What are the Inner Planets and Outer Planets?
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Define the Inner Planets and Outer Planets? Or, What do You Mean by  the Inner Planets and Outer Planets?
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The the first four planets Mercury, Venus, Earth and Marks are called the Inner Planets. The rest of the planets are called the Outer Planets.

  • The four outer planets are mainly made up of hydrogen and helium gas.
  • The inner planets are made up of rocks and metals.

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