Venus is the sixth largest planet as well as the hottest one in the solar system. Except the Sun and the Moon, Venus is the lightest star in the sky, just like a shinning diamond. So the Romans call it Venus.

Jupiter is the largest planet in the solar system. Its surface is colorful, and it also has a planetary ring (行星环). Jupiter is the king of gods in ancient Roman mythology (神话).

Mercury is closer to the Sun than any other planet, and it is the smallest planet in the solar system, which usually appears along the Sun. Mercury is a god that delivers messages for other gods in ancient Roman mythology.

Saturn is the second biggest planet in the solar system. Saturn’s rings are made of dust and ice. In Roman mythology Saturn is the god of time, because this planet moves slowly.