Saturn is the least dense out of all of the planets in our solar system. Its average density is around 0.7 g/cc (less than water). It also has a thick Hydrogen/Helium atmosphere.
Venus.
Venus
Mars
planet venus
Venus
Jupiter
Venus.
Saturn has the moon Titan which has a thick hazy atmosphere.
Mars
Uranus
venus
Venus
Venus has the thickest carbon dioxide atmosphere.
planet venus
Venus
Venus.
Venus is the hottest planet, as it is close to the sun and also has a thick carbon dioxide atmosphere that holds the heat effectively.Venus is extremely hot because its thick atmosphere, rich in carbon dioxide, traps heat energy from the sun.