A comet flies past the sun on its extend solar orbit.
Comets are mysterious and inspire awe. They were looked upon as foreboding heavenly messengers, harbingers of doom, foretelling disasters and misfortune. That is until the scientific revolution proved a more sound explanation. A comet's nucleus is composed of ice and dust. As it nears the Sun during its orbit, some of the ice evaporates as its surface is heated. This gas becomes ionized and is drawn outwards by the solar wind to form a tail which points away from the Sun. The released dust may also form a second tail as it is pushed by radiation pressure.