The solid object at the head of a comet is called the comet nucleus.
It is called a Coma.
.... errr - well comets.
short period comets
snowballs
long period comet
Comets are called this because of the ice and dust inside the nucleus. Now go look up everything else on your own.
Dirty snowballs
Its called FRICTION
When you hit it very hard over the head.
They are called comets.
no, only comets develop glowing tails.Fun Fact:some scientists called comets "dirty snowballs"
If you mean all our planets and comets, it's called the Sun. It is called "The Solar System".