What creates a tail on a comet?
Well, a comet is a giant ball of ice and dust that travels through space, right? A tail is created when the comet passes near enough to a star to start being heated up by the star (like our sun). The star’s heat and the “solar wind” (which is a bunch of very very very small particles that the star blows off of itself all of the time) makes the side of the comet that’s facing the sun warm up, which makes the icy mud turn to slush, and then to steam. This steamy dust sprays out behind the comet, and creates a tail.