A: Venus is the hottest planet in the solar system. Venus is covered in a planet of thick, yellow gas. The gas traps heat from the sun but don't let it escape. This means that the planet Venus can never ever be cooled.
Q2: Why is Mars called the red planet?
A: Kids, Mars is called the red planet because it is covered with red rocks and red dust (weird). Sometimes, the winds pick up the red dust and make up huge and swirling dust storms.
Q3: Which planet is baking hot and freezing cold?
A: Mercury is hot and cold both. It spins very slowly. The side which is facing the Sun is baked until it becomes hotter than the inside of an oven. When this side faces the away from the sun, it cools down until it is colder than a freezer.