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Comet Ikeya-Zhang - the "ion tail"
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As Comet Ikeya-Zhang approached the Sun, it developed a complex blue "ion tail". The "ion tail" is composed of ions that boiled off the nucleus and were pushed away from the Sun by the out-flowing fast-moving particles of the solar wind. Complexity in the tail is created by comet nucleus rotation, variability in the comet surface evaporation rate and variability of the Sun's magnetic field and solar wind.
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