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.
The Coma is the fuzzy outer layer of a comet.
The "coma".
A comet
The nucleus and the coma compose the core of the comet. The nucleus is the solid, rocky part at the center, while the coma is the surrounding cloud of gas and dust that forms as the comet gets closer to the Sun and begins to vaporize.
Coma changes shape due to the evaporation of volatile materials like ice and dust grains from the nucleus of a comet. As the comet approaches the sun, these materials sublimate, creating a halo-like coma that can extend for thousands of kilometers. The shape of the coma can also be influenced by solar radiation and the comet's rotation.
The Coma is the fuzzy outer layer of a comet.
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.
nucleus and coma
The "coma".
A comet
head
This is the coma, the portion of the comet that sublimates from the surface as it approaches the sun.
A hazy Cloud called coma sorrounds the head 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.
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".