A Comet Has Two Tails
Folded paper and vellum
Lee Anne Willson 2005

Most comets do have two tails; one is a dusty tail that is pushed away from the comet by sunlight; the other is an ion tail that is swept up by the solar wind. The dusty tail is diffuse and curves gently; the ion tail is usually lumpy and closer to a straight line. Both point away from the Sun, at least near the coma (head) of the comet. The nucleus of a comet is generally too small to see and no attempt has been made to include that detail here.