The terrestrial planets are: Mercury, Venus, Earth, and Mars.
- They are the first four planets from the sun.
- They are smaller than the other planets known as Gas Giant Planets.
- Their surfaces are made of hard rock. This differs from the Gas Giant Planets as you will learn in the Gas Giants section.
Mercury: Excellent site with statistics of Mercury and size comparisons of other planets.
Picture: A Spectacular Rayed Crater on Mercury
Venus: Interactive site with statistics, photos and size comparisons.
Picture: Venus in the Moon
Earth: Excellent site with Earth statistics and size comparisons of other planets
Picture: 31 Million Miles from Planet Earth
Mars: Excellent site with statistics of Mars and size comparisons of other planets.
Picture: Radar Indicates Buried Glaciers on Mars
Separating the Terrestrial Planets from the Gas Giant Planets in the Asteroid Belt.
Asteroids and Comets: Learn more about asteroids and comets!
Picture: Amazing Comet Holmes