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You are here: Home / Space / What Are the Characteristics of the Inner Planets In Our Solar System and How Are the Inner Planets Similar?

What Are the Characteristics of the Inner Planets In Our Solar System and How Are the Inner Planets Similar?

June 4, 2020 by Karen Hill

In comparison to the outer planets, the four planets nearest the Sun are remarkably similar.

The inner planets are all basically made of dense rock; they are all relatively small; and they are all situated fairly close together.

Astronomers believe that the cores of the inner planets are made out of metals such as iron and nickel.

They have very few or no moons, and have no ring systems like Saturn, for example.

The surfaces temperatures of the inner planets are relatively hot, ranging from an average of 427°C (806°F) to –23°C (-9°F).

Their orbits are relatively quick, they take between 88 days and 687 days to revolve around the Sun.

Related Facts

  • What Are the Inner Planets and What Are the Names Of the Four Inner Planets In Our Solar System?
  • What Are the Outer Planets In the Solar System and What Are the Characteristics Of the Five Outer Planets?
  • Who discovered that Planets Exist Around Other Stars in the Universe and When?
  • Who Discovered the laws of planetary motion and that planets orbit around the sun in ellipses?
  • How do astronomers predict solar eclipses and How often does a total eclipse occur?
  • What Are the Differences Between Planets and Stars and How Are Stars and Planets Similar?

Filed Under: Space

About Karen Hill

Karen Hill is a freelance writer, editor, and columnist. Born in New York, her work has appeared in the Examiner, Yahoo News, Buzzfeed, among others.

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