What observation regarding tails occurs when a comet is moving away from the Sun?

Answer

The tails often appear to lead the nucleus in its direction of travel.

Because the solar wind constantly pushes material outward from the Sun, when the comet moves away from the star, the tails remain oriented generally outward, appearing ahead of the nucleus relative to its direction of movement.

What observation regarding tails occurs when a comet is moving away from the Sun?
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