by comet's a great way to travel it is made of ice and gravel its goes around in an elipse we look foward to its trips it never seems to start or stop it has names like " halle-bopp" it carries meteors in its train they fall down like fiery rain if one falls to earth alight it is called a meteorite
sources and info
CometsComets
are small rock, dust and ice objects that orbit the Sun. In 1950, Fred
Whipple proposed the "dirty snowball" picture of comet structure. The
nucleus of the comet - typically about 10 kilometers across - is
composed mostly of dust and ices of carbon dioxide, water, ammonia and
methane. As the comet approaches the Sun, the ices in the nucleus
sublime to form the coma, a dense cloud of gas and dust particles
around the nucleus. The coma contains water, carbon dioxide and other
neutral gases. |  |
comet
 | Comet NEAT (C/2001Q4)
| A
small astronomical body, typically a few kilometers across, that orbits
the Sun.
Comets contain icy chunks and frozen gases with bits of embedded rock
and dust, and possibly a rocky core, aptly described as a "dirty
snowball."
Comets are leftovers from the formation of the Solar
System and are believed to exist in vast numbers in the Oort
Cloud and, to a lesser extent, in the Kuiper
Belt. From these regions they can be perturbed by the gravitational
influence of passing stars or interstellar clouds and thrown into new,
highly elliptical orbits
(see ellipse)
that bring them into the inner Solar System.
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