Question

why does a comet develop a tail while approaching the sun ????

Answer 1

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Comets develop tails as they approach perihelion—the place in their orbits when they are closest to the Sun. The Sun's heat vaporizes some of the comet's material, releasing dust particles that were trapped in the ice.

Answer 2

Answer:

Tail formation The streams of dust and gas thus released form a huge, extremely tenuous atmosphere around the comet called the coma, and the force exerted on the coma by the Sun's radiation pressure and solar wind cause an enormous tail to form, which points away from the Sun