A comet is a strange space object that makes its way in and out of the orbits of planets.
Some comets have definable orbits and some just seem to keep on flying, never to return. A comet has a head and tail.
The head of a comet is largely composed of small particles of stony material cemented together by methane or ammonia frozen in ice particles.
When the comet approaches the Sun, or another body with great heat or strong gravity, the head may break into pieces, leaving behind a meteor cloud or a long, sweeping tail.
The comet gets its name from the Greek word kometes, which means long hair.