If astronomers discovered a new inner planet in the solar system, which characteristic would it most likely have?

large size
gaseous composition
many moons
fast revolution

Fast revolution

Explanation:

The inner planets are composed of metallic rocks. They have rocky surface. The inner planets are Mercury, Venus, Earth and Mars. These are very small as compared to outer planets (Jupiter, Saturn, Uranus and Neptune). Also, the inner planets have very less moons as compared to outer planets. Outer planets have gaseous composition; mainly of hydrogen and helium.

The inner planets revolve around the sun faster than the outer planets. From Kepler's planetary law, we understand that the closer a planet to a star, faster would be its revolution and smaller would be its orbital period.

Thus, a new inner planet in the solar system would most likely have fast revolution.

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