Its called the 'Coma'. Its is both the dust that the solar wind blows off the comet as well as gases expelled as the comet heats up.
A coma
The center of a comet is called its nucleus.
A hazy Cloud called coma sorrounds the head of a comet.
The "coma".
This is the coma, the portion of the comet that sublimates from the surface as it approaches the sun.
The solid portion of a comet or more accurately, the source for all the gases and dust that make a comet visible to us, is called the nucleus.
It is called an orbit. A comet has an eccentric or parabolic orbit.
Comets are believed to have originated from asteroids in a sort of 'cloud', called the 'Oort Cloud'. It is thought all comets come from the Oort Cloud, which is a cloud of asteroids beyond the Kuiper Belt beyond Neptune. When one asteroid is knocked off from its orbit from the Oort Cloud, it makes really long trips around the Sun, which is why it becomes a comet. All of the asteroids in the Oort Cloud have some type of ice on them, since they are so far away from the sun that everything in the Oort Cloud seems to freeze.
because the comet can't stay in the suns pull and the Earth pulls it for a short time
The coma is a giant cloud of dust and gases around the nucleus.
The nebulous halo around the nucleus of the comet is called the "Coma" ...The stream of dust and gas that extends away from the comet is called the"Tail".
No. A comet is surrounded by various vaporized ices, but not hydrogen.