A comet looks rather like a star with a long tail, and it moves in a long, oval orbit or path around the Sun. A comet has three parts – the nucleus, the coma and the tail. The nucleus is made up of a cluster of meteors. The coma is a veil of thin gasses and star dust that surround the nucleus. The long, shining tail is a cloud of particles repelled by the Sun’s light. Some comets have more than one tail. All of the comet’s light comes from the Sun, and as the comet gets nearer to the Sun in its travels it shines more and more brightly.
The path of the comet is so long that we may see one particular comet only once in fifty or in a hundred or two hundred years. When we see a meteor it flashes across the sky in an instant, but a comet does not appear to move any faster than the Moon.