
Astro Facts
In the Solar System, there are eight planets, including Earth. The planets spin on their own axis while revolving around the Sun. There are two types of planets: Terrestrial (Earth-like) planets and Jovian (Jupiter-like) planets. Terrestrial planets are Mercury, Venus, Earth and Mars, mostly made of metals and rocks. Jovian planets are Jupiter, Saturn, Uranus and Neptune, mostly made of gas. Jovian planets have a low density, with Saturn having the lowest. If there were a giant pool that fits Saturn, it would easily float on the water!!