A comet is completely made out of ice, dust, and rock.
Comets will melt halfway or completely in several thousand years.
Some comets pass by the sun so close that they get dragged in by its strong gravity and disappear forever.
Comets are some of the material left over from the formation of the planets.
Comets are formed from the collapse of a giant cloud of gas and dust.
Comets come from the Kuiper belt and the Oort cloud.
Comets are called dirty snowballs.
Halley's comet is the most famous. You can see Halley every 75 years.
Comets are named after the people who discovered the comets.