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1.Mars is only about one-half the diameter of Earth, but both planets have roughly the same amount of dry land surface area. This is because over two-thirds of the Earth's surface is covered by oceans, whereas the present surface of Mars has no liquid water.

2.Jupiter is a gas giant, which means it probably does not have a solid surface, and the gas it is made up of would be toxic for us. It is also very far from the sun (sunlight can take over an hour to get there) which means that is it very cold

3.Mercury's Temperature

Mercury's surface temperatures are both extremely hot and cold. Because the planet is so close to the Sun, day temperatures can reach highs of 800°F (430°C). ... The smallest planet in our solar system and nearest to the Sun, Mercury is only slightly larger than Earth's Moon.

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