SOLAR SYSTEM

Detailed explanation-1: -The coma is a cloud of gases that surrounds the nucleus of a comet. In some comets, a cloud of hydrogen gas surrounds the coma. This hydrogen cloud may be as big as 3 million kilometers (about 2 million miles) across.

Detailed explanation-2: -The nucleus contains icy chunks, frozen gases with bits of embedded dust. A comet warms up as it nears the Sun and develops an atmosphere, or coma. The Sun’s heat causes the comet’s ices to change to gases so the coma gets larger. The coma may extend hundreds of thousands of kilometers.

Detailed explanation-3: -The gas (water vapor, carbon monoxide, carbon dioxide, and traces of other substances) and dust forms an “atmosphere” around the nucleus called a “coma.” Material from the coma gets swept into the tail.

Detailed explanation-4: -The coma is a large, dusty atmosphere surrounding the nucleus, made up of sublimated gas mixed with dust. The tail consists of gas and dust that can extend hundreds of millions of kilometers away from the coma.

Detailed explanation-5: -The nucleus is a solid body typically a few kilometres in diameter and made up of a mixture of volatile ices (predominantly water ice) and silicate and organic dust particles. The coma is the freely escaping atmosphere… …of materials then forms the cometary coma, the comet’s atmosphere.