comet tail | scienceinfo.net

Rare mirage of comet's second tail as it approaches Earth
Comet Tsuchinshan-ATLAS
Comet's tail is longer than a billion km long
The ion tail of comet 153P / Ikeya-Zhang is at least 7.5 times the distance between Earth and the Sun, nearly double the previous record of the comet Hyakutake.
Why does a comet have many tails?
In 1986 when the famous Halley comet came back, its tail was especially noticeable.