When approaching the Sun, the comet takes on a spectacular appearance, heating up under the influence of solar heat so that gas and dust fly away from the surface, forming a bright tail. Each comet has several different constituent parts: the core: relatively solid and stable, consisting mainly of ice and gas with small additions of dust and other solids; head (coma): a luminous shell of gas that appears under the influence of electromagnetic and corpuscular radiation from the Sun. A dense cloud of water vapor, carbon dioxide and other neutral gases sublimating from the core; Dust tail: consists of very fine dust particles carried away from the core by the gas stream. This part of the comet is best seen with the naked eye; plasma (ion) tail: consists of plasma (ionized gases), intensely interacts with the solar wind.
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