Some comets disappear forever because when comets approach the sun they lose some ice, dust particles and gases each time. These comets finally change into asteroids. Some comets take hundreds of years to revolve around the sun.
Ans: Some comets disappear forever because when comets approach the sun they lose some ice, dust particles and gases each time. These comets finally change into asteroids. Some comets take hundreds of years to revolve around the sun.
