Planet mercury is the smallest planet in our solar system, it is a bit larger than the Earth’s moon as it is mentioned in the kid facts about Earth . Planet mercury is the closest planet to the Sun. Mercury is called terrestrial planet, which means it is an Earth-planet made of rocks or metals and it has a hard surface. Planets like Saturn are made of gas. Like Venus has no moons and no rings around it. This article teaches about kid facts about Mercury , which also helps the parents to share knowledge regarding the Solar system to their kids. Planet Mercury Important kid facts about Mercury 1. Planet mercury is 36 million miles away from the Sun: This might sound long way but actually the planet mercury is closest to the Sun. 2. Distance from Earth: The planet Mercury is 92 million kilometers away from the Earth. 3. Length of year on Mercu...