A comet forms a so-called coma when it passes near the Sun. A comet undergoes sublimation when it warms up therefore producing a fuzzy like appearance. The term coma comes from the Greek word "kome" which means "hair".
The Coma is the fuzzy outer layer of a comet.
The tail of a comet, also known as its coma, grows as the comet gets close to the sun because of increases in temperature and force exerted by the solar wind. Since a comet's coma is usually composed of dust and vapor, the solar wind causes it to stream out away from the sun.
The "coma".
Halley's comet coma is 100,000 miles vs 15 miles.
Its the nebulous shock around the nucleus of the comet. Basically its the head of the comet.
A comet
The "coma".
nucleus and coma
head
Yes a nucleus of a comet is made of ice because a comet nuclei are loose collections of ice, we need to break down the three main parts of a comet a nucleus, coma, and the tail.
This is the coma, the portion of the comet that sublimates from the surface as it approaches the sun.
Comet Tempel 1, as viewed by the Stardust-NEXT mission Credit. The total brightness of coma and nucleus is 10 units, the coma is 9 units.