall red bar represents 465 comets with extremely high energy???comets that could, in theory, travel far from the Sun, such as 2,000 AU, 10,000 AU, or 50,000 AU. (As you will soon see, this great range explains why this red bar represents so many comets.) These comets, traveling on long, narrow ellipses that are almost parabolas, are called near-parabolic comets.
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