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Terrestrial Planets | Jovian Planets | Dwarf Planets | Planet Density | Planet Rotation. The first four planets are the terrestrial planets. A terrestrial planet has a metallic core (usually iron) and a rocky surface. The atmosphere of each terrestrial planets varies. Mercury has almost no atmosphere, while the surface of Venus has an atmospheric pressure 90 times that of the Earth! NO MOVIE.
The terrestrial planets are Mercury, Venus, the Earth, and Mars. They are characterized by a dense rocky surface with a dense core and overall are relatively dense. The other â¦ four planets are called the Jovian planets, or less formally, the gas giants, and include Jupiter, Saturn, Uranus, and Neptune.o, the inner planets are the terrestrial or rocky planets. The outer planets are the gas giant planets; Jupiter, Saturn, Uranus and Neptune.