Comet

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A Comet is an icy body that releases gas or dust. They are thought to be dirty snowballs, mixtures of dust and ice that spend most of their time in deep freeze beyond the orbit of Pluto. When they come close to the sun on their very eccentric, elliptical orbits, the ice melts and evaporates leaving a trail of dust and ions. This trail is visible from earth if skies are dark enough, and makes for a celestial object that is neither a meteor, star nor planet. Comets with their tails can spread over the sky larger than the big dipper, and occasionally brighter than the milky way.


Contents

Contents of Comets

They have a nucleus, which is a hard ball of ice. The nucleus contains mostly frozen water and many other chemicals. Comets have a dense cloud called a coma, which is the cloudy atmosphere around the nucleus. The dust and ion tail are formed when the radiation from the sun pushes dust particles away from the coma. They also have a large cloud of neutral hydrogen associated with them.The comets generally point toward the eastern or western horizon because the sun's light pushes the tail away from the sun.

Many of our meteor showers are known to be associated with comets. The comets leave a stream of sand and dust along their orbit, and if the earth crosses this orbit the sand and dust make meteor trails in our atmosphere. In this way meteor showers can be predicted on a yearly basis.


Visible Comets

Comets have been known since antiquity in China and in the records of other countries. Comets are often discovered by amateur astronomers, though recent computerized sky surveys are finding most of the comets as they approach the sun. When near the sun, the ices of the comet melt and form the comets we see in photographs. Some comets are periodic like Haley's comet with a period of less than 200 years. Of the 878 known comets 184 are periodic comets [1]. Most comets are too small or too faint to be seen without a telescope. Some comets, however, become visible to the unaided eye for several weeks as they pass close to the sun [2].

Problems with Big Bang

Comets are of interest for origins because they are associated with our solar system. Usually a comet has a life span less than 10,000 years [3]. According to the Big Bang hypothesis, comets usually originated from the explosion that happened about 13.7 billion years ago.

Questions for non-believers are...

  • If the big bang happened about 13.7 billion years ago, then why do we see so many comets around our solar system?
  • If there was a big bang, then should not the comets disintegrate a long time ago (especially since they orbit many stars, therefore losing more mass even faster.)
  • There are rising arguments about an Oort Cloud. This is believed to have billions of comets orbiting it. The problem is that there is no tangible evidence to support it. Those who made it up, said it is to far to see ever... talk about big faith for those who believe. Obviously there has been a radical assumption. If there is no Oort Cloud, then what could it be?

Answer = God


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