long tail, streaming across the heavens. Observations of the comet of 1577 by

Tycho Brahe demonstrated that comets were more distant than the moon. Some

comets are spectacular objects, but definitely the greatest numbers are not very

bright, and many do not develop tails. Comets are classed with asteroids,

satellites of the planets, and meteoroids. Comets provide a source of

information on how the solar system originated, and also provide opportunity to study

matter under abnormally physical conditions. The distinguishing feature of a

comet is its ability to release large amounts of dust and gas when its nucleus

is heated by solar radiation when close to the sun. The material released is

lost to the comet, and therefore the lifetimes of comets must be limited.

The majority of comets observed today is faint, and have no tail and little

coma. While in orbit, comets cover a wide range, moving about the sun in

orbits impossible to tell apart from those of minor planets, while others follow

paths similar to the earth's orbit plane. Many comets have elongated orbits,

which draw back to tens of thousands of a

differences in their composition are clearly responsible for the differences in the

attach the comet tail by interaction with the Interplanetary Magnetic Field.

Some topics in this essay:
Tycho Brahe, Oort Cloud, COMET NUCLEUS, TRAJECTORIES Comets, TUMBLING NUCLEUS, Magnetic Field, COMET TAILS, AU AU, II III, , solar system, dust particles, sun comets, close sun, oort cloud, comet nucleus, inner solar system, develop tails, type comets, minor planets, inner solar, comets oort cloud, comet approaches sun,