Why isent mercury the hotest planet?

Answer 1

Mercury, even though the closest planet to the sun, isn't the hottest planet because of the thing it lacks and that most planets have, an atmosphere. Venus is the hottest planet, the reason?... Venus's atmosphere. What makes its atmosphere special? It is 92 times as dense as Earths atmosphere and consists of 98% carbon dioxide. These properties make Venus's atmosphere like a magnifying glass that has the same diameter as the sun and the magnification power of an electron microscope, and a heat blanket that is so ridiculous that there isn't even a simile for it.

Answer 2

While Mercury is the closest planet to the sun, it is not the hottest planet in our solar system. Venus holds that title due to its thick atmosphere that traps heat from the sun, creating a greenhouse effect. Mercury's lack of atmosphere allows heat to escape back into space, resulting in cooler surface temperatures despite its proximity to the sun.