Illustrations

Artwork Of The Nucleus Of A Comet

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Illustration ID#
11179320
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Date Uploaded
15 Jun 2012
Date Created
 

Description

artwork of the icy core (nucleus) of a comet. comets are mostly frozen ices (water, methane and ammonia) and dust, and they are often referred to as 'dirty snowballs'. the nucleus of a comet can be many kilometres across. they orbit the sun on highly elliptical orbits. when far from the sun they are inert; but as they approach the inner solar system the sun's heat warms them up, surface ices begin to melt and jets of high-pressure gases begin to erupt from the surface. it is these gases that give the comet its distinctive coma (head) and tail.

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