It is false that comet lives are increased the more often that they pass by the sun. This is because when a comet gets closer to the sun, a gaseous phase called coma will result from the ice on the nucleus.
It is false that comets do have tails to keep them away from the earth. They do not have tails but they have coma due to its icy state that is an indication of its other term as "dirty snowball" that escapes from the comet.
