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Comets - School Essays

Comets


have been witnessed ever since man has been speculating about objects in the nighttime sky and appear in records from the beginning of recorded civilization (Schweighauser 20).
are made up of four distinct features. The first is the nucleus. The nucleus is made up of frozen gases, mostly water vapor with lesser amounts of carbon dioxide and carbon monoxide, and imbedded in the frozen gases are interplanetary dust and tiny fragments of stony and metallic meteoric material. Some , the larger ones, have a nucleus of 10 kilometers (Schweighauser 22).
The second feature of is the coma. The coma is composed of atoms and molecules of gas that travels with the nucleus. The coma may be up ...

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the head of the comet and in the opposite direction from the sun. According to Charles A. Schweighauser in his book, entitled Astronomy from A to Z: A Dictionary of Celestial Objects and Ideas, he states that we see comet heads and tails because they not only reflect sunlight, but they also fluoresce—give off their own light—when are near the sun. The tails from the comet may be up to 150 million kilometers long each or together.
have a predictable orbit. There are one thousand that have been charted. Some go by the sun once and others, which are called periodic , pass the sun repeatedly following a predicable pattern. I have chosen a periodic comet called Tempel-Tuttle. Ernst Wilhelm Liebrecht Tempel and Horace Parnell Tuttle discovered this comet. This comet has been witnessed as early as 1366. The best apparition was that of 1366 when it passed 0.0229 AU from earth, making it the third closest approach of a comet to our planet in recorded history. ON the most recent ...

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PAPER DETAILS
Added: 2/16/2004 01:00:37 AM
Category: Science & Nature
Type: Free Paper
Words: 431
Pages: 2

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