Which is the hottest planet in the solar system?

Venus is the hottest planet although it is second to mercury. The degree of hotness of a planet does not depend as much on closeness to the Sun as on its atmosphere. Carbon dioxide has the tendency to absorb heat which in turn increases the temperature. Mercury's atmosphere does not contain carbon dioxide (because of which all the heat is returned to space). The reason behind the hotness of Venus is the layer of thick atmosphere which is about 100 times more massive than our atmosphere on Earth. The greenhouse effect on Venus causes the temperatures at its surface to reach 864 degrees Fahrenheit (462 degrees Celsius), making Venus the hottest planet in the entire Solar System. Even it is the brightest planet in the night sky. Sometimes Venus appears in the eastern sky before sunrise. Sometimes it appears in the western sky just after sunset. Therefore it is often called a morning or evening star, although it is not a star. Venus has no moon or satellite of its own. It rotates from east to west while the earth rotates from west to east. Venus is known as earth’s twin. The surface of Venus is solid and covered in dome-like volcanoes, rifts, and mountains, with expansive volcanic plains and vast, ridged plateaus.