Comets are made of dust and ice that has
accumulated at the fringes of the solar system.
The gravity of the sun or other object sometimes
perturb comets into a long orbit that brings it
towards the sun. If the comet is made of ice that
vaporizes when heated, why do you think comets
form tails as they approach the sun? What
direction do you think the tail goes, directly
behind the comet from the direction it is moving,
or directly away from the sun?
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