if mercury is the closest planet to the sun,then why venus is called the hottestthough it isnot the closest planet?

The atmosphere on Venus consists almost entirely (96%) of carbon dioxide (CO2), a greenhouse gas responsible for the incredibly hot, greater than 400ÂșC conditions on Venus, surpassing the melting point of lead. Hence, it is hotter than Mercury.

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 This  is  because ,  the  atmosphere  of  venus  contains  a  larger  proportion  of  CO2.  CO2  traps  heat.  So,  because  of  the  high  heat  temparature,  venus  is  the  hottest  planet  of  the  solarsystem.

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