why deos the tail of a comet increases when it come near sun ??????no link plz
 

    Dear student,
Most comets are made up of frozen ice and dust particles.The length of tail of comet increases because when the comet comes towards the earth(from sun), the condensed gases in comet evaporate as sublimation rate becomes high and other gases also evaporate. Thus the length of gaseous tail of comet increases while coming to sun.

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YES PLEASE ANSWER ANYONE, THIS IS MY QUESTION ALSO
 
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Comet become visible on coming close to the sun because the sun rays make it gas glow which then is pressed to form a tale millions of kilometres long

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