Since these events can and do alter the orbit of comets. Such an ephemeral alteration could very easily bringing this comet significantly closer to Earth. Other comets have periods of several millions of years with orbits that take them far beyond the orbit of Pluto. Comets, like the planets, travel in regular orbits. However, some comets occasionally speed up or slow down in their orbits.
Solar radiation causes ice to evaporate on the sun ward side of the nucleus.
Molecules released by the evaporation stream away from the comet and generate a jet-type reaction that pushes the comet away from the Sun and slows it down. Where all good is, everything right with the Sun and the Moon. In the same state as the seventh rock. In the sky fire seen, a long spark running. The great one of Rome will die, the nigh over.