Terrestrial planet | astronomy | Britannica (original) (raw)

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classification of planets

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  In planet: Planets of the solar system
  …Mercury to Mars, are called terrestrial planets; those from Jupiter to Neptune are called giant planets or Jovian planets. Between these two main groups is a belt of numerous small bodies called asteroids. After Ceres and other larger asteroids were discovered in the early 19th century, the bodies in this…
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  In solar system: Planets and their moons
  The four inner, or terrestrial, planets—Mercury, Venus, Earth, and Mars—have rocky compositions and densities greater than 3 grams per cubic cm. (Water has a density of 1 gram per cubic cm.) In contrast, the four outer planets, also called the Jovian, or giant, planets—Jupiter, Saturn, Uranus, and Neptune—are large…
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formation

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  In solar system: Differentiation into inner and outer planets
  At this stage the individual accreting objects in the disk show differences in their growth and composition that depend on their distances from the hot central mass. Close to the nascent Sun, temperatures are too high for water to condense from…
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