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If you look at the four outer planets, they are composed largely of easily vaporized substances substances: hydrogen, helium, water, ammonia, and methane. These light, volatile substances, which accounted for most of the mass of the proto solar system, were driven out of the inner solar system by the strong solar wind of the young sun, leaving the inner planets with material that was mostly rock and metal.

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What planet is the smallest planet not including dwarf planet?

Mercury is one of the four inner terrestrial planets, or rocky planets. It is the smallest of the four and closest to the sun. It is also the smallest of all eight planets.


What is the smallest planet out of the four inner planets?

Mercury is the smallest. It's slightly bigger than the moon.


Where are the 4 smallest planets located?

The 4 smallest planets are also the 4 most inner planets: Mercury, Venus, Earth and Mars.


What is the smallest planet out of the 4 inner planets?

Mercury is both the smallest inner panet, and the smallest planet in our entire solar system.


Is Mercury a giant or a rocky terrestrial?

Mercury is a rocky planet. The inner planets (first four planets from the sun) are rocky planets (which means that you could stand on them) and are the smallest. While the outer planets (last four planets from the sun) are gas planets and the biggest.


Is mercury a gas or a rocky terrestrial?

Mercury is a rocky planet. The inner planets (first four planets from the sun) are rocky planets (which means that you could stand on them) and are the smallest. While the outer planets (last four planets from the sun) are gas planets and the biggest.


What is the order of terrestrial planets smallest to largest?

The order of terrestrial planets from smallest to largest is Mercury, Mars, Venus, and Earth. Mercury is the smallest, followed by Mars, then Venus, and Earth is the largest of the four. These planets are primarily composed of rock and metal, distinguishing them from the gas giants.


What are the four planet closet to tha sun?

The four planets closest to the sun in order are Mercury, Venus, Earth, and Mars.


What is mercury planetary type?

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Which planets are comprised of just rock?

the first four planets, closet to the sun, are called the "rock planets" these are, in order from the sun outwards : mercury, venus, earth, mars after mars are the gas giants, which are not made of rock, but gas, as the name suggests.


What are the four planets closest to the sun called?

The 4 Planets closet to the sun are Mercury, Venus, Earth, & Mars. the inner or terrestrial planets


Which planets are considered small planets?

Referring to the actual 8 designated "planets", the closest four to the Sun are smaller and rocky, while the outer four are gas giants. Planets in order of size (smallest to largest): Mercury, Mars, Venus, Earth, Neptune, Uranus, Saturn, and Jupiter.