Nucleus. The nucleus of a comet is also known as the core.
Coma. The spherical envelope of gas that surrounds a comet'snucleus is called a coma.
Hydrogen Cloud.
Dust Tail.
Ion Tail.
What is comet?
Comets are frozen leftovers from the formation of the solar system composed of dust, rock, and ices.
They range from a few miles to tens of miles wide, but as they orbit closer to the Sun, they heat up and spew gases and dust into a glowing head that can be larger than a planet.
A comet is an icy, small Solar System body that, when passing close to the Sun, warms and begins to release gases, a process that is called outgassing.
