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By mass, the majority of the matter orbiting the sun is hydrogen and helium. When the solar system was just starting to form heat from the sun and the strong solar wind drove most of the hydrogen, helium, and other gasses out of the inner solar system, leaving behind mostly rock and metal, which were much less abundant. The sunlight and solar wind in the outer solar system were much less intense, so these gasses remained in place long enough to become part of the giant planets.

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Q: Why are the inner planets smaller when the outer planets are larger?
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Related questions

What four inner planets are larger than the outer planets?

The inner planets are smaller than the outer planets.


Are outer planets or inner planets larger?

The outer planets are larger.


Are the inner planets smaller than the outer planets?

yes the inner planets are much smaller then the outer planets


Are outer planets larger and rockier than inner planets?

they are larger but not rockier then the inner planets the outer planets are made of gas.


Outer planets have smaller orbital periods than inner planets?

They are farther away and have larger orbital periods.


Are the inner planets larger then the outer planets and are they made of gas?

No. The outer planets are larger and are mainly gaseous.


Are the inner and outer planets different?

The inner planets are all rocky planets. The outer planets are completely made up of gases. The inner planets are much smaller than the outer planets.


Are the inner planets smaller then the outer planets?

Yes. The inner planets are Mercury, Venus, Earth, and Mars, and they are smaller than the outer planets: Jupiter, Saturn, Uranus, and Neptune.


What is the relative size of the inner planets?

The inner planets are smaller than the outer planets. This may be because the outer planets are called gas giants. This means that gas can accumulate in size at times, and this can be one of the situations.


How do the distances between inner planets compare to the distances between the outer planets?

The distances between the inner planets is smaller than the distances between the outer planets.


How do the distances between inner planets compare to distances between the outer planets?

The distances between the inner planets is smaller than the distances between the outer planets.


What makes the inner planets different from the outer planets?

The inner planets are small and rocky, the outer planets are much larger and have no solid surface, they are called the gas giants.