A nucleus and a tail
The three main parts of a comet are the nucleus (solid core made of ice and dust), coma (gaseous envelope surrounding the nucleus), and tails (two types, ion tail composed of ionized gas and dust tail made of dust particles).
a comet
ETHANE
The coma, the nucleus, and the tail are the parts of a comet after the tail has formed.
TAUTONYM
What DO comet tails originate from? They are formed when the sun causes gas and dust to leave the comet, and are then swept away by solar winds. This is why that no matter which direction a comet is traveling, it's tail is always pointed awY from the sun.
A Comet
maybe
The three main parts of a comet that are always present are the nucleus (composed of ice, gas, and dust), the coma (a cloud of gas and dust surrounding the nucleus), and the tail (formed when the coma is blown away by the solar wind).
type 2
The tail. The tail is composed of gas and dust released from the comet nucleus when it approaches the Sun. Comet tails can be incredibly long, some as long as 150 million kilometers. As the comet recedes out into the Solar System away from the warmth of the Sun, it stops shedding dust and gas and the comet loses its tail.
head, tail,body