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Inner Planets, Differences between the outer and inner planets, Outer…
Inner Planets
Mars has the largest mountain in the solar system, rising 78,000 feet
Much of the surface is very old and filled with craters, but there are geologically newer areas of the planet as well.
Mars is less dense than Earth and has a smaller magnetic field, which is indicative of a solid core, rather than a liquid one.
Venus has a thick, toxic carbon-monoxide-dominated atmosphere that traps heat, making it the hottest planet in the solar system.
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Of the four inner planets, Earth is the largest, and the only one with extensive regions of liquid water.
Water is necessary for life as we know it, and life is abundant on Earth
Earth has a rocky surface with mountains and canyons, and a heavy-metal core.
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Outer Planets
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Uranus is the only planet tilted on its side, and it also rotates backwards
The planet has 27 moons, and its atmosphere is made up of hydrogen, helium and methane
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