What happens if a comet moves away far from the sun?

The tail of the comet is gas and dust boiled off by the heat if the sun. So no new tail material is emitted once it gets away from the sun. The material emitted near the sun goes into its own orbit, similar to but not the same as the comet. read more

When the comet moves further away from the Sun again, the evaporation ceases and stops, and coma and tail vanish, until the comet moves close enough to the Sun again. Eventually, all the ices will have evaporated, and if larger rocky parts exist, they will remain as asteroid(s). read more

As the comet moves farther away from the sun, the tail begins to diminish, as the heat and solar wind pressure on the cometary nucleus decreases. Far away from the sun, near the most distant point in it's orbit, the ices in the nucleus are frozen, and the comet is quiet. read more